@article {3194704, title = {3D printing of ceramics and glass based on photopolymerizable sol\–gel compositions}, journal = {MRS Communications}, year = {2025}, abstract = {Stereolithography printing of ceramics and glass relies on compositions containing dispersed particles in photopolymerizable solutions. A new approach based on utilizing sol{\textendash}gel precursor solutions has been introduced in recent years, which overcomes challenges in particle-based printing compositions, such as light scattering, particle sedimentation, and high viscosity. Following sol{\textendash}gel and photopolymerization processes{\textquoteright} combination, this paper presents the methodologies for the 3D printing of complex ceramics and glass structures. This combination allows precise structure control, enabling dense or porous objects, transparent forms, and simple doping. These advantages are presented through the fabrication of porous γ-alumina, transparent silica glass, and chromium-doped α-alumina.}, url = {https://doi.org/10.1557/s43579-025-00700-5}, author = {May Yam Moshkovitz-Douvdevany and Amir Reisinger and Daria Savraeva and Shlomo Magdassi} } @article {3194705, title = {Digital light processing printing of non-modified protein-only compositions}, journal = {Materials Today Bio}, volume = {30}, year = {2025}, pages = {101384}, abstract = {This study explores the utilization of digital light processing (DLP) printing to fabricate complex structures using native gelatin as the sole structural component for applications in biological implants. Unlike approaches relying on synthetic materials or chemically modified biopolymers, this research harnesses the inherent properties of gelatin to create biocompatible structures. The printing process is based on a crosslinking mechanism using a di-tyrosine formation initiated by visible light irradiation. Formulations containing gelatin were found to be printable at the maximum documented concentration of 30\ wt\%, thus allowing the fabrication of overhanging objects and open embedded. Cell adhesion and growth onto and within the gelatin-based 3D constructs were evaluated by examining two implant fabrication techniques: (1) cell seeding onto the printed scaffold and (2) printing compositions that contain cells (cell-laden). The preliminary biological experiments indicate that both the cell-seeding and cell-laden strategies enable making 3D cultures of chondrocytes within the gelatin constructs. The mechanical properties of the gelatin scaffolds have a compressive modulus akin to soft tissues, thus enabling the growth and proliferation of cells, and later degrade as the cells differentiate and form a grown cartilage. This study underscores the potential of utilizing non-modified protein-only bioinks in DLP printing to produce intricate 3D objects with high fidelity, paving the way for advancements in regenerative tissue engineering.}, url = {https://doi.org/10.1016/j.mtbio.2024.101384}, author = {Ayelet Bunin and Orit Harari-Steinberg and Doron Kam and Tatyana Kuperman and Moran Friedman-Gohas and Bruria Shalmon and Liraz Larush and Shay I. Duvdevani and Shlomo Magdassi} } @article {3187300, title = {Tunable Lotus Leaf Effect by Three-Dimensionally Printed Stretchable Objects}, journal = {ACS Applied Materials \& Interfaces}, year = {2024}, abstract = {Adjustable wettability is important for various fields, such as droplet manipulation and controlled surface adhesion. Herein, we present high-resolution 3D stretchable structures with tunable superhydrophobicity, fabricated by a stereolithography-based printing process. The printing compositions comprise nonfluorinated monomers based on silicone urethane with dispersed hydrophobic silica particles. 3D lotus-like structures were designed and printed, having microsize pillars located at the external surfaces, with controlled dimensions and interspacing. The design of the pillars and the presence of the hydrophobic silica particles resulted in superhydrophobicity due to the surface structuring and entrapment of air between the pillars. The best structures display a contact angle of 153.3{\textdegree} {\textpm} 1.3{\textdegree} and rolling angle of 3.3{\textdegree} {\textpm} 0.5{\textdegree}, and their self-cleaning, water repellency, and buoyancy are demonstrated. The durability of the structure over time, water immersion, and heat exposure were tested, confirming the preservation of superhydrophobicity under these conditions. Upon stretching the surfaces, the interpillar distances change, thus enabling tuning the wetting properties and achieving good control over the contact and rolling angles, while the stretching-induced superhydrophobicity is reversible. This approach can expand the potential applications of superhydrophobic soft materials to fields requiring control over the wetting properties, including soft robotics, biomedical devices, and stretchable electronics.}, url = {https://doi.org/10.1021/acsami.4c14238}, author = {Noa Trink and Shlomo Magdassi} } @article {3187346, title = {Additive manufacturing: from 2D to 4D printing}, journal = {The Israel Chemist and Chemical Engineer}, year = {2024}, pages = {33-42}, url = {https://designrr.page/?id=389011\&token=109301396\&type=FP\&h=4588}, author = {Doron Kam and May Yam Moshkovitz and Ouriel Baliah and Alexander Kamyshny and Shlomo Magdassi} } @article {3186533, title = {Continuous Material Deposition on Filaments in Fused Deposition Modeling}, journal = {Polymers}, volume = {16}, year = {2024}, pages = {2904}, abstract = {

A novel approach, i.e., Continuous Material Deposition on Filaments (CMDF), for the incorporation of active materials within 3D-printed structures is presented. It is based on passing a filament through a solution in which the active material is dissolved together with the polymer from which the filament is made. This enables the fabrication of a variety of functional 3D-printed objects by fused deposition modeling (FDM) using commercial filaments without post-treatment processes. This generic approach has been demonstrated in objects using three different types of materials, Rhodamine B, ZnO nanoparticles (NPs), and Ciprofloxacin (Cip). The functionality of these objects is demonstrated through strong antibacterial activity in ZnO NPs and the controlled release of the antibiotic Cip. CMDF does not alter the mechanical properties of FDM-printed structures, can be applied with any type of FDM printer, and is, therefore, expected to have applications in a wide variety of fields.

}, url = {https://doi.org/10.3390/polym16202904}, author = {Guy Naim and Shlomo Magdassi and Daniel Mandler} } @article {3185901, title = {Unlocking enhanced piezoelectric performance through 3D printing of particle-free ceramic piezoelectric complex structures and metamaterials}, journal = {Chemical Engineering Journal}, volume = {499}, year = {2024}, pages = {156189}, abstract = {Piezoelectric materials have found widespread use in miniaturized sensors and actuators due to their ability of mutual conversion of mechanical and electric energy. However, current fabrication techniques for these materials are limited to either bulky structures or thin films, restricting the potential that could arise from developing devices with more intricate geometries. Here, we have developed particle-free piezoelectric ink and successfully employed in 3D printing complex barium titanate (BTO) devices using Digital Light Processing technology. The sol{\textendash}gel process overcomes the viscosity and light scattering issues associated with the slurry traditionally used in 3D printing of piezoelectric ceramic materials. Printed BTO exhibits a remarkable piezoelectric coefficient of 50\ pm/V and is utilized to create 3D micrometric structures for applications as both active devices, such as actuators, and passive devices, including displacement sensors and energy harvesters. Furthermore, the flexibility in device fabrication enabled us to 3D print metamaterial piezoelectric structures, designed to concentrate mechanical stress, thereby enhancing the electrical response compared to conventional bulk structures. This research not only advances the field by overcoming fabrication challenges but also opens avenues for creating innovative devices. The design freedom afforded by additive manufacturing technology further underscores the potential for groundbreaking developments in this domain.}, url = {https://doi.org/10.1016/j.cej.2024.156189}, author = {Tamar Rosental and Gabriele Gatani and Candido Fabrizio Pirri and Carlo Ricciardi and Daria Savraeva and Ayelet Bunin and May Yam Moshkovitz-Douvdevany and Shlomo Magdassi and Stefano Stassi} } @article {3183777, title = {Additive manufacturing of transparent conductive indium tin oxide by sol-gel and multiphoton absorption polymerization}, journal = {Additive Manufacturing}, volume = {91}, year = {2024}, pages = {104388}, abstract = {

Many optoelectronic devices, such as solar cells and LEDs, require materials that possess both transparency and conductivity. Indium tin oxide (ITO), the most commonly used transparent conductor, is limited to flat thin films and, therefore, cannot be used in 3D electronics. Herein, we present the fabrication of complex 3D ITO structures at sub-micron resolution via multiphoton absorption polymerization (MAP), a vat photopolymerization technology, by combining sol-gel chemistry and radical polymerization. Following the MAP fabrication, heat treatment is applied to convert the gel into a ceramic ITO. The sintering temperature affects the porosity, electrical conductivity, and transparency of the printed ITO structures. Electrical conductivity was measured for printed objects sintered at temperatures starting at 700 {\textdegree}C up to 1150 {\textdegree}C with a maximum bulk conductivity of 14.47 {\textpm} 1.54 S/cm at 1000 {\textdegree}C and maximal transparency above 90 \%. Enabling the fabrication of full 3D conductive ITO micro-structures via MAP, this work unlocks new possibilities and perspectives for the fabrication of 3D optoelectronic devices with transparent and conductive components.

}, url = {https://doi.org/10.1016/j.addma.2024.104388}, author = {Tamar Rosental and Andrea Ottomaniello and Sapir Mizrahi and Naor Menda and May Yam Moshkovitz Douvdevany and Liraz Larush and Daria Savraeva and Natanel Jarach and Virgilio Mattoli and Shlomo Magdassi} } @article {3185482, title = {Vat photopolymerization printing by thermal polymerisation utilising carbon nanotubes as photothermal converters}, journal = {Virtual and Physical Prototyping}, volume = {19}, year = {2024}, pages = {e2391480}, abstract = {Traditional printing compositions for stereolithography (SLA), a vat photopolymerization technology, rely on light-sensitive photoinitiators (PIs) to initiate cross-linking reactions. Here, we propose a new approach for printing in which the polymerisation occurs locally with carbon nanotubes (CNTs), which function as photothermal converters combined with low-cost thermal initiators (TIs). The irradiation is performed at near-infrared (NIR), which enables deep light penetration, and polymerisation in black compositions, thus increasing the printing throughput. We demonstrate the control over polymerisation kinetics, printing resolution and cure depth, achieving very large printable layer thickness. The CNT photoconvertors can be used in both nonaqueous and aqueous systems, while the latter addresses the limited availability of water-soluble PIs for printing in water. The CNT enables dual use, initiating polymerisation and printing composite materials. This approach presents an advancement in SLA-based technologies, avoiding the use of conventional PIs and thus broadening the scope of 3D printing applications.}, url = {https://doi.org/10.1080/17452759.2024.2391480}, author = {Doron Kam and Rama Lieberman and Noa Trink and Omri Rulf and Shlomo Magdassi} } @article {3182021, title = {Fabrication of Ruby by 3D Printing of Transparent Salt Solutions}, journal = {Journal of the European Ceramic Society}, year = {2024}, pages = {116773}, abstract = {A novel method is presented for fabricating 3D-printed Cr3+-doped α-Al2O3\ complex structures, known as Ruby, using digital light processing (DLP) 3D printing and sol-gel reactions based on solutions only. The aqueous printing solution comprises aluminum and chromium chloride as the sol-gel precursor and acrylic acid (AA) as the polymerizable component. After photopolymerization, aging, and sintering at 1150{\textdegree}C, structures shrink up to 28{\textpm}7\%, achieving a final printing resolution of 55.7{\textpm}0.7 μm, surpassing the nominal printer{\textquoteright}s resolution of 200 μm. Characterization includes X-ray diffraction, scanning electron microscopy, UV-Vis, and fluorescence measurements, revealing crystalline Cr:α-Al2O3\ composition emitting at 693\ nm. The structures exhibit maximum compression stress of 89{\textpm}3\ MPa and microhardness of 340-500 HV, showcasing potential applications in thermal insulation, jewelry, and mechanical uses.}, url = {https://doi.org/10.1016/j.jeurceramsoc.2024.116773}, author = {May Yam Moshkovitz Douvdevany and Danielle Paz and Shlomo Magdassi} } @article {3182028, title = {3D-Printed Mechano-Optic Force Sensor for Soft Robotic Gripper Enabled by Programmable Structural Metamaterials}, journal = {Advanced Intelligent Systems}, year = {2024}, pages = {2400057}, abstract = {Rapid deployment of automation in today{\textquoteright}s world has opened up exciting possibilities in the realm of design and fabrication of soft robotic grippers endowed with sensing capabilities. Herein, a novel design and rapid fabrication by 3D printing of a mechano-optic force sensor with a large dynamic range, sensitivity, and linear response, enabled by metamaterials-based structures, is presented. A simple approach for programming the metamaterial{\textquoteright}s behavior based on mathematical modeling of the sensor under dynamic loading is proposed. Machine learning models are utilized to predict the complete force{\textendash}deformation profile, encompassing the linear range, the onset of nonlinear behavior, and the slope of profiles in both bending and compression-dominated regions. The design supports seamless integration of the sensor into soft grippers, enabling 3D printing of the soft gripper with an embedded sensor in a single step, thus overcoming the tedious and complex and multiple fabrication steps commonly applied in conventional processes. The sensor boasts a fine resolution of 0.015 N, a measurement range up to 16 N, linearity (adj.\ R2{\textendash}0.991), and delivers consistent performance beyond 100 000 cycles. The sensitivity and range of the embedded mechano-optic force sensor can be easily programmed by both the metamaterial structure and the material{\textquoteright}s properties.}, url = {https://doi.org/10.1002/aisy.202400057}, author = {Chidanand Hegde and Ravi Chaithanya Mysa and Aaron Chooi and Saikrishna Dontu and Joel Ming Rui Tan and Lydia Helena Wong and Pablo Valdivia y Alvarado and Shlomo Magdassi} } @article {3182023, title = {Applications of a vacuum-actuated multi-material hybrid soft gripper: lessons learnt from RoboSoft manipulation challenge}, journal = {Frontiers in Robotics and AI}, volume = {11}, year = {2024}, pages = {1356692}, abstract = {Soft grippers are garnering increasing attention for their adeptness in conforming to diverse objects, particularly delicate items, without warranting precise force control. This attribute proves especially beneficial in unstructured environments and dynamic tasks such as food handling. Human hands, owing to their elevated dexterity and precise motor control, exhibit the ability to delicately manipulate complex food items, such as small or fragile objects, by dynamically adjusting their grasping configurations. Furthermore, with their rich sensory receptors and hand-eye coordination that provide valuable information involving the texture and form factor, real-time adjustments to avoid damage or spill during food handling appear seamless. Despite numerous endeavors to replicate these capabilities through robotic solutions involving soft grippers, matching human performance remains a formidable engineering challenge. Robotic competitions serve as an invaluable platform for pushing the boundaries of manipulation capabilities, simultaneously offering insights into the adoption of these solutions across diverse domains, including food handling. Serving as a proxy for the future transition of robotic solutions from the laboratory to the market, these competitions simulate real-world challenges. Since 2021, our research group has actively participated in RoboSoft competitions, securing victories in the Manipulation track in 2022 and 2023. Our success was propelled by the utilization of a modified iteration of our Retractable Nails Soft Gripper (RNSG), tailored to meet the specific requirements of each task. The integration of sensors and collaborative manipulators further enhanced the gripper{\textquoteright}s performance, facilitating the seamless execution of complex grasping tasks associated with food handling. This article encapsulates the experiential insights gained during the application of our highly versatile soft gripper in these competition environments.}, author = {Saikrishna Dontu and Elgar Kanhere and Thileepan Stalin and Audelia Gumarus Dharmawan and Chidanand Hegde and Jiangtao Su and Xiaodong Chen and Shlomo Magdassi and Gim Song Soh and Pablo Valdivia Y. Alvarado} } @article {3175227, title = {The Impact of Piezoelectricity in Low Dimensional Metal Halide Perovskite}, journal = {ACS Energy Letters}, volume = {9}, year = {2024}, pages = {1527{\textendash}1536}, abstract = {Hybrid perovskites show piezoelectric properties due to polarization and centro-symmetry breaking of PbX6\ pyramids (X = I-, Br-, Cl-). This study examines the piezoelectric response of quasi-2D perovskites using various barrier molecules: benzyl amine (BzA), phenylethyl amine (PEA), and butyl diamine (BuDA). Utilizing piezoelectric force microscopy measurements, we determine the piezoelectric coefficient (d33) where BuDA exhibits a substantial response with values of 147 pm V{\textendash}1\ for\ n\ = 5, better than the other quasi-2D and 3D perovskite counterparts. Density functional theory calculations reveal distorted bond angles in the PbBr6\ pyramids for quasi-2D perovskites, enhancing symmetry breaking. Additionally, polarizabilities and dielectric constants, derived from\ ab initio\ many-body perturbation theory, are highest for BuDA, followed by PEA and BzA, aligning with experimental results. We demonstrate pressure sensor performance, emphasizing the quicker capacitance decay time of the quasi-2D perovskite based on BuDA. This research underscores the impact of perovskite dimensionality on piezoelectricity, paving the way for the development of sensitive and wide-ranging pressure sensors.}, url = {https://doi.org/10.1021/acsenergylett.4c00177}, author = {Stav Rahmany and Adva Shpatz Dayan and Ma{\l}gorzata Wierzbowska and Amanda Jiamin Ong and Yun Li and Shlomo Magdassi and Alfred Iing Yoong Tok and lioz etgar} } @article {3175229, title = {3D printing by stereolithography using thermal initiators}, journal = {Nature Communications}, volume = {15}, year = {2024}, pages = {2285}, abstract = {Additive manufacturing technologies based on stereolithography rely on initiating spatial photopolymerization by using photoinitiators activated by UV-visible light. Many applications requiring printing in water are limited since water-soluble photoinitiators are scarce, and their price is skyrocketing. On the contrary, thermal initiators are widely used in the chemical industry for polymerization processes due to their low cost and simplicity of initiation by heat at low temperatures. However, such initiators were never used in 3D printing technologies, such as vat photopolymerization stereolithography, since localizing the heat at specific printing voxels is impossible. Here we propose using a thermal initiator for 3D printing for localized polymerization processes by near-infrared and visible light irradiation without conventional photoinitiators. This is enabled by using gold nanorods or silver nanoparticles at very low concentrations as photothermal converters in aqueous and non-aqueous mediums. Our proof of concept demonstrates the fabrication of hydrogel and polymeric objects using stereolithography-based 3D printers, vat photopolymerization, and two-photon printing.}, url = {https://doi.org/10.1038/s41467-024-46532-0}, author = {Doron Kam and Omri Rulf and Amir Reisinger and Shlomo Magdassi} } @article {3182026, title = {Intracranial Assessment of Androgen Receptor Antagonists in Mice Bearing Human Glioblastoma Implants}, journal = {International Journal of Molecular Sciences}, volume = {25}, year = {2023}, pages = {332}, abstract = {The median survival time of patients with an aggressive brain tumor, glioblastoma, is still poor due to ineffective treatment. The discovery of androgen receptor (AR) expression in 56\% of cases offers a potential breakthrough. AR antagonists, including bicalutamide and enzalutamide, induce dose-dependent cell death in glioblastoma and glioblastoma-initiating cell lines (GIC). Oral enzalutamide at 20 mg/kg reduces subcutaneous human glioblastoma xenografts by 72\% (p\ = 0.0027). We aimed to further investigate the efficacy of AR antagonists in intracranial models of human glioblastoma. In U87MG intracranial models, nude mice administered Xtandi (enzalutamide) at 20 mg/kg and 50 mg/kg demonstrated a significant improvement in survival compared to the control group (p\ = 0.24 and\ p\ \< 0.001, respectively), confirming a dose{\textendash}response relationship. Additionally, we developed a newly reformulated version of bicalutamide, named {\textquotedblleft}soluble bicalutamide (Bic-sol){\textquotedblright}, with a remarkable 1000-fold increase in solubility. This reformulation significantly enhanced bicalutamide levels within brain tissue, reaching 176\% of the control formulation{\textquoteright}s area under the curve. In the U87MG intracranial model, both 2 mg/kg and 4 mg/kg of Bic-sol exhibited significant efficacy compared to the vehicle-treated group (p\ = 0.0177 and\ p\ = 0.00364, respectively). Furthermore, combination therapy with 8 mg/kg Bic-sol and Temozolomide (TMZ) demonstrated superior efficacy compared to either Bic-sol or TMZ as monotherapies (p\ = 0.00706 and\ p\ = 0.0184, respectively). In the ZH-161 GIC mouse model, the group treated with 8 mg/kg Bic-sol as monotherapy had a significantly longer lifespan than the groups treated with TMZ or the vehicle (p\ \< 0.001). Our study demonstrated the efficacy of androgen receptor antagonists in extending the lifespan of mice with intracranial human glioblastoma, suggesting a promising approach to enhance patient outcomes in the fight against this challenging disease.}, url = {https://doi.org/10.3390/ijms25010332}, author = {Nomi Zalcman and Liraz Larush and Haim Ovadia and Hanna Charbit and Shlomo Magdassi and Iris Lavon} } @article {3182022, title = {3D Printing of Self-Healing Materials}, journal = {Advanced Materials}, volume = {36}, year = {2023}, pages = {2305537}, abstract = {This review article presents a comprehensive overview of the latest advances in the field of 3D printable structures with self-healing properties. Three-dimensional printing (3DP) is a versatile technology that enables the rapid manufacturing of complex geometric structures with precision and functionality not previously attainable. However, the application of 3DP technology is still limited by the availability of materials with customizable properties specifically designed for additive manufacturing. The addition of self-healing properties within 3D printed objects is of high interest as it can improve the performance and lifespan of structural components, and even enable the mimicking of living tissues for biomedical applications, such as organs printing. The review will discuss and analyze the most relevant results reported in recent years in the development of self-healing polymeric materials that can be processed via 3D printing. After introducing the chemical and physical self-healing mechanism that can be exploited, the literature review here reported will focus in particular on printability and repairing performances. At last, actual perspective and possible development field will be critically discussed.}, url = { https://doi.org/10.1002/adma.202305537}, author = {Ignazio Roppolo and Matteo Caprioli and Candido F Pirri and Shlomo Magdassi} } @article {3182027, title = {Additive Manufacturing of Transparent Multi-Component Nanoporous Glasses}, journal = {Advanced Science}, volume = {10}, year = {2023}, pages = {2305775}, abstract = {Fabrication of glass with complex geocd the low resolution of particle-based or fused glass technologies. Herein, a high-resolution 3D printing of transparent nanoporous glass is presented, by the combination of transparent photo-curable sol{\textendash}gel printing compositions and digital light processing (DLP) technology. Multi-component glass, including binary (Al2O3-SiO2), ternary (ZnO-Al2O3-SiO2, TiO2-Al2O3-SiO2), and quaternary oxide (CaO-P2O5-Al2O3-SiO2) nanoporous glass objects with complex shapes, high spatial resolutions, and multi-oxide chemical compositions are fabricated, by DLP printing and subsequent sintering process. The uniform nanopores of Al2O3-SiO2-based nanoporous glasses with the diameter (≈6.04\ nm), which is much smaller than the visible light wavelength, result in high transmittance (\>95\%) at the visible range. The high surface area of printed glass objectives allows post-functionalization via the adsorption of functional guest molecules. The photoluminescence and hydrophobic modification of 3D printed glass objectives are successfully demonstrated. This work extends the scope of 3D printing to transparent nanoporous glasses with complex geometry and facile functionalization, making them available for a wide range of applications.}, url = { https://doi.org/10.1002/advs.202305775}, author = {Beining Li and Zhenjiang Li and Ido Cooperstein and Wenze Shan and Shuaipeng Wang and Benxue Jiang and Long Zhang and Shlomo Magdassi and Jin He} } @article {3165242, title = {Fully Recyclable Cured Polymers for Sustainable 3D Printing}, journal = {Advanced Materials}, volume = {36}, year = {2023}, pages = {2307297}, abstract = {The most prevalent materials used in the Additive Manufacturing era are polymers and plastics. Unfortunately, these materials are recognized for their negative environmental impact as they are primarily nonrecyclable, resulting in environmental pollution. In recent years, a new sustainable alternative to these materials has been emerging: Reversible Covalent Bond-Containing Polymers (RCBPs). These materials can be recycled, reprocessed, and reused multiple times without losing their properties. Nonetheless, they have two significant drawbacks when used in 3D printing. First, some require adding new materials every reprinting cycle, and second, others require high temperatures for (re)printing, limiting recyclability, and increasing energy consumption. This study, thus, introduces fully recyclable RCBPs as a sustainable approach for radiation-based printing technologies. This approach enables multiple (re)printing cycles at low temperatures (50\ {\textdegree}C lower than the lowest reported) without adding new materials. It involves purposefully synthesized polymers that undergo reversible photopolymerization, composed of a tin-based catalyst. An everyday microwave oven quickly depolymerized these polymers, obtaining complete reversibility.}, url = { https://doi.org/10.1002/adma.202307297}, author = {Jarach, Natanel and Dodiuk, Hanna and Kenig, Samuel and Magdassi, Shlomo} } @article {3182025, title = {ZnO quantum photoinitiators as an all-in-one solution for multifunctional photopolymer nanocomposites}, journal = {ACS nano}, volume = {17}, year = {2023}, pages = {20366-20375}, abstract = {Nanocomposites are constructed from a matrix material combined with dispersed nanosized filler particles. Such a combination yields a powerful ability to tailor the desired mechanical, optical, electrical, thermodynamic, and antimicrobial material properties. Colloidal semiconductor nanocrystals (SCNCs) are exciting potential fillers, as they display size-, shape-, and composition-controlled properties and are easily embedded in diverse matrices. Here we present their role as quantum photoinitiators (QPIs) in acrylate-based polymer, where they act as a catalytic radical initiator and endow the system with mechanical, photocatalytic, and antimicrobial properties. By utilizing ZnO nanorods (NRs) as QPIs, we were able to increase the tensile strength and elongation at break of poly(ethylene glycol) diacrylate (PEGDA) hydrogels by up to 85\%, unlike the use of the same ZnO NRs acting merely as fillers. Simultaneously, we endowed the PEGDA hydrogels with post-polymerization photocatalytic and antimicrobial activities and showed their ability to decompose methylene blue and significantly eradicate antibiotic-resistant bacteria and viral pathogens. Moreover, we demonstrate two fabrication showcase methods, traditional molding and digital light processing printing, that can yield hydrogels with complex architectures. These results position SCNC-based systems as promising candidates to act as all-in-one photoinitiators and fillers in nanocomposites for diverse biomedical applications, where specific and purpose-oriented characteristics are required.}, url = {https://pubs.acs.org/doi/full/10.1021/acsnano.3c06518}, author = {Tom Naor and Shira Gigi and Nir Waiskopf and Gila Jacobi and Sivan Shoshani and Doron Kam and Shlomo Magdassi and Ehud Banin and Uri Banin} } @article {26983, title = {3D Printing of Resilin in Water by Multiphoton Absorption Polymerization}, journal = {Advanced Functional Materials}, year = {2023}, month = {2023///}, pages = {2210993 - 2210993}, publisher = {John Wiley \& Sons, Ltd}, abstract = {Resilin is an elastic rubber-like protein found in the cuticles of insects. It incorporates outstanding properties of high resilience and fatigue lifetime, where kinetic energy storage is needed for biological functions such as flight and jumps. Since resilin is rich in tyrosine groups, localized photopolymerization is enabled due to the ability to introduce di-tyrosine bonds by a ruthenium-based photoinitiator. Using Multiphoton Absorption Polymerization 3D printing process, objects containing 100\% recombinant resilin protein are printed in water at a submicron length scale. Consequently, protein-based hydrogels with complex structures are printed using space positioning voxel polymerization. The objects are characterized by dynamic mechanical analysis using nanoindentation. Printing parameters such as printing speed and laser power are found to enable tuning the mechanical properties of the printed objects. The printed objects are soft and resilient, similar to native resilin, while presenting the highest resolution of a structure made entirely of a protein and better mechanical properties of common hydrogels and poly(dimethylsiloxane). Moreover, topography and mechanical properties enable cell growth and alignment without cell adhesion primers, thus facilitating biological applications. The fabrication of 3D resilin-based hydrogel will open the way for potential applications based on biomimicking and in creating new functional objects.}, keywords = {multiphoton polymerization, nanoindentation, photopolymerization, Proteins, resilin}, url = {https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.202210993https://onlinelibrary.wiley.com/doi/abs/10.1002/adfm.202210993https://onlinelibrary.wiley.com/doi/10.1002/adfm.202210993}, author = {Kam, Doron and Olender, Aaron and Rudich, Amir and Kan-Tor, Yoav and Buxboim, Amnon and Shoseyov, Oded and Magdassi, Shlomo} } @article {D3MH00773A, title = {3D printing stretchable and compressible porous structures by polymerizable emulsions for soft robotics}, journal = {Mater. Horiz.}, volume = {10}, year = {2023}, pages = {4976-4985}, publisher = {The Royal Society of Chemistry}, abstract = {UV-curable 3D printing compositions for the fabrication of stretchable and flexible porous structures for soft robotics are presented. The stereolithography-based printing compositions are water-in-oil (W/O) emulsions in which water droplets are the pore-forming material, and the continuous phase is a stretchable polyurethane diacrylate (PUA). The porosity of the printed objects is controlled by the material{\textquoteright}s micro-porosity and by the macro-porosity obtained by a cellular design. The mechanical behavior can be tailored by the composition of the emulsion, providing both compliance and strength while utilizing a unique optimization methodology for fitting the ink to the 3D printer. This approach enables developing materials having superior mechanical properties, with the highest reported elongation-at-break for 3D printed porous structures, 450\%. The emulsion-based printing compositions were utilized for fabricating a soft robotic gripper with unique actuation performance that could not be obtained with commonly used materials.}, doi = {10.1039/D3MH00773A}, url = {http://dx.doi.org/10.1039/D3MH00773A}, author = {Bliah, Ouriel and Joe, Seonggun and Reinberg, Roei and Nardin, Anderson B. and Beccai, Lucia and Magdassi, Shlomo} } @article {Binyamin2023-xw, title = {3D Printing Thermally Stable High-Performance Polymers Based on a Dual Curing Mechanism}, journal = {Advanced Functional Materials}, volume = {33}, number = {24}, year = {2023}, month = {mar}, pages = {2214368}, publisher = {John Wiley \& Sons, Ltd}, abstract = {High-performance polymers are an important class of materials that are used in challenging conditions, such as in aerospace applications. Until now, 3D printing based on stereolithography processes can not be performed due to a lack of suitable materials. There is report on new materials and printing compositions that enable 3D printing of objects having extremely high thermal resistance, with Tg of 283 {\textdegree}C and excellent mechanical properties. The printing is performed by a low-cost Digital Light Processing printer, and the formulation is based on a dual-cure mechanism, photo, and thermal process. The main components are a molecule that has both epoxy and acrylate groups, alkylated melamine that enables a high degree of crosslinking, and a soluble precursor of silica. The resulting objects are made of hybrid materials, in which the silicon is present in the polymeric backbone and partly as silica enforcement particles.}, keywords = {3d printing, alkylated melamine, DLP, dual cures, epoxyacrylate, hybrids}, author = {Binyamin, Iris and Grossman, Eitan and Gorodnitsky, Matanel and Kam, Doron and Magdassi, Shlomo} } @article {26984, title = {Angle-independent solar radiation capture by 3D printed lattice structures for efficient photoelectrochemical water splitting}, journal = {Materials Horizons}, year = {2023}, month = {2023///}, publisher = {Royal Society of Chemistry}, abstract = {Photoelectrochemical water splitting is one of the sustainable routes to renewable hydrogen production. One of the challenges to deploying photoelectrochemical (PEC) based electrolyzers is the difficulty in the effective capture of solar radiation as the illumination angle changes throughout the day. Herein, we demonstrate a method for the angle-independent capture of solar irradiation by using transparent 3 dimensional (3D) lattice structures as the photoanode in PEC water splitting. The transparent 3D lattice structures were fabricated by 3D printing a silica sol-gel followed by aging and sintering. These transparent 3D lattice structures were coated with a conductive indium tin oxide (ITO) thin film and a Mo-doped BiVO4 photoanode thin film by dip coating. The sheet resistance of the conductive lattice structures can reach as low as 340 Ohms per sq for \~82\% optical transmission. The 3D lattice structures furnished large volumetric current densities of 1.39 mA cm-3 which is about 2.4 times higher than a flat glass substrate (0.58 mA cm-3) at 1.23 V and 1.5 G illumination. Further, the 3D lattice structures showed no significant loss in performance due to a change in the angle of illumination, whereas the performance of the flat glass substrate was significantly affected. This work opens a new paradigm for more effective capture of solar radiation that will increase the solar to energy conversion efficiency.}, url = {https://pubs.rsc.org/en/content/articlehtml/2023/mh/d2mh01475khttps://pubs.rsc.org/en/content/articlelanding/2023/mh/d2mh01475k}, author = {Hegde, Chidanand and Rosental, Tamar and Tan, Joel Ming Rui and Magdassi, Shlomo and Lydia Helena Wong} } @article {Farraj2023-zc, title = {E-Textile by Printing an All-through Penetrating Copper Complex Ink}, journal = {ACS Applied Materials and Interfaces}, volume = {15}, number = {17}, year = {2023}, pages = {21651{\textendash}21658}, publisher = {American Chemical Society}, abstract = {Wearable electronics is an emerging field in academics and industry, in which electronic devices, such as smartwatches and sensors, are printed or embedded within textiles. The electrical circuits in electronics textile (e-textile) should withstand many cycles of bending and stretching. Direct printing of conductive inks enables the patterning of electrical circuits; however, while using conventional nanoparticle-based inks, printing onto the fabric results in a thin layer of a conductor, which is not sufficiently robust and impairs the reliability required for practical applications. Here, we present a new process for fabricating robust stretchable e-textile using a thermodynamically stable, solution-based copper complex ink, which is capable of full penetrating the fabric. After printing on knitted stretchable fabrics, they were heated, and the complex underwent an intermolecular self-reduction reaction. The continuously formed metallic copper was used as a seed layer for electroless plating (EP) to form highly conductive circuits. It was found that the stretching direction has a significant role in resistivity. This new approach enables fabricating e-textiles with high stretchability and durability, as demonstrated for wearable gloves, toward printing functional e-textile.}, keywords = {copper complex, copper ink, e-textile, printed electronics, wearable electronics}, author = {Farraj, Yousef and Kanner, Aviad and Magdassi, Shlomo} } @article {Tan2023-sc, title = {Fabrication Approaches of Soft Electronics}, journal = {ACS Applied Electronic Materials}, volume = {5}, number = {3}, year = {2023}, pages = {1376{\textendash}1393}, publisher = {American Chemical Society}, abstract = {The use of conductive materials to be printed/embedded onto/within a polymeric matrix has gained increasing attention in the fabrication of next-generation soft electronics. In this review, we provide a comprehensive overview of the materials and approaches for the fabrication of 2D and 3D conductive structures while focusing on the importance of the compatibility between the particles{\textquoteright} shape, the polymeric matrix type, and the deposition method, along with the target application. The review presents a summary of the main conductive materials and the type of polymeric materials which were utilized for fabricating soft electronic devices that are bendable/twistable and stretchable. It is divided into two sections: Introduction section, which presents briefly conductive materials, polymeric matrix, and fabrication methods, and Fabrication section, presenting the main 6 approaches of fabrication. Each of the fabrication subsections presents the main recent reports in a detailed table. The review is concluded with an Outlook section, describing the current challenges in this field. Despite the progress in the fabrication of 2D bendable/twistable electronic devices toward industrial integration, there is still a need for tailoring and improving the durability and robustness of 3D stretchable electronic devices.}, keywords = {2D printed sensors, 3D printed sensors, printed electronics, soft electronics, soft sensors}, author = {Tan, Joel Ming Rui and Farraj, Yousef and Kamyshny, Alexander and Magdassi, Shlomo} } @article {26986, title = {Inkjet-Printed Flexible Semitransparent Solar Cells with Perovskite and Polymeric Pillars}, journal = {Solar RRL}, volume = {7}, number = {6}, year = {2023}, month = {2023/03//}, pages = {2200988 - 2200988}, publisher = {John Wiley \& Sons, Ltd}, keywords = {flexible solar cells, inkjet printing, perovskite solar cells, semitransparency, solvent engineering}, url = {https://onlinelibrary.wiley.com/doi/full/10.1002/solr.202200988https://onlinelibrary.wiley.com/doi/abs/10.1002/solr.202200988https://onlinelibrary.wiley.com/doi/10.1002/solr.202200988}, author = {Naresh Kumar Pendyala and Magdassi, Shlomo and lioz etgar} } @article {https://doi.org/10.1002/advs.202302080, title = {Jointless Bioinspired Soft Robotics by Harnessing Micro and Macroporosity}, journal = {Advanced Science}, volume = {10}, number = {23}, year = {2023}, pages = {2302080}, abstract = {Abstract Although natural continuum structures, such as the boneless elephant trunk, provide inspiration for new versatile grippers, highly deformable, jointless, and multidimensional actuation has still not been achieved. The challenging pivotal requisites are to avoid sudden changes in stiffness, combined with the capability of providing reliable large deformations in different directions. This research addresses these two challenges by harnessing porosity at two levels: material and design. Based on the extraordinary extensibility and compressibility of volumetrically tessellated structures with microporous elastic polymer walls, monolithic soft actuators are fabricated by 3D printing unique polymerizable emulsions. The resulting monolithic pneumatic actuators are printed in a single process and are capable of bidirectional movements with just one actuation source. The proposed approach is demonstrated by two proof-of-concepts: a three-fingered gripper, and the first ever soft continuum actuator that encodes biaxial motion and bidirectional bending. The results open up new design paradigms for continuum soft robots with bioinspired behavior based on reliable and robust multidimensional motions.}, keywords = {elephant trunks, Porous materials, programmed motion, soft robotics, volumetric tessellation}, doi = {https://doi.org/10.1002/advs.202302080}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1002/advs.202302080}, author = {Joe, Seonggun and Bliah, Ouriel and Magdassi, Shlomo and Beccai, Lucia} } @article {Luo2023-vz, title = {Technology Roadmap for Flexible Sensors}, journal = {ACS Nano}, volume = {17}, number = {6}, year = {2023}, month = {mar}, pages = {5211{\textendash}5295}, publisher = {American Chemical Society (ACS)}, abstract = {Humans rely increasingly on sensors to address grand challenges and to improve quality of life in the era of digitalization and big data. For ubiquitous sensing, flexible sensors are developed to overcome the limitations of conventional rigid counterparts. Despite rapid advancement in bench-side research over the last decade, the market adoption of flexible sensors remains limited. To ease and to expedite their deployment, here, we identify bottlenecks hindering the maturation of flexible sensors and propose promising solutions. We first analyze challenges in achieving satisfactory sensing performance for real-world applications and then summarize issues in compatible sensor-biology interfaces, followed by brief discussions on powering and connecting sensor networks. Issues en route to commercialization and for sustainable growth of the sector are also analyzed, highlighting environmental concerns and emphasizing nontechnical issues such as business, regulatory, and ethical considerations. Additionally, we look at future intelligent flexible sensors. In proposing a comprehensive roadmap, we hope to steer research efforts towards common goals and to guide coordinated development strategies from disparate communities. Through such collaborative efforts, scientific breakthroughs can be made sooner and capitalized for the betterment of humanity.}, keywords = {bioelectronics, body area sensor networks, conformable sensors, flexible electronics, human-machine interfaces, mechanics engineering, soft materials, sustainable electronics, technology translation}, author = {Luo, Yifei and Abidian, Mohammad Reza and Ahn, Jong Hyun and Akinwande, Deji and Andrews, Anne M and Antonietti, Markus and Bao, Zhenan and Berggren, Magnus and Berkey, Christopher A and Bettinger, Christopher John and Chen, Jun and Chen, Peng and Cheng, Wenlong and Cheng, Xu and Choi, Seon Jin and Chortos, Alex and Dagdeviren, Canan and Dauskardt, Reinhold H and Di, Chong An and Dickey, Michael D and Duan, Xiangfeng and Facchetti, Antonio and Fan, Zhiyong and Fang, Yin and Feng, Jianyou and Feng, Xue and Gao, Huajian and Gao, Wei and Gong, Xiwen and Guo, Chuan Fei and Guo, Xiaojun and Hartel, Martin C and He, Zihan and Ho, John S and Hu, Youfan and Huang, Qiyao and Huang, Yu and Huo, Fengwei and Hussain, Muhammad M and Javey, Ali and Jeong, Unyong and Jiang, Chen and Jiang, Xingyu and Kang, Jiheong and Karnaushenko, Daniil and Khademhosseini, Ali and Kim, Dae Hyeong and Kim, Il Doo and Kireev, Dmitry and Kong, Lingxuan and Lee, Chengkuo and Lee, Nae Eung and Lee, Pooi See and Lee, Tae Woo and Li, Fengyu and Li, Jinxing and Liang, Cuiyuan and Lim, Chwee Teck and Lin, Yuanjing and Lipomi, Darren J and Liu, Jia and Liu, Kai and Liu, Nan and Liu, Ren and Liu, Yuxin and Liu, Yuxuan and Liu, Zhiyuan and Liu, Zhuangjian and Loh, Xian Jun and Lu, Nanshu and Lv, Zhisheng and Magdassi, Shlomo and Malliaras, George G and Matsuhisa, Naoji and Nathan, Arokia and Niu, Simiao and Pan, Jieming and Pang, Changhyun and Pei, Qibing and Peng, Huisheng and Qi, Dianpeng and Ren, Huaying and Rogers, John A and Rowe, Aaron and Schmidt, Oliver G and Sekitani, Tsuyoshi and Seo, Dae Gyo and Shen, Guozhen and Sheng, Xing and Shi, Qiongfeng and Someya, Takao and Song, Yanlin and Stavrinidou, Eleni and Su, Meng and Sun, Xuemei and Takei, Kuniharu and Tao, Xiao Ming and Tee, Benjamin C K and Thean, Aaron Voon Yew and Trung, Tran Quang and Wan, Changjin and Wang, Huiliang and Wang, Joseph and Wang, Ming and Wang, Sihong and Wang, Ting and Wang, Zhong Lin and Weiss, Paul S and Wen, Hanqi and Xu, Sheng and Xu, Tailin and Yan, Hongping and Yan, Xuzhou and Yang, Hui and Yang, Le and Yang, Shuaijian and Yin, Lan and Yu, Cunjiang and Yu, Guihua and Yu, Jing and Yu, Shu Hong and Yu, Xinge and Zamburg, Evgeny and Zhang, Haixia and Zhang, Xiangyu and Zhang, Xiaosheng and Zhang, Xueji and Zhang, Yihui and Zhang, Yu and Zhao, Siyuan and Zhao, Xuanhe and Zheng, Yuanjin and Zheng, Yu Qing and Zheng, Zijian and Zhou, Tao and Zhu, Bowen and Zhu, Ming and Zhu, Rong and Zhu, Yangzhi and Zhu, Yong and Zou, Guijin and Chen, Xiaodong} } @article {27001, title = {Tetra-Dentate Cycloaddition Catalysts for Rapid Photopolymerization Reactions}, journal = {Journal of Organic Chemistry}, volume = {88}, number = {9}, year = {2023}, month = {2022/05//}, pages = {5359 - 5367}, publisher = {American Chemical Society}, abstract = {[4 + 4] and [2 + 2] cycloadditions are unique reactions since they form and deform cycloadducts under irradiation due to their inherent reversible nature. Whereas promising for the field of recycling, these reactions usually suffer from two major shortcomings: long reaction durations (hours) and the requirement of high-intensity light (\~100 W/cm2), typically at a short wavelength (\<330 nm). We demonstrate several tetra-dentate catalysts that can overcome these fundamental limitations. Among them is a tin complex that enables 76\% conversion within only 2 min of irradiation at 395 nm, much faster than the known ruthenium-based catalyst, under irradiation with light intensity two orders of magnitude lower than that reported in the literature. Due to the short photopolymerization time, low intensity (27 mW/cm2), and long UV light (395 nm), this unique complex opens new avenues for recycling three-dimensional printing products based on photopolymerization of cycloaddition reactions.}, url = {https://pubs.acs.org/doi/10.1021/acs.joc.2c02941}, author = {Jarach, Natanel and Dodiuk, Hanna and Kenig, Samuel and Magdassi, Shlomo} } @article {Shukrun_Farrell2022-ad, title = {3D-printed complex-shaped chiral organosilica porous monoliths that display enantioselectivity}, journal = {Additive Manufacturing}, volume = {60}, year = {2022}, pages = {103265}, publisher = {Elsevier}, abstract = {We describe a new process for fabricating chiral organosilica 3D complex structures by combining digital light processing 3D printing with a sol-gel polycondensation process. The fabricated low-density objects have a high surface area with hierarchical porosity based on micropores resulting from the materials{\textquoteright} design, and on macropores in the structure resulting from the 3D printing design. Thus, several 3D objects having complex shapes were printed by the polycondensation of 3-acryloxypropyltrimethoxysilane (APTMS) and chiral silane monomers that were obtained by reacting (1R,2R)-cyclohexane-1,2-diamine or (1S,2S)-cyclohexane-1,2-diamine with (3-Isocyanatopropyl)triethoxysilane. The dual-function monomer APTMS enabled both localized photopolymerization and polycondensation. Printed gyroids, cubes, and disk-shaped chiral monoliths successfully revealed the enantioselective adsorption of tryptophan enantiomers. It was found that the macroscopic shape of the monolith affects the adsorption performance and its enantioselectivity. High enantioselectivity was obtained when the objects were formed from a chiral silane synthesized from (1R,2R)-cyclohexane-1,2-diamine: L-tryptophan was adsorbed \~{}10 fold higher than D-tryptophan. When the chiral object was fabricated using a chiral silane monomer prepared from (1S,2S)-cyclohexane-1,2-diamine, the enantioselectivity of the adsorption was reversed towards the D-tryptophan isomer. The new approach utilizes the 3D printing methodologies developed here for all-printed enantioselective separation columns; the printed macroporosity facilitates efficient flow, and the meso/microporous walls facilitate enantioselectivity.}, keywords = {3d printing, Chiral organosilica, Selective enantiomer adsorption, Sol-Gel, Stereolithography}, author = {Shukrun Farrell, Efrat and Siam, Reema and Moshkovitz, May Yam and Avnir, David and Abu-Reziq, Raed and Magdassi, Shlomo} } @article {Wang2022-sj, title = {4D Multimaterial Printing of Programmable and Selective Light-Activated Shape-Memory Structures with Embedded Gold Nanoparticles}, journal = {Advanced Materials Technologies}, volume = {7}, number = {5}, year = {2022}, month = {may}, pages = {2101058}, publisher = {John Wiley \& Sons, Ltd}, abstract = {4D printing is based on 3D printing of objects that can change their shape upon a proper triggering. Here, a novel approach is reported for fabricating programmable 3D printed objects composed of shape-memory polymers (SMPs) that are activated by light. The light activation of the movement and shape morphing are based on combining gold nanoparticles (AuNPs) as photothermal converters with acrylate-based printing compositions that form an SMP with tunable transition temperatures. The shape change of the printed objects is triggered by remote irradiation with a low-cost LED light at a wavelength specific to the surface plasmon resonance of the embedded AuNPs. The light is converted to heat which enables the shape transition when the temperature reaches the Tg of the polymer. Excellent SMP properties are achieved with shape fixity and recovery ratios over 95\%. This material composition and triggering approach enable fabricating programmable light-activated 3D printed structures with a dual transition while tuning the concentration. Furthermore, numerical simulations performed by finite-element analysis result in the excellent prediction of the shape-memory recovery. The presented approach can be applied in remotely controlling morphing, mainly for applications in the fields of actuators and soft robotics.}, keywords = {3d printing, 4D printing, actuators, Gold nanoparticles, light-activated shape-memory polymer, photothermal conversion, shape-memory polymers, soft robotics}, author = {Wang, Yu and Sachyani Keneth, Ela and Kamyshny, Alexander and Scalet, Giulia and Auricchio, Ferdinando and Magdassi, Shlomo} } @article {Goei2022-rg, title = {Conduction heat transfer switching using magnetic Fe x O y -decorated carbon-based nanomaterials}, journal = {European Physical Journal: Special Topics}, volume = {231}, number = {15}, year = {2022}, pages = {2963{\textendash}2971}, publisher = {Springer}, abstract = {Smart windows are used to minimize overall indoor energy consumption for thermal regulation through the modulation of radiant and conducted heat. While the control of thermal radiation can be done effectively by various technologies such as electrochromic, thermochromic, photochromic, etc., the modulation of heat conduction through smart windows remains a very challenging problem to be solved. The main obstacles are the lack of an effective conduction pathway within a double-glazed window and the need for a reliable active thermal switching mechanism. In this work, we introduce a novel idea for modulating heat conduction through a smart window by building thermally conductive pathways via coatings together with a heat transfer switching channel. The thermal switch uses various FexOy-decorated carbon-based nanomaterials that can be turned {\textquoteleft}ON{\textquoteright} or {\textquoteleft}OFF{\textquoteright}, thus modulating heat conduction through a window. By applying an external magnetic force, such carbon-based magnetic nanomaterials can be easily moved or aligned within the switching channel to modulate thermal conduction. In this work, FexOy-decorated carbon nanotubes (CNTs) and graphene are developed as a thermal conduction pathway, and a thermal heat switching mechanism is developed and proposed. The FexOy-decorated carbon nanotubes (CNTs) and graphene show excellent heat diffusivity as a thermal conduction pathway coating, through a 2 mm channel gap with a 40 mm distance from the heat source, whilst the thermal conduction switch proposed is shown to effectively modulate thermal conduction through it.}, keywords = {Atomic, Classical and Continuum Physics, Condensed Matter Physics, General, MATERIALS SCIENCE, Measurement Science and Instrumentation, Molecular, Optical and Plasma Physics, Physics}, author = {Goei, Ronn and Nguyen, Tam D and Zhang, Xiaoyu and Ong, Amanda Jiamin and Mandler, Daniel and Magdassi, Shlomo and Shi, Zhongqi and Tok, Alfred Iing Yoong} } @article {26997, title = {Fabrication Approaches of Soft Electronics}, journal = {ACS Applied Electronic Materials}, year = {2022}, month = {2022/03//}, publisher = {American Chemical Society}, abstract = {The use of conductive materials to be printed/embedded onto/within a polymeric matrix has gained increasing attention in the fabrication of next-generation soft electronics. In this review, we provide a comprehensive overview of the materials and approaches for the fabrication of 2D and 3D conductive structures while focusing on the importance of the compatibility between the particles{\textquoteright} shape, the polymeric matrix type, and the deposition method, along with the target application. The review presents a summary of the main conductive materials and the type of polymeric materials which were utilized for fabricating soft electronic devices that are bendable/twistable and stretchable. It is divided into two sections: Introduction section, which presents briefly conductive materials, polymeric matrix, and fabrication methods, and Fabrication section, presenting the main 6 approaches of fabrication. Each of the fabrication subsections presents the main recent reports in a detailed table. The review is concluded with an Outlook section, describing the current challenges in this field. Despite the progress in the fabrication of 2D bendable/twistable electronic devices toward industrial integration, there is still a need for tailoring and improving the durability and robustness of 3D stretchable electronic devices.}, keywords = {2D printed sensors, 3D printed sensors, printed electronics, soft electronics, soft sensors}, url = {https://pubs.acs.org/doi/full/10.1021/acsaelm.2c01728}, author = {Tan, Joel Ming Rui and Farraj, Yousef and Kamyshny, Alexander and Magdassi, Shlomo} } @article {Kamyshny2022-wg, title = {Inkjet Ink Formulations: Overview and Fundamentals}, journal = {Inkjet Printing in Industry}, year = {2022}, month = {aug}, pages = {93{\textendash}124}, publisher = {John Wiley \& Sons, Ltd}, keywords = {3d printing, conductive inks, digital printing, dyes, functional materials, ink formulation, inkjet inks, inkjet technology, pigments, printed electronics, surfactants, wetting}, author = {Kamyshny, Alexander and Sowade, Enrico and Magdassi, Shlomo} } @article {Pajor-Swierzy2022-du, title = {Metallic core-shell nanoparticles for conductive coatings and printing}, journal = {Advances in Colloid and Interface Science}, volume = {299}, year = {2022}, pages = {102578}, publisher = {Elsevier}, abstract = {The review is focused on bimetallic nanoparticles composed of a core formed by low-cost metal having high electrical conductivity, such as Cu and Ni, and a protective shell composed of stable to oxidation noble metal such as Ag or Au. We present the chemical and physical approaches for synthesis of such particles, as well as the combination of the two, the stability to oxidation of core-shell nanoparticles at various conditions, and the formulation of conductive compositions and their application in conductive coatings and printed electronics.}, keywords = {Conductive coatings, conductive inks, Metallic core-shell nanoparticles, Oxidation stability, printed electronics, Synthesis of core-shell nanoparticles}, author = {Pajor-{\'S}wierzy, Anna and Szczepanowicz, Krzysztof and Kamyshny, Alexander and Magdassi, Shlomo} } @article {Hao2022-gt, title = {Novel Transparent TiO2/AgNW-Si(NH2)/PET Hybrid Films for Flexible Smart Windows}, journal = {ACS Applied Materials and Interfaces}, volume = {14}, year = {2022}, publisher = {American Chemical Society}, abstract = {The application of flexible indium tin oxide (ITO)-free electrochromic devices (FCDs) has always been a research hotspot in flexible electronics. Recently, a silver nanowire (AgNW)-based transparent conductive film has raised great interest as an ITO-free substrate for FCDs. However, several challenges, such as the weak binding of AgNWs to the substrate, high junction resistance, and oxidation of AgNWs, remain. In this paper, a novel method for surface modification of AgNWs with N-aminoethyl-γ-aminopropyltrimethoxysilane [Si(NH2)] solution is proposed to enhance the bonding with the flexible substrates and the active materials, thereby inhibiting the delamination of AgNWs from the substrate and reducing the high junction resistance between nanowires. The TiO2/AgNW-Si(NH2)/poly(ethylene terephthalate) (PET) films show outstanding mechanical properties, of which the resistance remains almost unchanged after mechanical bending of 5000 cycles (R/R0 3.6\%) and repeated peeling off cycles with 3M tape 100 times (R/R0 6.0\%). In addition, we found that the oxygen-containing groups on the TiO2/AgNW-Si(NH2)/PET surface form hydrogen bonds with the TiO2 sol, resulting in tight contact between the TiO2 sol and the AgNWs, which prevents the AgNWs from oxidation. As a result, the TiO2/AgNW-Si(NH2)/PET film exhibited long-time aging (R/R0 4.9\% in the air for 100 days) stability. A FCD was constructed with the TiO2/AgNW-Si(NH2)/PET film, which showed excellent electrochromic performance (94\% retention) after 5000 bending cycles, indicating high stability and mechanical flexibility. These results present a promising solution to the transparent conductive films for flexible energy devices.}, keywords = {electrochromic devices, flexible smart windows, silver nanowire, titanium dioxide, tungsten trioxide}, author = {Hao, Tingting and Wang, Shen and Xu, Hongbo and Zhang, Xiang and Magdassi, Shlomo and Pan, Lei and Song, Ying and Li, Yao and Zhao, Jiupeng} } @article {Roig-Sanchez2022-bi, title = {One-step double network hydrogels of photocurable monomers and bacterial cellulose fibers}, journal = {Carbohydrate Polymers}, volume = {294}, year = {2022}, pages = {119778}, publisher = {Elsevier}, abstract = {Soft-tissue replacements are challenging due to the stringent compliance requirements for the implanted materials in terms of biocompatibility, durability, high wear resistance, low friction, and water content. Acrylate hydrogels are worth considering as soft tissue implants as they can be photocurable and sustain customized shapes through 3D bioprinting. However, acrylate-based hydrogels present weak mechanical properties and significant dimensional changes when immersed in liquids. To address these obstacles, we fabricated double network (DN) hydrogels composed of polyacrylic acid (PAA) and bacterial cellulose nanofibers (BCNFs) by one fast UV photopolymerization step. BCNFs/PAA hydrogels with a 0.5 wt\% BCNFs content present an increased stiffness and a lower, non-pH-dependent swelling than PAA hydrogels or PAA hydrogels with cellulose nanocrystals. Besides, BCNFs/PAA hydrogels are biocompatible and can be frozen/thawed. Those characteristics endorse these hybrid hydrogels as potential candidates for vascular and cartilage tissue implants.}, keywords = {Acrylic acid, Bacterial cellulose nanofibers, Biocompatible hydrogel, Double network}, author = {Roig-Sanchez, Soledad and Kam, Doron and Malandain, Nanthilde and Sachyani-Keneth, Ela and Shoseyov, Oded and Magdassi, Shlomo and Laromaine, Anna and Roig, Anna} } @article {Zan2022-ud, title = {Three-dimensional porous tungsten via DLP 3D printing from transparent ink}, journal = {Journal of Physics D: Applied Physics}, volume = {55}, number = {44}, year = {2022}, pages = {444004}, publisher = {IOP Publishing}, abstract = {Tungsten, an essential refractory metal material, has the characteristics of high melting and boiling points, high hardness, low expansion coefficient, and low vapor pressure. An indirect strategy to print three-dimensional (3D) refractory metal materials via digital light processing (DLP) followed by a post-treatment process was proposed. To analyze this strategy, a transparent ink with tungsten salts was developed, printed into a 3D precursor via DLP, and subsequently transited into 3D porous tungsten. The ultraviolet rheological properties and stability of the ink, transition process from the precursor to a 3D article, and the properties of the obtained 3D porous tungsten were investigated. This ink was preferable for DLP 3D printing, possessing consistency, stability and favorable absorbance at the wavelength of 385 nm. With increasing temperature, the weight of the tungsten salt in the 3D precursor decreased by 8.97\% and was transited to tungsten oxide below 460 {\textdegree}C, reduced to pure nano-sized tungsten at approximately 700 {\textdegree}C, and finally sintered into porous articles. The organics initially contributed to polymerization during printing as well as reduction as a carbon reducer after pyrolysis. The pore size distribution of porous tungsten is nonlinear or multimodal, depending on the final sintering temperature. At 1200 {\textdegree}C, two distinct peaks are observed in the pore distribution curves of the products. At 1400 {\textdegree}C, the small pore as a whole decreases from approximately 100-1000 nm. Correspondingly, the relative density of the samples increased with temperature.}, keywords = {3d printing, DLP, porous tungsten, transparent ink, tungsten}, author = {Zan, Xiuqi and Wang, Xinyu and Shi, Kaihua and Feng, Yan and Shu, Jun and Liao, Jun and Wang, Richu and Peng, Chaoqun and Magdassi, Shlomo and Wang, Xiaofeng} } @article {Wang2022-ib, title = {Two-dimensional mesoporous nitrogen-rich carbon nanosheets loaded with CeO2 nanoclusters as nanozymes for the electrochemical detection of superoxide anions in HepG2 cells}, journal = {Biosensors and Bioelectronics}, volume = {209}, year = {2022}, pages = {114229}, publisher = {Elsevier}, abstract = {Two-dimensional (2D) porous carbon-based composite nanosheets loaded with metal oxide nanoclusters are expected to be promising electrocatalysts for high-performance electrochemical sensors. However, for this complicated composite material, strict reaction conditions and complex synthesis steps limit its general application in electrochemical detection. Here we present a facile method to fabricate 2D mesoporous nitrogen-rich carbon nanosheets loaded with CeO2 nanoclusters (2D-mNC@CeO2), for fabricating superoxide anions (O2{\textbullet}-) electrochemical sensor. The method is based on block copolymers self-assembly and the affinity of polydopamine to metal ions to obtain organic-inorganic hybrid, which can be directly converted into 2D-mNC@CeO2 through carbonization strategy without structural deterioration. Characterizations demonstrate that the 2D-mNC@CeO2 owned the 2D N-doped carbon structure with an interlinked hierarchical mesoporous and the uniformly dispersed CeO2 nanoclusters on the surface. Benefitted from the unique structure, the 2D-mNC@CeO2 shortens electron transfer distance, enhances mass transfer efficiency, exposes numerous active sites, and obtain a high Ce3+/Ce4+ ratio for improving electrocatalytic performance. The 2D-mNC@CeO2/SPCEs sensors for O2{\textbullet}- detection has a detection limit of 0.179 μM (S/N = 3) and sensitivity of 401.4 μA cm-2 mM-1. The sensors can be applied to capture electrochemical signals of O2{\textbullet}- released from HepG2 cells, demonstrating the application potential of the sensors to monitor O2{\textbullet}- in biological fields.}, keywords = {Metal oxides nanoclusters, Nitrogen-rich carbon, Pore structure, Superoxide anions, Two-Dimensional}, author = {Wang, Zhenxing and Zhao, Hongli and Chen, Kaicha and Zhou, Fangfang and Magdassi, Shlomo and Lan, Minbo} } @article {Kam2022-on, title = {Wood Warping Composite by 3D Printing}, journal = {Polymers}, volume = {14}, number = {4}, year = {2022}, pages = {733}, publisher = {Multidisciplinary Digital Publishing Institute}, abstract = {Wood warping is a phenomenon known as a deformation in wood that occurs when changes in moisture content cause an unevenly volumetric change due to fiber orientation. Here we present an investigation of wood warped objects that were fabricated by 3D printing. Similar to natural wood warping, water evaporation causes volume decrease of the printed object, but in contrast, the printing pathway pattern and flow rate dictate the direction of the alignment and its intensity, all of which can be predesigned and affect the resulting structure after drying. The fabrication of the objects was performed by an extrusion-based 3D printing technique that enables the deposition of water-based inks into 3D objects. The printing ink was composed of 100\% wood-based materials, wood flour, and plant-extracted natural binders cellulose nanocrystals, and xyloglucan, without the need for any additional synthetic resins. Two archetypal structures were printed: cylindrical structure and helices. In the former, we identified a new length scale that gauges the effect of gravity on the shape. In the latter, the structure exhibited a shape transition analogous to the opening of a seedpod, quantitatively reproducing theoretical predictions. Together, by carefully tuning the flow rate and printing pathway, the morphology of the fully dried wooden objects can be controlled. Hence, it is possible to design the printing of wet objects that will form different final 3D structures.}, keywords = {3d printing, Nanocellulose, Shape programming, Wood}, author = {Kam, Doron and Levin, Ido and Kutner, Yinnon and Lanciano, Omri and Sharon, Eran and Shoseyov, Oded and Magdassi, Shlomo} } @article {Sachyani_Keneth2021-vf, title = {3D Printing Materials for Soft Robotics}, journal = {Advanced Materials}, volume = {33}, number = {19}, year = {2021}, month = {may}, pages = {2003387}, publisher = {John Wiley and Sons Inc}, abstract = {Soft robotics is a growing field of research, focusing on constructing motor-less robots from highly compliant materials, some are similar to those found in living organisms. Soft robotics has a high potential for applications in various fields such as soft grippers, actuators, and biomedical devices. 3D printing of soft robotics presents a novel and promising approach to form objects with complex structures, directly from a digital design. Here, recent developments in the field of materials for 3D printing of soft robotics are summarized, including high-performance flexible and stretchable materials, hydrogels, self-healing materials, and shape memory polymers, as well as fabrication of all-printed robots (multi-material printing, embedded electronics, untethered and autonomous robotics). The current challenges in the fabrication of 3D printed soft robotics, including the materials available and printing abilities, are presented and the recent activities addressing these challenges are also surveyed.}, keywords = {3d printing, actuators, self-healing, shape memory polymers, soft robotics}, author = {Sachyani Keneth, Ela and Kamyshny, Alexander and Totaro, Massimo and Beccai, Lucia and Magdassi, Shlomo} } @article {Kam2021-xi, title = {3D Printing of Cellulose Nanocrystal-Loaded Hydrogels through Rapid Fixation by Photopolymerization}, journal = {Langmuir}, volume = {37}, number = {21}, year = {2021}, pages = {6451{\textendash}6458}, publisher = {American Chemical Society}, abstract = {New ink compositions for direct ink writing (DIW) printing of hydrogels, combining superior rheological properties of cellulose nanocrystals (CNCs) and a water-compatible photoinitiator, are presented. Rapid fixation was achieved by photopolymerization induced immediately after the printing of each layer by 365 nm light for 5 s, which overcame the common height limitation in DIW printing of hydrogels, and enabled the fabrication of objects with a high aspect ratio. CNCs imparted a unique rheological behavior, which was expressed by orders of magnitude difference in viscosity between low and high shear rates and in rapid high shear recovery, without compromising ink printability. Compared to the literature, the presented printing compositions enable the use of low photoinitiator concentrations at a very short build time, 6.25 s/mm, and are also curable by 405 nm light, which is favorable for maintaining viability in bioinks.}, author = {Kam, Doron and Braner, Ariel and Abouzglo, Avi and Larush, Liraz and Chiappone, Annalisa and Shoseyov, Oded and Magdassi, Shlomo} } @article {Ge2021-dl, title = {3D printing of highly stretchable hydrogel with diverse UV curable polymers}, journal = {Science Advances}, volume = {7}, number = {2}, year = {2021}, month = {jan}, pages = {eaba4261}, publisher = {American Association for the Advancement of Science}, abstract = {Hydrogel-polymer hybrids have been widely used for various applications such as biomedical devices and flexible electronics. However, the current technologies constrain the geometries of hydrogel-polymer hybrid to laminates consisting of hydrogel with silicone rubbers. This greatly limits functionality and performance of hydrogel-polymer{\textendash}based devices and machines. Here, we report a simple yet versatile multimaterial 3D printing approach to fabricate complex hybrid 3D structures consisting of highly stretchable and high{\textendash}water content acrylamide-PEGDA (AP) hydrogels covalently bonded with diverse UV curable polymers. The hybrid structures are printed on a self-built DLP-based multimaterial 3D printer. We realize covalent bonding between AP hydrogel and other polymers through incomplete polymerization of AP hydrogel initiated by the water-soluble photoinitiator TPO nanoparticles. We demonstrate a few applications taking advantage of this approach. The proposed approach paves a new way to realize multifunctional soft devices and machines by bonding hydrogel with other polymers in 3D forms.}, author = {Ge, Qi and Chen, Zhe and Cheng, Jianxiang and Zhang, Biao and Zhang, Yuan Fang and Li, Honggeng and He, Xiangnan and Yuan, Chao and Liu, Ji and Magdassi, Shlomo and Qu, Shaoxing} } @article {Caprioli2021-ka, title = {3D-printed self-healing hydrogels via Digital Light Processing}, journal = {Nature Communications}, volume = {12}, number = {1}, year = {2021}, month = {dec}, pages = {1{\textendash}9}, publisher = {Nature Research}, abstract = {Self-healing hydrogels may mimic the behavior of living tissues, which can autonomously repair minor damages, and therefore have a high potential for application in biomedicine. So far, such hydrogels have been processed only via extrusion-based additive manufacturing technology, limited in freedom of design and resolution. Herein, we present 3D-printed hydrogel with self-healing ability, fabricated using only commercially available materials and a commercial Digital Light Processing printer. These hydrogels are based on a semi-interpenetrated polymeric network, enabling self-repair of the printed objects. The autonomous restoration occurs rapidly, at room temperature, and without any external trigger. After rejoining, the samples can withstand deformation and recovered 72\% of their initial strength after 12 hours. The proposed approach enables 3D printing of self-healing hydrogels objects with complex architecture, paving the way for future applications in diverse fields, ranging from soft robotics to energy storage.}, keywords = {Design, Gels and hydrogels, Polymers, synthesis and processing}, author = {Caprioli, Matteo and Roppolo, Ignazio and Chiappone, Annalisa and Larush, Liraz and Pirri, Candido Fabrizio and Magdassi, Shlomo} } @article {Farrell2021-kj, title = {3D-printing of ceramic aerogels by spatial photopolymerization}, journal = {Applied Materials Today}, volume = {24}, year = {2021}, month = {sep}, pages = {101083}, publisher = {Elsevier}, abstract = {Aerogels, the lightest solid material known, are low-density nanoporous solids that have found a wide range of applications such as thermal insulation, scaffolds for tissue engineering, catalysts supports, and micrometeorite collectors. Many types of materials have been used for their preparation, and ceramic/oxide aerogels are by far the most studied and applied family. Here we propose a new comprehensive solution to prepare these materials photochemically and fabricating them in highly complex shapes at all scales, from the macro scale down to the microns scale. The solution to these two challenges is linked, shown in the three photochemical approaches developed, allow unprecedented complexity in shape. The processes are mold irradiation, digital light processing (DLP) 3D printing, and a two-photon printing (TPP) process. The obtained 3D complex silicate objects display low density, high porosity, large surface area, and low thermal conductivity. The fabrication process also enables easy functionalization of the aerogels as inducing in them luminescence or making the printed object superhydrophobic by post printing process. The photochemical approach is ideal for the preparation of components of miniature devices, where low weight is a governing requirement.}, keywords = {3D-printing, Aerogel, ceramics, Photopolymrization, Sol-Gel, Superhydrophobicity}, author = {Farrell, Efrat Shukrun and Ganonyan, Nir and Cooperstein, Ido and Moshkovitz, May Yam and Amouyal, Yaron and Avnir, David and Magdassi, Shlomo} } @article {Xu2021-tf, title = {Anisotropic localized surface plasmon resonance of vanadium dioxide rods in flexible thermochromic film towards multifunctionality}, journal = {Solar Energy Materials and Solar Cells}, volume = {230}, year = {2021}, month = {sep}, pages = {111163}, publisher = {North-Holland}, abstract = {Plasmonic thermochromic films are promising for smart window applications. Hereby, we develop a flexible plasmonic thermochromic film towards multifunctionality. The double-layer film consists of a bottom layer of W/Mg co-doped vanadium dioxide (VO2) rods in a polyurethane acrylate matrix and a top layer of hollow silica spheres (HSSs). Based on the finite-difference time-domain (FDTD) method, we demonstrate for the first time, a transverse and a longitudinal mode of VO2 localized surface plasmonic resonance (LSPR) in near- and mid-infrared bands, respectively, and only the transverse mode contributes to the solar energy modulation performance. The film shows a luminous transmittance of 46.2\%, a solar energy modulation of 10.8\%, and a critical transition temperature of 36.9 {\textdegree}C. The HSSs overcoating enhances the surface hydrophilicity and thermal insulation, which give rise to more favored functionalities for windows.}, keywords = {Smart window, Solar modulation, Surface Plasmon Resonance, Thermal management, Thermochromics, VO2, Wettability}, author = {Xu, Qiyang and Ke, Yujie and Feng, Chengchen and Chen, Cong and Wen, Zuohao and Wang, Haoran and Sun, Miaoyang and Liu, Xinghai and Liu, Hai and Magdassi, Shlomo and Li, Houbin and Huang, Chi and Long, Yi} } @article {Sadhu2021-uw, title = {Dual Role of Cu-Chalcogenide as Hole-Transporting Layer and Interface Passivator for p{\textendash}i{\textendash}n Architecture Perovskite Solar Cell (Adv. Funct. Mater. 38/2021)}, journal = {Advanced Functional Materials}, volume = {31}, number = {38}, year = {2021}, month = {sep}, pages = {2170282}, publisher = {John Wiley \& Sons, Ltd}, abstract = {Hole-Transporting Layers In article number 2103807, Lydia Helena Wong and co-workers use Al-doped CuS as a hole transport layer (HTL) for perovskite solar cells. Here, it has been demonstrated that, due to the interaction between sulfur and lead, better perovskite crystallization takes place at the interface. Because of this improved interface quality, the sulfide-HTL based devices outperform the oxide HTL-based devices in terms of ambient stability.}, keywords = {defects, inorganic hole, interface passivation, sulfide, transport layers}, author = {Sadhu, Anupam and Rai, Monika and Salim, Teddy and Jin, Xin and Tan, Joel Ming Rui and Leow, Shin Woei and Ahmed, Mahmoud G and Magdassi, Shlomo and Mhaisalkar, Subodh G and Wong, Lydia Helena} } @article {Pendyala2021-lj, title = {Fabrication of Perovskite Solar Cells with Digital Control of Transparency by Inkjet Printing}, journal = {ACS Applied Materials and Interfaces}, volume = {13}, number = {26}, year = {2021}, month = {jul}, pages = {30524{\textendash}30532}, publisher = {American Chemical Society}, abstract = {Semitransparency is an attractive and important property in solar cells since it opens new possibilities in a variety of applications such as tandem cell configuration and building-integrated photovoltaics. Metal halide perovskite has the optimal properties to function as the light harvester in solar cells and can be made as a thin film, while its chemical composition can change its band gap. However, achieving high transparency usually compromises the solar cell{\textquoteright}s efficiency. Here we report on a unique approach to fabricating semitransparent perovskite solar cells that does not rely on their composition or their thickness. The approach is based on a scalable process, inkjet printing of arrays of transparent pillars, which are composed of inert photopolymerizable liquid compositions and are partly covered by the perovskite. This material can be printed at specific locations and array densities, thus providing a digital control of both the transparency and efficiency of the solar cells. The new semitransparent device structure shows 11.2\% efficiency with 24\% average transparency without a top metal contact. Further development including deposition of a transparent contact enabled the fabrication of fully semitransparent devices with an efficiency of 10.6\% and average transparency of 19\%.}, keywords = {high efficiency, inkjet printing, perovskite solar cells, polymer-ink pillars, semitransparent}, author = {Pendyala, Naresh Kumar and Magdassi, Shlomo and Etgar, Lioz} } @article {Ke2021-kv, title = {Manipulating atomic defects in plasmonic vanadium dioxide for superior solar and thermal management}, journal = {Materials Horizons}, volume = {8}, number = {6}, year = {2021}, month = {jun}, pages = {1700{\textendash}1710}, publisher = {Royal Society of Chemistry (RSC)}, abstract = {Vanadium dioxide (VO2) is a unique active plasmonic material due to its intrinsic metal-insulator transition, remaining less explored. Herein, we pioneer a method to tailor the VO2 surface plasmon by manipulating its atomic defects and establish a universal quantitative understanding based on seven representative defective VO2 systems. Record high tunability is achieved for the localized surface plasmon resonance (LSPR) energy (0.66-1.16 eV) and transition temperature range (40-100 {\textdegree}C). The Drude model and density functional theory reveal that the charge of cations plays a dominant role in the numbers of valence electrons to determine the free electron concentration. We further demonstrate their superior performances in extensive unconventional plasmonic applications including energy-saving smart windows, wearable camouflage devices, and encryption inks. This journal is}, author = {Ke, Yujie and Zhang, Bikun and Wang, Tao and Zhong, Yaxu and Vu, Tuan Duc and Wang, Shancheng and Liu, Yang and Magdassi, Shlomo and Ye, Xingchen and Zhao, Dongyuan and Xiong, Qihua and Sun, Zhimei and Long, Yi} } @article {Rai2021-vn, title = {Multimodal Approach towards Large Area Fully Semitransparent Perovskite Solar Module}, journal = {Advanced Energy Materials}, volume = {11}, number = {45}, year = {2021}, month = {dec}, pages = {2102276}, publisher = {John Wiley \& Sons, Ltd}, abstract = {Significant advancements in the perovskite solar cells/modules (PSCs/PSMs) toward better operational stability and large area scalability have recently been reported. However, semitransparent (ST), high efficiency, and large area PSMs are still not well explored and require attention to realize their application in building-integrated photovoltaics (BIPV). This work employs multiple synergistic strategies to improve the quality and stability of the ST perovskite film while ensuring high transparency. Europium ions, doped in the perovskite, are found to suppress the generation of detrimental species like elemental Pb and I, resulting in higher atmospheric stability. The effect of the top transparent contact is designed to obtain an average visible transparency (AVT) of >20\% for full device and a green colored hue. Lastly, the lower current density due to the thinner ST absorber is enhanced by the application of a down-converting phosphor material which harvests low energy photons and inhibits UV-induced degradation. This multimodal approach renders a power conversion efficiency of 12\% under dim light conditions and 9.5\% under 1 sun illumination, respectively, on 21 cm2 ST-PSM.}, keywords = {defects, downconversion, modules, operational stability, semitransparent}, author = {Rai, Monika and Yuan, Zhengtian and Sadhu, Anupam and Leow, Shin Woei and Etgar, Lioz and Magdassi, Shlomo and Wong, Lydia Helena} } @article {Goei2021-mn, title = {Nd-Nb Co-doped SnO2/α-WO3Electrochromic Materials: Enhanced Stability and Switching Properties}, journal = {ACS Omega}, volume = {6}, number = {40}, year = {2021}, month = {oct}, pages = {26251{\textendash}26261}, publisher = {American Chemical Society}, abstract = {The fabrication of Nd-Nb co-doped SnO2/α-WO3 electrochromic (EC) materials for smart window applications is presented in the present paper. Nb is a good dopant candidate for ECs owing to its ability to introduce active sites on the surface of α-WO3 without causing much lattice strain due to the similar ionic radius of Nb5+ and W6+. These active sites introduce more channels for charge insertion or removal during redox reactions, improving the overall EC performance. However, Nb suffers from prolonged utilization due to the Li+ ions trapped within the ECs. By coupling Nd with Nb, the co-dopants would transfer their excess electrons to SnO2, improving the electronic conductivity and easing the insertion and extraction of Li+ cations from the ECs. The enhanced Nd-Nb co-doped SnO2/α-WO3 exhibited excellent visible light transmission (90\% transmittance), high near-infrared (NIR) contrast (60\% NIR modulation), rapid switching time (\~{}1 s), and excellent stability (>65\% of NIR modulation was retained after repeated electrochemical cycles). The mechanism of enhanced EC performance was also investigated. The novel combination of Nd-Nb co-doped SnO2/α-WO3 presented in this work demonstrates an excellent candidate material for smart window applications to be used in green buildings.}, author = {Goei, Ronn and Ong, Amanda Jiamin and Tan, Jun Hao and Loke, Jie Yi and Lua, Shun Kuang and Mandler, Daniel and Magdassi, Shlomo and Yoong Tok, Alfred Iing} } @article {Goei2021-dt, title = {Novel Nd{\textendash}Mo co-doped SnO2/α-WO3 electrochromic materials (ECs) for enhanced smart window performance}, journal = {Ceramics International}, volume = {47}, number = {13}, year = {2021}, pages = {18433{\textendash}18442}, publisher = {Elsevier Ltd}, abstract = {In an urbanized city, about a third of total electrical consumption is allocated for indoor lighting and air conditioning system in residential and commercial buildings. The majority of the worldwide energy generation comes from burning of non-renewable fossil fuel which is not sustainable in the long run. The use of smart windows technology may catalyze the effort to reduce energy consumption of building and houses. More than 50\% of heat entering a building through windows originate from the solar radiation in the near infrared (NIR) region. This candidate smart window material must exhibit dual-band (visible and NIR) modulation that allows selective modulation of NIR heat without affecting visible light transmission. A good electrochromic material in this respect should possess high visible light transmission, high NIR modulation, fast switching between colored and bleached state, and good stability over prolonged usage. In this work, we propose a novel Nd{\textendash}Mo co-doped SnO2/α-WO3 electrochromic materials (ECs). As compared to the traditional SnO2/α-WO3 ECs, our Nd{\textendash}Mo co-doped SnO2/α-WO3 ECs exhibits up to 90\% visible light transparency (at λ = 600 nm), 62\% NIR modulation (at wavelength 1200 nm), high coloration efficiency ($\sim$200 cm2 C-1), fast switching time with only 31\% electrochromic performance drop (vs 59\% of undoped sample) after up to 1000 reversible cyclic test. The enhanced electrochromic performance comes from the presence of Nd{\textendash}Mo co-dopants that limit the trapping of Li + ion within α-WO3 framework, reduce the extent of crystallization of α-WO3 layer and enhancement of the electronic conductivity by transferring their excess electron to the conduction band of the SnO2. To the best of the authors{\textquoteright} knowledge, the present composition of ECs offers one of the better candidate materials for electrochromic to be used as thermal management layers on smart windows application.}, keywords = {Electrochromic smart window, Energy efficiency green building, Functional nano-photonic crystals, Near infrared heat modulation, Neodymium{\textendash}molybdenum co-doped SnO2/α-WO3}, author = {Goei, Ronn and Ong, Amanda Jiamin and Hao, Tan Jun and Yi, Loke Jie and Kuang, Lua Shun and Mandler, Daniel and Magdassi, Shlomo and Yoong Tok, Alfred Iing} } @article {Rosental2021-xy, title = {Particle-free compositions for printing dense 3D ceramic structures by digital light processing}, journal = {Virtual and Physical Prototyping}, volume = {16}, number = {3}, year = {2021}, month = {may}, pages = {255{\textendash}266}, publisher = {Informa UK Limited}, abstract = {UV-curable particle-free ceramic compositions for stereolithography-based 3D printing technologies present a promising alternative to the commonly used particle-based compositions. So far, such compositions were mainly based on solutions of pre-ceramic polymers which limit their applications to silicon-containing materials. However, the application of particle-free inks for the fabrication of other ceramic materials, in particular dense polycrystalline ones, is very little explored. We present a new and general fabrication approach based on all-solution compositions, by combining sol{\textendash}gel chemistry and photopolymerization, for obtaining dense 3D ceramic structures by DLP printing. The process is demonstrated here for the fabrication of barium titanate (BaTiO3). By using chelating solvent and monomer, a stable UV-curable solution is obtained. An aging period of 8{\textendash}14 days was crucial for obtaining dense ceramic objects without any secondary phases. The heat treatment was found to affect the microstructure, density and hardness of the resulting ceramics. The presented process enables obtaining objects free of carbon materials, having a density as high as 98\% of the theoretical value, and a hardness of 4.3 GPa.}, keywords = {3d printing, additive manufacturing, barium titanate, ceramics, Digital Light Processing (DLP), photopolymerization, sol{\textendash}gel}, author = {Rosental, Tamar and Mizrahi, Sapir and Kamyshny, Alexander and Magdassi, Shlomo} } @article {Stassi2021-ix, title = {Reaching silicon-based NEMS performances with 3D printed nanomechanical resonators}, journal = {Nature Communications}, volume = {12}, number = {1}, year = {2021}, month = {oct}, pages = {1{\textendash}9}, publisher = {Nature Publishing Group}, abstract = {The extreme miniaturization in NEMS resonators offers the possibility to reach an unprecedented resolution in high-performance mass sensing. These very low limits of detection are related to the combination of two factors: a small resonator mass and a high quality factor. The main drawback of NEMS is represented by the highly complex, multi-steps, and expensive fabrication processes. Several alternatives fabrication processes have been exploited, but they are still limited to MEMS range and very low-quality factor. Here we report the fabrication of rigid NEMS resonators with high-quality factors by a 3D printing approach. After a thermal step, we reach complex geometry printed devices composed of ceramic structures with high Young{\textquoteright}s modulus and low damping showing performances in line with silicon-based NEMS resonators ones. We demonstrate the possibility of rapid fabrication of NEMS devices that present an effective alternative to semiconducting resonators as highly sensitive mass and force sensors.}, keywords = {mechanical properties, NEMS, Sensors, Sensors and biosensors, Structural properties}, author = {Stassi, Stefano and Cooperstein, Ido and Tortello, Mauro and Pirri, Candido Fabrizio and Magdassi, Shlomo and Ricciardi, Carlo} } @article {Leow2021-vr, title = {Solution-Processed Semitransparent CZTS Thin-Film Solar Cells via Cation Substitution and Rapid Thermal Annealing}, journal = {Solar RRL}, volume = {5}, number = {7}, year = {2021}, pages = {2100131}, publisher = {John Wiley and Sons Inc}, abstract = {Semitransparent solar cells are able to capitalize on land scarcity in urban environments by co-opting windows and glass structures as power generators, thereby expanding the capacity of photovoltaics to meet energy needs. To be successful, devices must be efficient, possess good visual transparency, long-term stability, and low cost. Copper zinc tin sulfide is a promising thin-film material that consists of earth-abundant elements. For optical transparency, the usual molybdenum back contact is replaced with a transparent conducting oxide (TCO). However, due to subsequent high-temperature annealing, the TCO degrades, losing conductivity, or forms a poor interface with CZTS. Lower temperatures mitigate this issue but hinder grain growth in CZTS films. Herein, cadmium substitution and silver and sodium doping are used to aid grain growth and improve film quality at lower annealing temperatures. Thin molybdenum is sputtered on TCO to help improve the interface transition postannealing by conversion to MoS2. Rapid thermal processing is used to minimize high-temperature exposure time to preserve the TCO. With these methods, a semitransparent device with a front illumination efficiency of 2.96\% is demonstrated.}, keywords = {cation substitutions, copper zinc tin sulfides, rapid thermal annealing, semitransparent solar cells, solution processes}, author = {Leow, Shin Woei and Li, Wenjie and Tan, Joel Ming Rui and Venkataraj, Selvaraj and Tunuguntla, Venkatesh and Zhang, Mengyuan and Magdassi, Shlomo and Wong, Lydia Helena} } @article {Zhou2020-xi, title = {3D Printed Smart Windows for Adaptive Solar Modulations}, journal = {Advanced Optical Materials}, volume = {8}, number = {11}, year = {2020}, month = {jun}, pages = {2000013}, publisher = {Wiley-VCH Verlag}, abstract = {Vanadium dioxide (VO2) based thermochromic smart window is considered as the most promising approach for economizing building energy consumption. However, the high phase transition temperature (τc), low luminous transmission (Tlum), and solar modulation (ΔTsol) impose an invertible challenge for commercialization. Currently, smart window research surprisingly assumes that the sunlight radiates in one direction which is obviously not valid as most regions receive solar radiation at various angles in different seasons. For the first time, solar elevation angle is considered and 3D printing technology is employed to fabricate tilted microstructures for modulating solar transmission dynamically. To maximize energy-saving performance, the architecture of the structures (tilt, thickness, spacing, and width) and tungsten (W) doped VO2 can be custom-designed according to the solar elevation angle variation at the midday between seasons and tackle the issue of compromised Tlum and ΔTsol with W-doping. The energy consumption simulations in different cities prove the efficiency of such dynamic modulation. This first attempt to adaptively regulate the solar modulation by considering the solar elevation angle together with one of the best reported thermochromic properties (τc = 40 {\textdegree}C, Tlum(average) = 40.8\%, ΔTsol = 23.3\%) may open a new era of real-world-scenario smart window research.}, keywords = {3d printing, energy conservation, smart windows, thermochromic materials, Vanadium Dioxide}, author = {Zhou, Chengzhi and Li, Dan and Tan, Yutong and Ke, Yujie and Wang, Shancheng and Zhou, Yang and Liu, Guowei and Wu, Shaofan and Peng, Jinqing and Li, Anran and Li, Shuzhou and Chan, Siew Hua and Magdassi, Shlomo and Long, Yi} } @article {Shukrun_Farrell2020-uu, title = {3D Printing of Ordered Mesoporous Silica Complex Structures}, journal = {Nano Letters}, volume = {20}, number = {9}, year = {2020}, month = {sep}, pages = {6598{\textendash}6605}, publisher = {NLM (Medline)}, abstract = {Ordered mesoporous silica materials gain high interest because of their potential applications in catalysis, selective adsorption, separation, and controlled drug release. Due to their morphological characteristics, mainly the tunable, ordered nanometric pores, they can be utilized as supporting hosts for confined chemical reactions. Applications of these materials, however, are limited by structural design. Here, we present a new approach for the 3D printing of complex geometry silica objects with an ordered mesoporous structure by stereolithography. The process uses photocurable liquid compositions that contain a structure-directing agent, silica precursors, and elastomer-forming monomers that, after printing and calcination, form porous silica monoliths. The objects have extremely high surface area, 1900 m2/g, and very low density and are thermally and chemically stable. This work enables the formation of ordered porous objects having complex geometries that can be utilized in applications in both the industry and academia, overcoming the structural limitations associated with traditional processing methods.}, keywords = {3d printing, DPL, ordered mesoporous silica, Porous materials, Sol-Gel}, author = {Shukrun Farrell, Efrat and Schilt, Yaelle and Moshkovitz, May Yam and Levi-Kalisman, Yael and Raviv, Uri and Magdassi, Shlomo} } @article {Dong2020-ym, title = {4D Printed Hydrogels: 4D Printed Hydrogels: Fabrication, Materials, and Applications (Adv. Mater. Technol. 6/2020)}, journal = {Advanced Materials Technologies}, volume = {5}, number = {6}, year = {2020}, month = {jun}, pages = {2070037}, publisher = {Wiley}, keywords = {3d printing, 4D printing, additive manufacturing, responsive hydrogels, stimuli}, author = {Dong, Yuting and Wang, Shancheng and Ke, Yujie and Ding, Liucheng and Zeng, Xianting and Magdassi, Shlomo and Long, Yi} } @article {Dong2020-vy, title = {4D Printed Hydrogels: Fabrication, Materials, and Applications}, journal = {Advanced Materials Technologies}, volume = {5}, number = {6}, year = {2020}, month = {jun}, pages = {2000034}, publisher = {Wiley-Blackwell}, abstract = {4D printed objects are 3D printed structures whose shape, property, and functionality are able to self-transform when exposed to a predetermined stimulus. The emerging field of 4D printing has attracted wide interest from both academia and industry since first introduced in 2013. Stimuli-responsive hydrogels have become a competitive and versatile group of materials for 4D printed devices due to their good deformability, promising biocompatibility, simple manufacturing, and low cost. This review aims to provide a summary of the current progress of hydrogel-based 4D printed objects and devices based on their fabrication techniques, materials, and applications. Herein, presented are: the characteristics of different additive manufacturing methods such as direct ink writing, fused deposition modeling, and stereolithography; the properties of various stimuli-responsive hydrogels such as poly(N-isopropylacrylamide) and poly(N,N-dimethylacrylamide), alginate, etc.; and diverse applications of 4D printed hydrogels such as actuators, cellular scaffolds, and drug release devices. Opportunities and challenges for 4D printed hydrogels are discussed and prospects for future development are elaborated.}, keywords = {3d printing, 4D printing, additive manufacturing, stimuli-responsive hydrogels}, author = {Dong, Yuting and Wang, Shancheng and Ke, Yujie and Ding, Liucheng and Zeng, Xianting and Magdassi, Shlomo and Long, Yi} } @article {Zhou2020-iy, title = {All 3D-printed stretchable piezoelectric nanogenerator with non-protruding kirigami structure}, journal = {Nano Energy}, volume = {72}, year = {2020}, month = {jun}, pages = {104676}, publisher = {Elsevier Ltd}, abstract = {With the advancement of wearable electronics, stretchable energy harvesters are attractive to reduce the need of frequent charging of wearable devices. In this work, a stretchable kirigami piezoelectric nanogenerator (PENG) based on barium titanate (BaTiO3) nanoparticles, Poly(vinylidene fluoride-co-trifluoroethylene) (P(VDF-TrFE)) matrix, and silver flakes-based electrode is fabricated in an all-3D printable process suited for additive manufacturing. The 3D printable extrusion ink is formulated for facile solvent evaporation during layer formation to enable heterogenous multilayer stacking. A well-designed modified T-joint-cut kirigami structure is realized to attain a non-protruding, high structural stretchability performance, overcoming the out-of-plane displacement of the typical kirigami structure and therefore enabling the pressing-mode of a kirigami-structured PENG. This PENG can be stretched to more than 300\% strain, which shows a great potential for application in wearable electronic systems. Furthermore, a self-powered gait sensor is demonstrated using this PENG.}, keywords = {3d printing, Direct-write printing, Gait analysis, Kirigami, Piezoelectric nanogenerator, Stretchable}, author = {Zhou, Xinran and Parida, Kaushik and Halevi, Oded and Liu, Yizhi and Xiong, Jiaqing and Magdassi, Shlomo and Lee, Pooi See} } @article {Ke2020-rg, title = {Cephalopod-inspired versatile design based on plasmonic VO2 nanoparticle for energy-efficient mechano-thermochromic windows}, journal = {Nano Energy}, volume = {73}, year = {2020}, month = {jul}, pages = {104785}, publisher = {Elsevier Ltd}, abstract = {Privacy and energy-saving are key functionalities for next-generation smart windows, while to achieve them independently on a window is challenging. Inspired by the cephalopod skin, we have developed a versatile thermo- and mechano-chromic design to overcome such challenge and reveal the mechanism via both experiments and simulations. The design is facile with good scalability, consisted of well-dispersed vanadium dioxide (VO2) nanoparticles (NPs) with temperature-dependent localized surface plasmon resonance (LSPR) in transparent elastomers with dynamic micro wrinkles. While maintaining a fixed solar energy modulation of (ΔTsol), the design can dynamically control visible transmittance (Tvib) from 60\% to 17\%, adding a new dimension to VO2-based smart windows. We prove that the optical modulation relies on the microtexture-induced broadband diffraction and the plasmon-enhanced near-infrared absorbance of VO2 NPs. We further present a series of modified designs towards additional functionalities. This work opens an avenue for independent dual-mode windows and it may inspire development from fundamental material, optic, and mechanical science to energy-related applications.}, keywords = {Bio-inspired, Localized surface plasmon resonance, Mechanochromic, Smart window, Solar energy modulation, Wrinkle}, author = {Ke, Yujie and Zhang, Qiuting and Wang, Tao and Wang, Shancheng and Li, Na and Lin, Gaojian and Liu, Xinghai and Dai, Zhendong and Yan, Jing and Yin, Jie and Magdassi, Shlomo and Zhao, Dongyuan and Long, Yi} } @article {Vinetsky2020-yk, title = {Cnt-based solar thermal coatings: Absorptance vs. emittance}, journal = {Coatings}, volume = {10}, number = {11}, year = {2020}, pages = {1{\textendash}12}, publisher = {MDPI AG}, abstract = {A novel approach for fabricating selective absorbing coatings based on carbon nanotubes (CNTs) for mid-temperature solar{\textendash}thermal application is presented. The developed formulations are dispersions of CNTs in water or solvents. Being coated on stainless steel (SS) by spraying, these formulations provide good characteristics of solar absorptance. The effect of CNT concentration and the type of the binder and its ratios to the CNT were investigated. Coatings based on water dispersions give higher adsorption, but solvent-based coatings enable achieving lower emittance. Interestingly, the binder was found to be responsible for the high emittance, yet, it is essential for obtaining good adhesion to the SS substrate. The best performance of the coatings requires adjusting the concentration of the CNTs and their ratio to the binder to obtain the highest absorptance with excellent adhesion; high absorptance is obtained at high CNT concentration, while good adhesion requires a minimum ratio between the binder/CNT; however, increasing the binder concentration increases the emissivity. The best coatings have an absorptance of ca. 90\% with an emittance of ca. 0.3 and excellent adhesion to stainless steel.}, keywords = {Absorptance, adhesion, Binder, Carbon nanotubes (CNTs), Dispersion, Emittance, Selectivity, Solar thermal coating}, author = {Vinetsky, Yelena and Jambu, Jyothi and Mandler, Daniel and Magdassi, Shlomo} } @article {Nguyen2020-qh, title = {Electrochromic smart glass coating on functional nano-frameworks for effective building energy conservation}, journal = {Materials Today Energy}, volume = {18}, year = {2020}, month = {dec}, pages = {100496}, publisher = {Elsevier Ltd}, abstract = {Electrochromic smart windows, with the ability to dynamically modulate thermal radiation transmission, are the key technologies to preserve energy expenditure for indoor lighting and air-conditioning. Despite receiving numerous exertions on design and fabrication technique, smart windows have rarely been commercially employed in the building industry due to unreliable lifetime, poor heat switching performance as well as high fabrication costs. Herein, we introduce a novel strategy in designing smart glass device, which focuses on the development of functionalized MxSnO2 nano-frameworks for electrochromic coating. The hybrid structures based on such nano-frameworks do not change the amorphous nature of electrodeposited tungsten trioxide (ɑ-WO3) layer and therefore are able to preserve its excellent electrochromic properties. Novel hybrid nano-structures of MxSnO2/ɑ-WO3 are able to encompass all desired features of a smart window, including the ability to block more than 95\% NIR radiation in colored state while still allow about 80\% of visible light transmittance in bleached state, rapid electro-optical response time of about 10 s and improved coloration efficiencies. More importantly, the advanced MxSnO2/ɑ-WO3 nanostructures can also retain their structure and functionality for at least 1000 switching cycles due to the enhanced binding strength. In addition, the synthetic recipe of such functionalized nano-framework is facile and cost-effective, enabling the fabrication on any template type and size.}, keywords = {Functionalized nanophotonic crystals, Phase changes, Scalable fabrication, Smart glass coating, Thermal radiation modulation}, author = {Nguyen, Tam Duy and Yeo, Loo Pin and Ong, Amanda Jiamin and Zhiwei, Wang and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred Iing Yoong} } @article {Nguyen2020-tt, title = {Fabrication and characterization of graphene quantum dots thin film for reducing cross-sectional heat transfer through smart window}, journal = {Materials Research Bulletin}, volume = {127}, year = {2020}, month = {jul}, pages = {110861}, publisher = {Pergamon}, abstract = {Graphene and its derivatives have been reported as materials with excellent electrical and thermal conductivity, allowing for various promising applications. In particular, the large-scale surface coating of graphene-based materials can be employed to minimize cross-sectional heat transfer through the glass window. This study introduces a facile and cost-effective method to fabricate graphene quantum dots (GQDs) thin film on Fluorine-doped Tin Oxide (FTO) glass via casting of the GQDs dispersion and stabilizing with poly-vinyl-pyrrolidone (PVP). The thin film possesses excellent optical properties of GQDs and allows more than 80 \% of visible transmittance. The presence of the GQDs thin film shows effective reduction in the cross-sectional thermal diffusivity of FTO glass, from 0.55 mm2/s to zero when measured with laser flash over a 4-second period. This low cost and eco-friendly GQDs thin film will be a promising material for heat management in smart window applications.}, keywords = {Cross-Sectional heat transfer, Graphene quantum dots, Poly-Vinyl-Pyrrolidone, Smart window, Visible transmittance}, author = {Nguyen, Tam D and Yeo, Loo Pin and Si Yang, Kiw and Chiew Kei, Tan and Wang, Zhiwei and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred Iing Yoong} } @article {Nowogrodski2020-cd, title = {Fabrication of second skin from keratin and melanin}, journal = {Polymers}, volume = {12}, number = {11}, year = {2020}, month = {nov}, pages = {1{\textendash}13}, publisher = {MDPI AG}, abstract = {Second skin is a topically applied, skin-conforming material that mimics human skin properties and bears potential cosmetic and e-skin applications. To successfully integrate with natural skin, characteristics such as color and skin features must be matched. In this work, we prepared bio-based skin-like films from cross-linked keratin/melanin films (KMFs), using a simple fabrication method and non-toxic materials. The films retained their stability in aqueous solutions, showed skin-like mechanical properties, and were homogenous and handleable, with non-granular surfaces and a notable cross-linked structure as determined by attenuated total reflection (ATR). In addition, the combination of keratin and melanin allowed for adjustable tones similar to those of natural human skin. Furthermore, KMFs showed light transmittance and UV-blocking (up to 99\%) as a function of melanin content. Finally, keratin/melanin ink (KMI) was used to inkjet-print high-resolution images with natural skin pigmented features. The KMFs and KMI may offer advanced solutions as e-skin or cosmetics platforms.}, keywords = {Bio-based, Cross-linking, Films, Keratin, Melanin, Second skin, Wearable skin}, author = {Nowogrodski, Chen and Simon, Ido and Magdassi, Shlomo and Shoseyov, Oded} } @article {Bera2020-wb, title = {Fabrication of Self-Cleaning CNT-Based Near-Perfect Solar Absorber Coating for Non-Evacuated Concentrated Solar Power Applications}, journal = {Energy Technology}, volume = {8}, number = {12}, year = {2020}, month = {dec}, pages = {2000699}, publisher = {Wiley-VCH Verlag}, abstract = {A near-perfect black solar absorber made of carbon nanotubes (CNTs) prepared by a low-cost wet-deposition method on a reflective metal surface for mid-temperature non-evacuated concentrated solar power (CSP) applications is demonstrated. The dispersed CNTs in an alumina{\textendash}silica matrix exhibit an absorptance of 0.985 in the entire solar spectrum and emittance of 0.90 in the infrared (IR) region. The coating shows high durability and is super-hydrophilic (0{\textdegree} contact angle) after plasma treatment, without affecting the solar absorptance and excellent coating adhesion. The efficiency of the coating is evaluated by analytical models, which implies that it has higher efficiency at low temperature and at a high solar concentration ratio than that of previously reported selective coatings.}, keywords = {Absorptance, carbon nanotubes, concentrated solar power, solar absorber coatings, solar-thermal coatings}, author = {Bera, Raj Kumar and Binyamin, Yaniv and Frantz, Cathy and Uhlig, Ralf and Magdassi, Shlomo and Mandler, Daniel} } @article {Kaur2020-uq, title = {Fabrication of superhydrophobic 3D objects by Digital Light Processing}, journal = {Additive Manufacturing}, volume = {36}, year = {2020}, month = {dec}, pages = {101669}, publisher = {Elsevier B.V.}, abstract = {The 3D printing process enables to print objects having various functionalities at pre-designed locations in the object. Hereby, we report on the printing of superhydrophobic objects composed of patterns of micropillars. Superhydrophobicity is an important property of surfaces that has applications in various fields such as self-cleaning, drag reduction, increased buoyancy, and air conditioning. Most existing methods for the fabrication of superhydrophobic surfaces are complicated and time-consuming. Here, we performed a simple and cost-effective process for the fabrication of superhydrophobic (SH) objects by Digital Light Processing (DLP) 3D printing. To the best of our knowledge, this is the first study that has used DLP 3D printing to fabricate SH 3D objects without further coating process. We designed a novel ink, which contained non-fluorinated acrylates and Hydrophobic Fumed Silica (HFS). We studied the effects of HFS concentration and pillar-array design for imparting the SH property, which was measured in terms of the contact and rolling angle of water droplets on the surface. As proof of the concept of increased buoyancy by superhydrophobicity, we demonstrated the floatation of the printed SH objects in comparison to their non-SH counterparts even after forcefully submerging them into water.}, keywords = {3d printing, contact angle, DLP, Micropillars, Rolling Angle, Superhydrophobicity}, author = {Kaur, Gurpreet and Marmur, Abraham and Magdassi, Shlomo} } @article {Wang2020-px, title = {High-complexity WO3-based catalyst with multi-catalytic species via 3D printing}, journal = {Catalysts}, volume = {10}, number = {8}, year = {2020}, month = {jul}, pages = {1{\textendash}11}, publisher = {MDPI AG}, abstract = {Three-dimensional (3D) printing has recently been introduced into the field of chemistry as an enabling tool employed to perform reactions, but so far, its use has been limited due to material and structural constraints. We have developed a new approach for fabricating 3D catalysts with high-complexity features for chemical reactions via digital light processing printing (DLP). PtO2-WO3 heterogeneous catalysts with complex shapes were directly fabricated from a clear solution, composed of photo-curable organic monomers, photoinitiators, and metallic salts. The 3D-printed catalysts were tested for the hydrogenation of alkynes and nitrobenzene, and displayed excellent reactivity in these catalytic transformations. Furthermore, to demonstrate the versatility of this approach and prove the concept of multifunctional reactors, a tungsten oxide-based tube consisting of three orderly sections containing platinum, rhodium, and palladium was 3D printed.}, keywords = {3d printing, Catalyst, Chemical reaction, digital light processing, Multi-catalytic species, PtO2, WO3}, author = {Wang, Xiaofeng and Guo, Wei and Abu-Reziq, Raed and Magdassi, Shlomo} } @article {Keneth2020-gh, title = {Multi-material 3D printed shape memory polymer with tunable melting and glass transition temperature activated by heat or light}, journal = {Polymers}, volume = {12}, number = {3}, year = {2020}, month = {mar}, pages = {710}, publisher = {Multidisciplinary Digital Publishing Institute}, abstract = {Shape memory polymers are attractive smart materials that have many practical applications and academic interest. Three-dimensional (3D) printable shape memory polymers are of great importance for the fabrication of soft robotic devices due to their ability to build complex 3D structures with desired shapes. We present a 3D printable shape memory polymer, with controlled melting and transition temperature, composed of methacrylated polycaprolactone monomers and N-Vinylcaprolactam reactive diluent. Tuning the ratio between the monomers and the diluents resulted in changes in melting and transition temperatures by 20, and 6 {\textdegree}C, respectively. The effect of the diluent addition on the shape memory behavior and mechanical properties was studied, showing above 85\% recovery ratio, and above 90\% fixity, when the concentration of the diluent was up to 40 wt \%. Finally, we demonstrated multi-material printing of a 3D structure that can be activated locally, at two different temperatures, by two different stimuli; direct heating and light irradiation. The remote light activation was enabled by utilizing a coating of Carbon Nano Tubes (CNTs) as an absorbing material, onto sections of the printed objects.}, keywords = {3d printing, 4D printing, actuators, Carbon nano tubes, Finite element analysis, Multi-material printing, shape memory polymers, soft robotics}, author = {Keneth, Ela Sachyani and Lieberman, Rama and Rednor, Matthew and Scalet, Giulia and Auricchio, Ferdinando and Magdassi, Shlomo} } @article {Pankan2020-eb, title = {A multi-walled carbon nanotubes coated 3D printed anode developed for Biophotovotaic applications}, journal = {Journal of Electroanalytical Chemistry}, volume = {872}, year = {2020}, month = {sep}, pages = {114397}, publisher = {Elsevier B.V.}, abstract = {We report a method for the design and fabrication of 3D printed bioanodes for Biophotovotaic (BPV) applications. Electrodes were fabricated in 5 different thicknesses, from 0.2 mm to 1.0 mm with a 0.2 mm increment and the electrodes were coated with multi-wall carbon nanotubes (MWCNTs). Electrochemical characterisation of these electrodes was performed and the performance tested alongside a bare carbon paper electrode in a bespoke designed membrane electrode assembly (MEA)-type BPV device. All of the MWCNTs-coated 3D printed electrodes outperformed the bare carbon paper electrode. The best performing one (1.0 mm) showed a 40 times increment in power density and a 20 times reduction of the internal resistance. The successful development of the 3D printed bioanode can be used as a standardised platform for the comparison of similar materials. The development of the electrodes and MEA-type BPV device will serve as the initial step towards the development of a monolithic 3D printed BPV platform.}, author = {Pankan, Aazraa O and Yunus, Kamran and Sachyani, Ela and Elouarzaki, Kamal and Magdassi, Shlomo and Zeng, Minyu and Fisher, Adrian C} } @article {Halevi2020-fl, title = {Nuclear wastewater decontamination by 3D-Printed hierarchical zeolite monoliths}, journal = {RSC Advances}, volume = {10}, number = {10}, year = {2020}, month = {feb}, pages = {5766{\textendash}5776}, publisher = {Royal Society of Chemistry}, abstract = {The selective removal of radioactive cationic species, specifically 137Cs+ and 90Sr2+, from contaminated water is critical for nuclear waste remediation processes and environmental cleanup after accidents, such as the Fukushima Daiichi Nuclear Power Plant disaster in 2011. Nanoporous silicates, such as zeolites, are most commonly used for this process but in addition to acting as selective ion exchange media must also be deployable in a correct physical form for flow columns. Herein, Digital Light Processing (DLP) three-dimensional (3D) printing was utilized to form monoliths from zeolite ion exchange powders that are known to be good for nuclear wastewater treatment. The monoliths comprise 3D porous structures that will selectively remove radionuclides in an engineered form that can be tailored to various sizes and shapes as required for any column system and can even be made with fine-grained powders unsuitable for normal gravity flow column use. 3D-printed monoliths of zeolites chabazite and 4A were made, characterized, and evaluated for their ion exchange capacities for cesium and strontium under static conditions. The 3D-printed monoliths with 50 wt\% zeolite loadings exhibit Cs and Sr uptake with an equivalent ion-capacity as their pristine powders. These monoliths retain their porosity, shape and mechanical integrity in aqueous media, providing a great potential for use to not only remove radionuclides from nuclear wastewater, but more widely in other aqueous separation-based applications and processes.}, author = {Halevi, Oded and Chen, Tzu Yu and Lee, Pooi See and Magdassi, Shlomo and Hriljac, Joseph A} } @article {Sousa2020-rt, title = {Over 6\% Efficient Cu(In,Ga)Se2Solar Cell Screen-Printed from Oxides on Fluorine-Doped Tin Oxide}, journal = {ACS Applied Energy Materials}, volume = {3}, number = {4}, year = {2020}, month = {mar}, pages = {3120{\textendash}3126}, publisher = {American Chemical Society}, abstract = {A new approach to fabricate copper, indium, gallium diselenide (CIGSe) solar cells on conductive fluorine-doped tin oxide (FTO) reached an efficiency of over 6\% for a champion photovoltaic device. Commercial oxide nanoparticles are formulated into high-quality screen-printable ink based on ethyl cellulose solution in terpineol. The high homogeneity and good adhesion properties of the oxide ink play an important role in obtaining dense and highly crystalline photoabsorber layers. This finding reveals that solution-based screen-printing from readily available oxide precursors provides an interesting cost-effective alternative to current vacuum- and energy-demanding processes of the CIGSe solar cell fabrication.}, keywords = {CIGSe, ink formulation, microstructure, oxide nanoparticles, photovoltaics, screen-printing}, author = {Sousa, Viviana and Gon{\c c}alves, Bruna F and Rosen, Yitzchak S and Virtuoso, Jos{\'e} and Anacleto, Pedro and Cerqueira, M F{\'a}tima and Modin, Evgeny and Alpuim, Pedro and Lebedev, Oleg I and Magdassi, Shlomo and Sadewasser, Sascha and Kolen{\textquoteright}Ko, Yury V} } @article {Garcia-Bilbao2020-do, title = {Preparation, characterization, and biological evaluation of retinyl palmitate and Dead Sea water loaded nanoemulsions toward topical treatment of skin diseases}, journal = {Journal of Bioactive and Compatible Polymers}, volume = {35}, number = {1}, year = {2020}, month = {jan}, pages = {24{\textendash}38}, publisher = {SAGE Publications Ltd}, abstract = {Millions of people suffer from different types of skin diseases worldwide. In the last decade, the development of nanocarriers has been the focus of the pharmaceutical and cosmetic industries to enhance the performance of their products, and to meet consumers{\textquoteright} demands. Several delivery systems have been developed to improve the efficiency and minimize possible side effects. In this study, retinyl palmitate and Dead Sea water loaded nanoemulsions were developed as carriers to treat skin conditions such as photoaging, psoriasis, or atopic dermatitis. Toxicity profiles were carried out by means of viability, cell membrane asymmetry study, evaluation of oxidative stress induction (reactive oxygen species), and inflammation via cytokines production with a human keratinocyte cell line (HaCaT) and a mouse embryo fibroblasts cell line (BALB/3T3). Results showed that loaded nanoemulsions were found to be non-cytotoxic under the conditions of the study. Furthermore, no oxidative stress induction was observed. Likewise, an efficacy test of these loaded nanoemulsions was also tested on human skin organ cultures, before and after ultraviolet B light treatment. Viability and caspase-3 production assessment, in response to the exposure of skin explants to the loaded nanoemulsions, indicated non-toxic effects on human skin in culture, both with and without ultraviolet B irradiation. Further the ability of loaded nanoemulsions to protect the skin against ultraviolet B damage was assessed on skin explants reducing significantly the apoptotic activation after ultraviolet B irradiation. Our promising results indicate that the developed loaded nanoemulsions may represent a topical drug delivery system to be used as an alternative treatment for recurrent skin diseases.}, keywords = {Dead Sea water, human skin explants, nanoemulsion, Retynil palmitate, Topical, ultraviolet irradiation}, author = {Garcia-Bilbao, Amaia and G{\'o}mez-Fern{\'a}ndez, Paloma and Larush, Liraz and Soroka, Yoram and Suarez-Merino, Blanca and Fru{\v s}i{\'c}-Zlotkin, Marina and Magdassi, Shlomo and Go{\~n}i-de-Cerio, Felipe} } @article {Halevi2020-we, title = {Synthesis through 3D printing: Formation of 3D coordination polymers}, journal = {RSC Advances}, volume = {10}, number = {25}, year = {2020}, month = {apr}, pages = {14812{\textendash}14817}, publisher = {Royal Society of Chemistry}, abstract = {Coordination polymers (CPs) and coordination network solids such as metal-organic frameworks (MOFs) have gained increasing interest during recent years due to their unique properties and potential applications. Preparing 3D printed structures using CP would provide many advantages towards utilization in fields such as catalysis and sensing. So far, functional 3D structures were printed mostly by dispersing pre-synthesized particles of CPs and MOFs within a polymerizable carrier. This resulted in a CP active material dispersed within a 3D polymeric object, which may obstruct or impede the intrinsic properties of the CP. Here, we present a new concept for obtaining 3D free-standing objects solely composed of CP material, starting from coordination metal complexes as the monomeric building blocks, and utilizing the 3D printer itself as a tool to in situ synthesize a coordination polymer during printing, and to shape it into a 3D object, simultaneously. To demonstrate this, a 3D-shaped nickel tetra-acrylamide monomeric complex composed solely of the CP without a binder was successfully prepared using our direct print-and-form approach. We expect that this work will open new directions and unlimited potential in additive manufacturing and utilization of CPs.}, author = {Halevi, Oded and Chen, Jingwei and Thangavel, Gurunathan and Morris, Samuel Alexander and Ben Uliel, Tal and Tischler, Yaakov Raphael and Lee, Pooi See and Magdassi, Shlomo} } @article {Tibi2020-tq, title = {Three-Layered Design of Electrothermal Actuators for Minimal Voltage Operation}, journal = {Soft Robotics}, volume = {7}, number = {5}, year = {2020}, month = {mar}, pages = {649{\textendash}662}, publisher = {Mary Ann Liebert Inc}, abstract = {By designing an actuator composed of thin layers with different coefficients of thermal expansion (CTE) together with an electrically conductive layer, the CTE mismatch can be utilized to produce soft electrothermal actuators (ETAs). These actuators have been typically implemented using only two layers, commonly relying on Timoshenko{\textquoteright}s analytic model that correlates the temperature to the actuator{\textquoteright}s curvature. In this study, we extend the analytic model to include the thermoelectric relation present in ETAs, that is, the conductive layer{\textquoteright}s properties with respect to the operation temperature. By applying the thermoelectric relation, a minimal voltage optimization can be applied to the analytic model. Using dimensionless analysis, we optimize the ETAs performance for both bi- A nd tri-layer ETAs with and without the thermal modeling. The bi-layer optimization not only predicts the maximal value for the bi-layer performance but also provides the optimal thickness of each layer for any couple of materials. We validate the tri-layer analytic model experimentally by measuring the curvature for different third layer thicknesses. Finally, we optimize the tri-layer design based on the analytic model, which can achieve an improvement in curvature per voltage of >3000\% over the optimal bi-layer ETA.}, keywords = {electrothermal actuators, minimal voltage actuation, soft actuators, thermal expansion actuation}, author = {Tibi, Gal and Sachyani Keneth, Ela and Layani, Michael and Magdassi, Shlomo and Degani, Amir} } @article {3161420, title = {3D Printing of a Thermo- and Solvatochromic Composite Material Based on a Cu(II)-Thymine Coordination Polymer with Moisture Sensing Capabilities}, journal = {Adv. Funct. Mater.Advanced Functional Materials}, volume = {29}, year = {2019}, note = {CAplus AN 2019:320730 (Journal)}, month = {2019}, pages = {n/a}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {This work presents the fabrication of 3D-printed composite objects based on copper(II) 1D coordination polymer (CP1) decorated with thymine along its chains with potential utility as an environmental humidity sensor and as a water sensor in organic solvents. This new composite object has a remarkable sensitivity, ranging from 0.3\% to 4\% of water in organic solvents. The sensing capacity is related to the structural transformation due to the loss of water mols. that CP1 undergoes with temperature or by solvent mols.' competition, which induces significant change in color simultaneously. The CP1 and 3D printed materials are stable in air over 1 yr and also at biol. pHs (5-7), therefore suggesting potential applications as robust colorimetric sensors. These results open the door to generate a family of new 3D printed materials based on the integration of multifunctional coordination polymers with organic polymers.}, keywords = {three dimensional printing composite copper thymine polymer moisture sensing}, isbn = {1616-301X}, author = {Maldonado, Noelia and Vegas, Veronica G. and Halevi, Oded and Martinez, Jose Ignacio and Lee, Pooi See and Magdassi, Shlomo and Wharmby, Michael T. and Platero-Prats, Ana E. and Moreno, Consuelo and Zamora, Felix and Amo-Ochoa, Pilar} } @article {Kam2019-yf, title = {Additive Manufacturing of 3D Structures Composed of Wood Materials}, journal = {Advanced Materials Technologies}, volume = {4}, number = {9}, year = {2019}, publisher = {Wiley-Blackwell}, abstract = {3D objects composed of 100\% wood components are 3D printed utilizing wood flour microparticles dispersed in a matrix composed of cellulose nanocrystals and xyloglucan. In the printed object, a wood waste product is {\textquoteleft}{\textquoteleft}glued{\textquoteright}{\textquoteright} with extracted wood products, to be a substitute for pristine wood. 3D printing is used to maximize conversion of low value materials into final products that exhibit visual, textural, and physical properties of natural timber. Several 3D printing technologies are applied to achieve a wide range of densities, mechanical properties, colors, and morphologies as well as high thermal insulation. Furthermore, the 3D printing process enables predesigning of fiber layout in the printed wood, which enables control of shrinkage orientation.}, keywords = {3d printing, Nanocellulose, natural materials, sustainable, Wood}, author = {Kam, Doron and Layani, Michael and BarkaiMinerbi, Sheer and Orbaum, Donna and Abrahami BenHarush, Shir and Shoseyov, Oded and Magdassi, Shlomo} } @article {Nguyen2019-mr, title = {Additive-Free Electrophoretic Deposition of Graphene Quantum Dots Thin Films}, journal = {Chemistry - A European Journal}, volume = {25}, number = {72}, year = {2019}, month = {sep}, pages = {16573{\textendash}16581}, abstract = {The electrophoretic deposition (EPD) of graphene-based materials on transparent substrates is highly potential for many applications. Several factors can determine the yield of the EPD process, such as applied voltage, deposition time and particularly the presence of dispersion additives (stabilisers) in the suspension solution. This study presents an additive-free EPD of graphene quantum dot (GQD) thin films on an indium tin oxide (ITO) glass substrate and studies the deposition mechanism with the variation of the applied voltage (10{\textendash}50 V) and deposition time (5{\textendash}25 min). It is found that due to the small size ($\approx$3.9 nm) and high content of deprotonated carboxylic groups, the GQDs form a stable dispersion (zeta-potential of about -35 mV) without using additives. The GQD thin films can be deposited onto ITO with optimal surface morphology at 30 V in 5 min (surface roughness of approximately (3.1$\pm$1.3) nm). In addition, as-fabricated GQD thin films also possess some interesting physico-optical properties, such as a double-peak photoluminescence at about λ=417 and 439 nm, with approximately 98 \% visible transmittance. This low-cost and eco-friendly GQD thin film is a promising material for various applications, for example, transparent conductors, supercapacitors and heat conductive films in smart windows.}, keywords = {electrophoretic deposition, graphene, Quantum Dots, thin films, visible transparency}, author = {Nguyen, Tam D and Geuli, Ori and Yeo, Loo Pin and Magdassi, Shlomo and Mandler, Daniel and Tok, Alfred Iing Yoong} } @article {3161416, title = {A clear solution: semiconductor nanocrystals as photoinitiators in solvent free polymerization}, journal = {NanoscaleNanoscale}, volume = {11}, year = {2019}, note = {CAplus AN 2019:1033795 (Journal)}, month = {2019}, pages = {11209 - 11216}, publisher = {Royal Society of Chemistry}, abstract = {Semiconductor nanocrystals have been shown to have unique advantages over traditional organic photoinitiators for polymerization in solution However, efficient photoinitiation with such nanoparticles in solvent-free and additive-free formulations so far has not been achieved. Herein, the ability to use semiconductor nanocrystals for efficient bulk polymerization as sole initiators is reported, operating under modern UV-blue-LED light sources found in 3D printers and other photocuring applications. Hybrid semiconductor-metal nanorods exhibit superior photoinitiation capability to their pristine semiconductor counterparts, attributed to the enhanced charge separation and oxygen consumption in such systems. Moreover, photoinitiation by semiconductor nanocrystals overcoated by inorganic ligands is reported, thus increasing the scope of possible applications and shedding light on the photoinitiation mechanism; in light of the results, two possible pathways are discussed - ligand-mediated and cation-coordinated oxidation A demonstration of the unique attributes of the quantum photoinitiators is reported in their use for high-resolution two-photon printing of optically fluorescing microstructures, demonstrating a multi-functionality capability. The bulk polymerization demonstrated here can be advantageous over solvent based methods as it alleviates the need of post-polymerization drying and reduces waste and exposure to toxic solvents, as well as broadens the possible use of quantum photoinitiators for industrial and research uses.}, isbn = {2040-3372}, author = {Verbitsky, Lior and Waiskopf, Nir and Magdassi, Shlomo and Banin, Uri} } @article {3161424, title = {A clear solution: semiconductor nanocrystals as photoinitiators in solvent free polymerization.}, journal = {NanoscaleNanoscale}, volume = {11}, year = {2019}, note = {MEDLINE PMID: 31157812 (Journal; Article)}, month = {2019}, pages = {11209 - 11216}, abstract = {Semiconductor nanocrystals have been shown to have unique advantages over traditional organic photoinitiators for polymerization in solution. However, efficient photoinitiation with such nanoparticles in solvent-free and additive-free formulations so far has not been achieved. Herein, the ability to use semiconductor nanocrystals for efficient bulk polymerization as sole initiators is reported, operating under modern UV-blue-LED light sources found in 3D printers and other photocuring applications. Hybrid semiconductor-metal nanorods exhibit superior photoinitiation capability to their pristine semiconductor counterparts, attributed to the enhanced charge separation and oxygen consumption in such systems. Moreover, photoinitiation by semiconductor nanocrystals overcoated by inorganic ligands is reported, thus increasing the scope of possible applications and shedding light on the photoinitiation mechanism; in light of the results, two possible pathways are discussed - ligand-mediated and cation-coordinated oxidation. A demonstration of the unique attributes of the quantum photoinitiators is reported in their use for high-resolution two-photon printing of optically fluorescing microstructures, demonstrating a multi-functionality capability. The bulk polymerization demonstrated here can be advantageous over solvent based methods as it alleviates the need of post-polymerization drying and reduces waste and exposure to toxic solvents, as well as broadens the possible use of quantum photoinitiators for industrial and research uses.}, author = {Verbitsky, Lior and Waiskopf, Nir and Magdassi, Shlomo and Banin, Uri} } @article {3161422, title = {Conductive nanomaterials for 2D and 3D printed flexible electronics}, journal = {Chem. Soc. Rev.Chemical Society Reviews}, volume = {48}, year = {2019}, note = {CAplus AN 2018:2568734 (Journal)}, month = {2019}, pages = {1712 - 1740}, publisher = {Royal Society of Chemistry}, abstract = {This review describes recent developments in the field of conductive nanomaterials and their application in 2D and 3D printed flexible electronics, with particular emphasis on inks based on metal nanoparticles and nanowires, carbon nanotubes, and graphene sheets. We present the basic properties of these nanomaterials, their stabilization in dispersions, formulation of conductive inks and formation of conductive patterns on flexible substrates (polymers, paper, textile) by using various printing technologies and post-printing processes. Applications of conductive nanomaterials for fabrication of various 2D and 3D electronic devices are also briefly discussed.}, isbn = {0306-0012}, author = {Kamyshny, Alexander and Magdassi, Shlomo} } @article {3161426, title = {Conductive nanomaterials for 2D and 3D printed flexible electronics.}, journal = {Chem Soc RevChemical Society reviews}, volume = {48}, year = {2019}, note = {MEDLINE PMID: 30569917 (Journal; Article; Review)}, month = {2019}, pages = {1712 - 1740}, abstract = {This review describes recent developments in the field of conductive nanomaterials and their application in 2D and 3D printed flexible electronics, with particular emphasis on inks based on metal nanoparticles and nanowires, carbon nanotubes, and graphene sheets. We present the basic properties of these nanomaterials, their stabilization in dispersions, formulation of conductive inks and formation of conductive patterns on flexible substrates (polymers, paper, textile) by using various printing technologies and post-printing processes. Applications of conductive nanomaterials for fabrication of various 2D and 3D electronic devices are also briefly discussed.}, author = {Kamyshny, Alexander and Magdassi, Shlomo} } @article {3161425, title = {Differential Homeostasis of Sessile and Pendant Epithelium Reconstituted in a 3D-Printed "GeminiChip".}, journal = {Adv MaterAdvanced materials (Deerfield Beach, Fla.)}, year = {2019}, note = {MEDLINE PMID: 31081206 (Journal; Article)}, month = {2019}, pages = {e1900514}, abstract = {Local mechanical cues can affect crucial fate decisions of living cells. Transepithelial stress has been discussed in the context of epithelial monolayers, but the lack of appropriate experimental systems leads current studies to approximate it simply as an in-plane stress. To evaluate possible contribution of force vectors acting in other directions, double epithelium in a 3D-printed "GeminiChip" containing a sessile and a pendant channel is reconstituted. Intriguingly, the sessile epithelia is prone to apoptotic cell extrusion upon crowding, whereas the pendant counterpart favors live cell delamination. Transcriptome analyses show upregulation of RhoA, BMP2, and hypoxia-signaling genes in the pendant epithelium, consistent with the onset of an epithelial-mesenchymal transition program. HepG2 microtumor spheroids also display differential spreading patterns in the sessile and pendant configuration. Using this multilayered GeminiChip, these results uncover a progressive yet critical role of perpendicular force vectors in collective cell behaviors and point at fundamental importance of these forces in the biology of cancer.}, keywords = {3d printing, epithelial homeostasis, mechanobiology, Organ-on-a-chip, tumor spheroids}, author = {Cai, Pingqiang and Li, Zhuyun and Keneth, Ela Sachyani and Wang, Luying and Wan, Changjin and Jiang, Ying and Hu, Benhui and Wu, Yun-Long and Wang, Shutao and Lim, Chwee Teck and Makeyev, Eugene V and Magdassi, Shlomo and Chen, Xiaodong} } @article {Kam2019-hq, title = {Direct cryo writing of aerogels via 3d printing of aligned cellulose nanocrystals inspired by the plant cell wall}, journal = {Colloids and Interfaces}, volume = {3}, number = {2}, year = {2019}, month = {apr}, pages = {46}, publisher = {MDPI AG}, abstract = {Aerogel objects inspired by plant cell wall components and structures were fabricated using extrusion-based 3D printing at cryogenic temperatures. The printing process combines 3D printing with the alignment of rod-shaped nanoparticles through the freeze-casting of aqueous inks. We have named this method direct cryo writing (DCW) as it encompasses in a single processing step traditional directional freeze casting and the spatial fidelity of 3D printing. DCW is demonstrated with inks that are composed of an aqueous mixture of cellulose nanocrystals (CNCs) and xyloglucan (XG), which are the major building blocks of plant cell walls. Rapid fixation of the inks is achieved through tailored rheological properties and controlled directional freezing. Morphological evaluation revealed the role of ice crystal growth in the alignment of CNCs and XG. The structure of the aerogels changed from organized and tubular to disordered and flakey pores with an increase in XG content. The internal structure of the printed objects mimics the structure of various wood species and can therefore be used to create wood-like structures via additive manufacturing technologies using only renewable wood-based materials.}, keywords = {3d printing, Aerogels, Biomimetics, Ice templating, Nanocellulose}, author = {Kam, Doron and Chasnitsky, Michael and Nowogrodski, Chen and Braslavsky, Ido and Abitbol, Tiffany and Magdassi, Shlomo and Shoseyov, Oded} } @article {Sazan2019-ij, title = {Directed assembly of nanoparticles into continuous microstructures by standing surface acoustic waves}, journal = {Journal of Colloid and Interface Science}, volume = {536}, year = {2019}, pages = {701{\textendash}709}, publisher = {Elsevier B.V.}, abstract = {Directed-assembly by standing surface acoustic waves (SSAWs) only requires an acoustic contrast between particles and their surrounding medium. It is therefore highly attractive as this requirement is fulfilled by almost all dispersed systems. Previous studies utilizing SSAWs demonstrated mainly reversible microstructure arrangements from nanoparticles. The surface chemistry of colloids dramatically influences their tendency to aggregate and sinter; therefore, it should be possible to form permanent microstructures with intimate contact between nanoparticles by controlling this property. Dispersed silver nanoparticles in a microfluidic channel were exposed to SSAWs and reversibly accumulated at the pressure nodes. We show that addition of chloride ions that remove the polyacrylic capping of the nanoparticles trigger their sintering and the formation of stable conducting silver microstructures. Moreover, if the destabilizing ions are added prior to nanoparticle assembly while continuously streaming the dispersion through the acoustic aperture, the induced aggregation leads to formation of significantly thinner microstructures, which are (for the first time) unlimited in length by the acoustic apparatus. This new approach overcomes the discrepancy between the need for organic dispersants to prevent unwanted aggregation in the dispersion, and the end product{\textquoteright}s requirement for intimate contact between the colloidal particles.}, keywords = {5.3.19, Acoustic manipulation, Conductive microstructures, Directed assembly, Micro patterning, Nanoparticle sintering, new, Stabilized nanoparticles}, author = {Sazan, Haim and Piperno, Silvia and Layani, Michael and Magdassi, Shlomo and Shpaisman, Hagay} } @article {3161421, title = {Efficient Near Infrared Modulation with High Visible Transparency Using SnO2-WO3 Nanostructure for Advanced Smart Windows}, journal = {Adv. Opt. Mater.Advanced Optical Materials}, volume = {7}, year = {2019}, note = {CAplus AN 2019:196367 (Journal)}, month = {2019}, pages = {n/a}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {Renewable energy technol. and effective energy management are the most crucial factors to consider in the progress toward worldwide energy sustainability. Smart window technol. has a huge potential in energy management as it assists in reducing energy consumption of indoor lighting and air-conditioning in buildings. Electrochromic (EC) materials, which can elec. modulate the transmittance of solar radiation, are one of the most studied smart window materials. In this work, highly transparent SnO2 inverse opal (IO) is used as the framework to electrochem. deposit amorphous WO3 layer to fabricate hybrid SnO2-WO3 core-shell IO structure. The hybrid structure is capable of effective near IR (NIR) modulation while maintaining high visible light transparency in the colored and bleached states. By varying the initial diameter of the polystyrene (PS) opal template and the WO3 electrodeposition time, optimal results can be obtained with the smallest PS diameter of 392 nm and 180 s WO3 electrodeposition. In its colored state, the 392-SnO2-WO3-180 core-shell IO structure shows ≈70\% visible light transparency, 62\% NIR blockage at 1200 nm, and ≈15\% drop in NIR blocking stability after 300 cycles. The SnO2-WO3 core-shell IO structure in this study is a promising EC material for advanced smart window technol.}, keywords = {tin tungsten oxide near IR modulation}, isbn = {2195-1071}, author = {Nguyen, Tam Duy and Yeo, Loo Pin and Kei, Tan Chiew and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred Iing Yoong} } @article {3161417, title = {Electrochemical detection of superoxide anions in HeLa cells by using two enzyme-free sensors prepared from ZIF-8-derived carbon nanomaterials}, journal = {Microchim. ActaMicrochimica Acta}, volume = {186}, year = {2019}, note = {CAplus AN 2019:1017574 (Journal)}, month = {2019}, pages = {1 - 8}, publisher = {Springer-Verlag GmbH}, abstract = {Two kinds of carbon-based nanozymes were constructed from the same precursor of zeolitic imidazolate framework-8 (ZIF-8) for O2{\textbullet}- determination Hollow carbon cubic nanomaterial (labeled as HCC) was obtained by chem. etching ZIF-8 with tannic acid and a subsequent calcination. A porous carbon cubic nanomaterial (labeled as PCC) was prepared by directly pyrolysis. Then HCC and PCC were immobilized on the surface of screen printed carbon electrodes (SPCE), fabricating HCC and PCC modified electrodes (denoted as HCC/SPCE and PCC/SPCE). HCC/SPCE, best operated at -0.5 V (vs. Ag/AgCl), has a sensitivity of 6.55 {\texttimes} 102 nA μM-1 cm-2 with a detection limit of 207 nM (at S/N = 3) for O2{\textbullet}- sensing. And PCC/SPCE, best operated at -0.4 V (vs. Ag/AgCl), exhibited a superior performance for O2{\textbullet}- detection with a sensitivity of 1.14 {\texttimes} 103 nA μM-1 cm-2 and a low detection limit of 140 nM (at S/N = 3). The two sensors possess excellent reproducibility and stability. They were used to sense O2{\textbullet}- released from HeLa cells. [Figure not available: see fulltext.]}, isbn = {0026-3672}, author = {Li, Yufei and Zhang, Huanhuan and Cai, Xuan and Zhao, Hongli and Magdassi, Shlomo and Lan, Minbo} } @article {3161419, title = {Electrochromic Materials: Efficient Near Infrared Modulation with High Visible Transparency Using SnO2-WO3 Nanostructure for Advanced Smart Windows (Advanced Optical Materials 8/2019)}, journal = {Adv. Opt. Mater.Advanced Optical Materials}, volume = {7}, year = {2019}, note = {CAplus AN 2019:774230 (Journal)}, month = {2019}, pages = {n/a}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, isbn = {2195-1071}, author = {Nguyen, Tam Duy and Yeo, Loo Pin and Kei, Tan Chiew and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred Iing Yoong} } @article {3161415, title = {Electrodeposition of amorphous WO3 on SnO2-TiO2 inverse opal nano-framework for highly transparent, effective and stable electrochromic smart window}, journal = {RSC Adv.RSC Advances}, volume = {9}, year = {2019}, note = {CAplus AN 2019:1048462 (Journal)}, month = {2019}, pages = {16730 - 16737}, publisher = {Royal Society of Chemistry}, abstract = {In recent years, there has been significant advancement in smart window technologies due to their effectiveness in reducing energy consumption of indoor lighting and air-conditioning in buildings. Electrochromic (EC) materials, in particular, have been widely studied as they provide a simple method for tuning or modulating visible light and IR (IR) transmittance. In this work, a novel hybrid, multi-layered SnO2-TiO2-WO3 inverse opal (IO) nanostructure has been fabricated via dip-coating and electrodeposition process. This hybrid nanostructure allows an electrochromic smart window for effective near IR (NIR) modulation, with high visible transparency and durable EC cycling stability. The visible transparency of as-fabricated hybrid multi-layered SnO2-TiO2-WO3 IO was measured to be in the range of 67.2-88.0\% in the bleached state and 67.0-74.4\% in the colored state, resp. Furthermore, the hybrid nanostructure is also able to modulate up to 63.6\% NIR radiation at the wavelength of 1200 nm and maintain approx. 82.6\% of its NIR blockage capability after 750 reversible cycles. The hybrid multi-layered SnO2-TiO2-WO3 IO nanostructure in this study can potentially be an effective and stable EC material for advanced smart window technol.}, isbn = {2046-2069}, author = {Nguyen, Tam Duy and Yeo, Loo Pin and Mandler, Daniel and Magdassi, Shlomo and Yoong Tok, Alfred Iing} } @article {Yeo2019-nb, title = {Electrophoretic deposition of reduced graphene oxide thin films for reduction of cross-sectional heat diffusion in glass windows}, journal = {Journal of Science: Advanced Materials and Devices}, volume = {4}, number = {2}, year = {2019}, month = {jun}, pages = {252{\textendash}259}, publisher = {Elsevier B.V.}, abstract = {Effective management of heat transfer, such as conduction and radiation, through glass windows is one of the most challenging issues in smart window technology. In this work, reduced Graphene Oxide (rGO) thin films of varying thicknesses are fabricated onto Fluorine-doped Tin Oxide (FTO) glass via electrophoretic deposition technique. The sample thicknesses increase with increasing number of deposition cycles (5, 10, 20 cycles). It is hypothesized that such rGO thin films, which are well-known for their high thermal conductivities, can conduct heat away laterally towards heat sinks and reduce near-infrared (NIR) transmittance through them, thus effectively slowing down the temperature increment indoors. The performance of rGO/FTO in reducing indoor temperatures is investigated with a solar simulator and a UV-Vis-NIR spectrophotometer. The 20-cycles rGO thin films showed 30\% more NIR blocked at 1000 nm as compared to clean FTO, as well as the least temperature increment of 0.57 {\textdegree}C following 30 min of solar irradiation. Furthermore, the visible transmittance of the as-fabricated rGO films remain on par with commercial solar films, enabling up to 60\% of visible light transmittance for optimal balance of transparency and heat reduction. These results suggest that the rGO thin films have great potential in blocking heat transfer and are highly recommended for smart window applications.}, keywords = {electrophoretic deposition, Heat conduction, Reduced graphene oxide, smart windows, thin films}, author = {Yeo, Loo Pin and Nguyen, Tam Duy and Ling, Han and Lee, Ying and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred Iing Yoong} } @article {Rosental2019-kt, title = {A New Approach to 3D Printing Dense Ceramics by Ceramic Precursor Binders}, journal = {Advanced Engineering Materials}, volume = {21}, number = {10}, year = {2019}, month = {aug}, pages = {1900604}, publisher = {Wiley}, abstract = {Fabrication of dense ceramic objects by 3D printing processes is important in achieving improved functions in many applications, such as mechanical, optical, and electrical devices. It is a challenging process, mainly due to the high content of organic binders within the printed object. Upon heating and sintering, the printed object shrinks and becomes porous due to the decomposition of the organic binder. Herein, a new approach is presented based on the utilization of an inorganic binder that is a sol{\textendash}gel precursor for the same material composing the dispersed ceramic particles. The approach is demonstrated in printing objects composed of barium titanate (BTO), which is an important dielectric and piezoelectric material. This binder also enables us to achieve dispersions with high solid load that exhibits a shear-thinning rheological behavior, which is essential for direct ink writing (DIW) printing technology. The as-printed parts contain only 1 wt\% organic materials, having 97.8\% of the theoretical density, whereas the BTO binder crystalizes upon heating, without forming undesired secondary phases.}, keywords = {3d printing, additive manufacturing, ceramics, direct ink writing, Sol-Gel}, author = {Rosental, Tamar and Magdassi, Shlomo} } @article {Raz2019-uq, title = {Simple fabrication of SWIR detectors based on wet deposition of carbon nanotubes and quantum dots}, journal = {Sensors and Actuators, A: Physical}, volume = {295}, year = {2019}, month = {aug}, pages = {469{\textendash}473}, publisher = {Elsevier B.V.}, abstract = {Over the last two decades, carbon based materials and especially carbon nanotubes (CNTs), were the subject of many studies, mainly due to their unique electrical, optical and mechanical properties (Ouyang et al., 2002; Dresselhaus et al., 2003; Dresselhaus et al., 1995). CNTs can combine electrical conductivity with wide absorption spectra, and can be produced in large scale (Danafar et al., 2009) [4]. These properties enable to realize CNTs in simple, low-cost detector. Here we present a proof-of-concept for such a detector operating at the short-wave infrared (SWIR) regime. We use a simple spray technique, which allows creating a large matrix of CNT bundles. Semiconducting quantum dots (QDs) were adsorbed on top of the CNTs, enhancing the sensitivity to the infrared regime. This regime is important for numerous applications in the civil, medical, defense and security fields. Controlled coupling between the QDs and the CNT matrix generates gate-like electro-optical response when light is absorbed. This proof-of-concept for a detector in the SWIR region is presented for large surfaces and substrates, while the responsivity and detectivity of the detector in a range of frequencies and wavelengths was evaluated.}, keywords = {Carbon nano tubes, Detectors, Quantum Dots, Room temperature, Spray, SWIR}, author = {Raz, Lilach Saltoun and Sachyani Keneth, Ela and Jang, Youngjin and Shapiro, Arthur and Cohen, Eyal and Yochelis, Shira and Lifshitz, Efrat and Magdassi, Shlomo and Paltiel, Yossi} } @article {3161423, title = {Size and lipid modification determine liposomal Indocyanine green performance for tumor imaging in a model of rectal cancer.}, journal = {Sci RepScientific reports}, volume = {9}, year = {2019}, note = {MEDLINE PMID: 31189986 (Journal; Article)}, month = {2019}, pages = {8566}, abstract = {Localization of rectal tumors is a challenge in minimally invasive surgery due to the lack of tactile sensation. We had developed liposomal indocyanine green (Lip-ICG) for localization of rectal tumor. In this study we evaluated the effects of liposome size and lipid PEGylation on imaging. We used an endoscopically-guided orthotopic experimental rectal cancer model in which tumor fluorescence was determined at different time points after intravenous (i.v.) administration of Lip-ICG and PEGylated liposomes (PEG-Lip-ICG). Signal intensity was measured by tumor-to-background ratio (TBR), or normalized TBR (compared to TBR of free ICG). Fluorescence microscopy of tumor tissue was performed to determine fluorescence localization within the tissue and blood vessels. Liposomes of 60 nm showed an increased TBR compared with free ICG at 12 hours after i.v. injection: normalized TBR (nTBR) = 3.11 vs. 1, respectively (p = 0.006). Larger liposomes (100 nm and 140 nm) had comparable signal to free ICG (nTBR = 0.98 {\textpm} 0.02 and 0.78 {\textpm} 0.08, respectively), even when additional time points were examined (0.5, 3 and 24 hours). PEG-Lip- ICG were more efficient than Lip-ICG (TBR = 4.2 {\textpm} 0.18 vs. 2.5 {\textpm} 0.12, p \< 0.01) presumably because of reduced uptake by the reticulo-endothelial system. ICG was found outside the capillaries in tumor margins. We conclude that size and lipid modification impact imaging intensity.}, author = {Bar-David, Shoshi and Larush, Liraz and Goder, Noam and Aizic, Asaf and Zigmond, Ehud and Varol, Chen and Klausner, Joseph and Magdassi, Shlomo and Nizri, Eran} } @article {3161414, title = {Size and lipid modification determine liposomal Indocyanine green performance for tumor imaging in a model of rectal cancer}, journal = {Sci. Rep.Scientific Reports}, volume = {9}, year = {2019}, note = {CAplus AN 2019:1160371 (Journal)}, month = {2019}, pages = {1 - 8}, publisher = {Nature Research}, abstract = {Localization of rectal tumors is a challenge in minimally invasive surgery due to the lack of tactile sensation. We had developed liposomal indocyanine green (Lip-ICG) for localization of rectal tumor. In this study we evaluated the effects of liposome size and lipid PEGylation on imaging. We used an endoscopically-guided orthotopic exptl. rectal cancer model in which tumor fluorescence was determined at different time points after i.v. (i.v.) administration of Lip-ICG and PEGylated liposomes (PEG-Lip-ICG). Signal intensity was measured by tumor-to-background ratio (TBR), or normalized TBR (compared to TBR of free ICG). Fluorescence microscopy of tumor tissue was performed to determine fluorescence localization within the tissue and blood vessels. Liposomes of 60 nm showed an increased TBR compared with free ICG at 12 h after i.v. injection: normalized TBR (nTBR) = 3.11 vs. 1, resp. (p = 0.006). Larger liposomes (100 nm and 140 nm) had comparable signal to free ICG (nTBR = 0.98 {\textpm} 0.02 and 0.78 {\textpm} 0.08, resp.), even when addnl. time points were examined (0.5, 3 and 24 h). PEG-Lip- ICG were more efficient than Lip-ICG (TBR = 4.2 {\textpm} 0.18 vs. 2.5 {\textpm} 0.12, p \< 0.01) presumably because of reduced uptake by the reticulo-endothelial system. ICG was found outside the capillaries in tumor margins. We conclude that size and lipid modification impact imaging intensity.}, isbn = {2045-2322}, author = {Bar-David, Shoshi and Larush, Liraz and Goder, Noam and Aizic, Asaf and Zigmond, Ehud and Varol, Chen and Klausner, Joseph and Magdassi, Shlomo and Nizri, Eran} } @article {3161418, title = {Thin Copper Flakes for Conductive Inks Prepared by Decomposition of Copper Formate and Ultrafine Wet Milling}, journal = {Adv. Mater. Technol. (Weinheim, Ger.)Advanced Materials Technologies (Weinheim, Germany)}, volume = {4}, year = {2019}, note = {CAplus AN 2019:868348 (Journal)}, month = {2019}, pages = {n/a}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {Fabrication of devices by printing conductive interconnections on plastic substrates is of growing interest. Currently, silver flakes are wildly used, however the high cost of silver prevents their wide use in many elec. devices. A new two-step process for synthesizing thin copper flakes, and their utilization in conductive inks, is reported. In the first step, sub-micrometer copper particles are formed by thermal decomposition and self-reduction of copper formate. These copper particles are then milled in a wet bead mill that results in their transformation into thin flakes with an average thickness of 48 nm. X-ray diffraction results indicate that the copper particles undergo plastic deformation in a mechanism similar to cold rolling. The effect of various process parameters and type of dispersing agents on the morphol. and elec. performance is studied. The ink formulations result in printed patterns with 22\% of bulk copper conductivity The optimal ink is used to print functioning near field communication antennas on polyimide film, which is found to have a high bending durability.}, isbn = {2365-709X}, author = {Rosen, Yitzchak and Marrach, Roy and Gutkin, Vitaly and Magdassi, Shlomo} } @article {Agarwala2018-yl, title = {3D Printed Bioelectronic Platform with Embedded Electronics}, journal = {MRS Advances}, volume = {3}, number = {50}, year = {2018}, pages = {2991{\textendash}3002}, publisher = {Cambridge University Press}, abstract = {Abstract Silver nanoparticle based microelectrodes embedded between layers of hydrogel material were successfully fabricated. 3D bioprinting is employed to print the entire bioelectronics platform comprising of conducting silver ink and Gelatin methacryloyl (GelMA) hydrogel. The additive manufacturing technique of bioprinting gives design freedom for the circuit, saves material and shortens the time to fabricate the bioelectronics platform. The silver platform shows excellent electrical conductivity, structural flexibility and stability in wet environment. It is tested for biocompatibility using C2C12 murine myoblasts cell line. The work demonstrates the potential of the fabricated platform for the realization of practical bioelectronic devices.}, keywords = {2018, 3d printing, 5.3.19, additive manufacturing, biomaterial, existing at 5.3.19, Flexible, nanoscale, new}, author = {Agarwala, Shweta and Lee, Jia Min and Yeong, Wai Yee and Layani, Michael and Magdassi, Shlomo} } @article {Shukrun2018-ru, title = {3D-Printed Organic{\textendash}Ceramic Complex Hybrid Structures with High Silica Content}, journal = {Advanced Science}, volume = {5}, number = {8}, year = {2018}, month = {aug}, pages = {1800061}, publisher = {Wiley-Blackwell}, abstract = {Hybrid organic{\textendash}inorganic sol gel inks that can undergo both condensation and radical polymerization are developed, enabling fabrication of complex objects by additive manufacturing technology, yielding 3D objects with superior properties. The 3D objects have very high silica content and are printed by digital light processing commercial printers. The printed lightweight objects are characterized by excellent mechanical strength compared to currently used high-performance polymers (139 MPa), very high stability at elevated temperatures (heat deflection temperature >270 {\textdegree}C), high transparency (89\%), and lack of cracks, with glossiness similar to silica glasses. The new inks fill the gap in additive manufacturing of objects composed of ceramics only and organic materials only, thus enabling harnessing the advantages of both worlds of materials.}, keywords = {2018, 3d printing, 3DP, 5.3.19, ceramics, Composite, digital light processing, DLP, existing at 5.3.19, figures, hybrid organic{\textendash}ceramic inks, new, sol gel, Sol-Gel, UV curable materials}, author = {Shukrun, Efrat and Cooperstein, Ido and Magdassi, Shlomo} } @article {Cooperstein2018-qc, title = {Additive Manufacturing of Transparent Silica Glass from Solutions}, journal = {ACS Applied Materials and Interfaces}, volume = {10}, number = {22}, year = {2018}, pages = {18879{\textendash}18885}, publisher = {American Chemical Society}, abstract = {A sol, aqueous solution-based ink is presented for fabrication of 3D transparent silica glass objects with complex geometries, by a simple 3D printing process conducted at room temperature. The ink combines a hybrid ceramic precursor that can undergo both the photopolymerization reaction and a sol-gel process, both in the solution form, without any particles. The printing is conducted by localized photopolymerization with the use of a low-cost 3D printer. Following printing, upon aging and densifying, the resulting objects convert from a gel to a xerogel and then to a fused silica. The printed objects, which are composed of fused silica, are transparent and have tunable density and refractive indices.}, keywords = {2018, 3d printing, 3DP, 5.3.19, additive manufacturing, ceramic, ceramics, existing at 5.3.19, new, silica, sinteringl, sol gel, Sol-Gel, solution, transparent glass}, author = {Cooperstein, Ido and Shukrun, Efrat and Press, Ofir and Kamyshny, Alexander and Magdassi, Shlomo} } @article {Farraj2018-lq, title = {Binuclear Copper Complex Ink as a Seed for Electroless Copper Plating Yielding >70\% Bulk Conductivity on 3D Printed Polymers}, journal = {Advanced Materials Interfaces}, volume = {5}, number = {8}, year = {2018}, pages = {1870038}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {3D printed electronics is an emerging field of high importance in both academic research and industrial manufacturing. It enables fabrication of 3D devices with embedded or conformal electronic circuits, which are relevant to a variety of applications, such as Internet of things, soft robotics, and medical devices. Patterning of electrical conductors with conductivity higher than 50\% bulk copper is challenging and usually involves electroless or electrolytic deposition processes that require the use of very costly catalyst, mainly palladium, as a seed material. Here, the use of a binuclear copper complex as a very efficient replacement for the conventional catalysts, which can be directly inkjet printed onto 3D plastic objects, is described. After printing, the copper complex is converted into pure copper upon short exposure to low-temperature plasma. By combining the binuclear complex with electroless plating, resistivity as low as 2.38 {\textmu}Ω cm, which corresponds to a 72\% conductivity of bulk copper, is obtained. The applicability of the complex ink and the process is demonstrated in the fabrication of a near-field communication antenna on a 3D printed plastic object.}, keywords = {2018, 3D printings, 5.3.19, conductive, copper complex inks, electroless plating, existing at 5.3.19, heat-sensitive substrates, new}, author = {Farraj, Yousef and Layani, Michael and Yaverboim, Avi and Magdassi, Shlomo} } @article {Stern2018-wu, title = {Conductivity Enhancement of Transparent 2D Carbon Nanotube Networks Occurs by Resistance Reduction in All Junctions}, journal = {Journal of Physical Chemistry C}, volume = {122}, number = {26}, year = {2018}, pages = {14872{\textendash}14876}, publisher = {American Chemical Society}, abstract = {Transparent conductive networks are important for flexible electronics and solar cells. Often interwire (junction) conductivity is the limiting factor for network conductivity and can be improved by various treatments. The conductivity of individual junctions in a single walled carbon nanotube network was measured by conductive atomic force microscopy before and after exposure to nitric acid. The measurements show that this exposure improves the conductivity of each one of the junctions within the network. Our results suggest that the acid improves the conductivity by p-type charge transfer doping and by surfactant degradation.}, keywords = {2018, 5.3.19, cond transparent two dimensional carbon nanotube n, existing at 5.3.19, new, resistance redn junction cond two dimensional carb}, author = {Stern, Avigail and Azoubel, Suzanna and Sachyani, Ela and Livshits, Gideon I and Rotem, Dvir and Magdassi, Shlomo and Porath, Danny} } @article {Cai2018-ep, title = {Direct inkjet-patterning of energy efficient flexible electrochromics}, journal = {Nano Energy}, volume = {49}, year = {2018}, pages = {147{\textendash}154}, publisher = {Elsevier Ltd.}, abstract = {High-quality patterns were successfully prepared by inkjet-printing WO3-PEDOT:PSS composites on different substrates including the rigid FTO glass and most importantly, on flexible PEDOT:PSS/Ag grid/PET. Excellent electrochromic performances can be achieved, including large optical modulation (85.7\% optical contrast at the wavelength of 633 nm on FTO glass substrate), fast switching speed (coloration/bleaching time of 2.4/0.8 s on the PEDOT:PSS/Ag grid/PET substrate), instantaneous coloration efficiency (68.8 cm2 C-1) and good cycling stability (up to 10,000 cycles). The effects of the applied potential window during electrochemical evaluation on the electrochromic performances were analyzed in detail. The printed electrochromics films on PEDOT:PSS/Ag grid/PET showed the best electrochemical stability, in agreement with its superior conductivity and transmittance at 633 nm of 0.6 Ω/sq and 66\%, respectively. It sustained transmittance modulation of about 75.5\% and 53.1\% of its first cycle recorded contrast at 633 nm, after being subjected to 1000 and 5000 cycles, respectively, and maintained good electrochemical stability up to 10,000 cycles. Moreover, a robust mechanical stability was also achieved by the printed films on flexible PEDOT:PSS/Ag grid/PET substrate. The film maintained a transmittance modulation of 85.8\% of its original contrast after 5000 bending cycles at a curvature radius of 1 cm. The inkjet-printed WO3 nanocomposite based flexible electrochromic displays exhibited excellent electrochromic performance, making it a promising candidate for energy efficient displays, e-books, e-cards and multifunctional electronic devices.}, keywords = {2018, 5.3.19, existing at 5.3.19, Flexible electrochromic display, Inkjet-printing, new, PEDOT:PSS, Silver grid, tungsten trioxide}, author = {Cai, Guofa and Cheng, Xing and Layani, Michael and Tan, Alvin Wei Ming and Li, Shaohui and Eh, Alice Lee Sie and Gao, Dace and Magdassi, Shlomo and Lee, Pooi See} } @article {Rosen2018-rj, title = {Effect of Carboxylic Acids on Reactive Transfer Printing of Copper Formate Ink}, journal = {MRS Advances}, volume = {3}, number = {5}, year = {2018}, pages = {261{\textendash}267}, publisher = {Cambridge University Press}, abstract = {During decomposition of copper formate, a volatile intermediate is formed, that can be utilized to fabricate conductive copper lines for electrical interconnections. By the method called Reactive Transfer Printing (RTP), a pattern of copper (II) formate was printed, and placed adjacent to a second surface; decomposition of the printed pattern led to a transfer of copper to the second substrate. It was found that the yield of the transfer process improved due to presence of several carboxylic acids which are liquid with a high boiling point. Furthermore we found that the transport of copper starts at a lower temperature than previously reported, indicating that the first decomposition step of copper formate is related to the catalytic decomposition of formic acid on a copper surface. The findings enable printing of conductive copper patterns onto the interior surface of a glass vessel.}, keywords = {2018, 5.3.19, chemical vapor deposition (CVD) (chemical reaction), Cu, existing at 5.3.19, new}, author = {Rosen, Yitzchak S and Magdassi, Shlomo} } @article {Perrin2018-bj, title = {Evaporation of Nanosuspensions on Substrates with Different Hydrophobicity}, journal = {ACS Applied Materials and Interfaces}, volume = {10}, number = {3}, year = {2018}, pages = {3082{\textendash}3093}, publisher = {American Chemical Society}, abstract = {Liquid drop evaporation on surfaces is present in many industrial and medical applications, e.g., printed electronics, spraying of pesticides, DNA mapping, etc. Despite this strong interest, a theoretical description of the dynamic of the evaporation of complex liquid mixtures and nanosuspensions is still lacking. Indeed, one of the aspects that have not been included in the current theoretical descriptions is the competition between the kinetics of evaporation and the adsorption of surfactants and/or particles at the liquid/vapor and liquid/solid interfaces. Materials formed by an electrically isolating solid on which a patterned conducting layer was formed by the deposits left after drop evaporation have been considered as very promising for building electrical circuits on flexible plastic substrates. In this work, we have done an exhaustive study of the evaporation of nanosuspensions of latex and hydrophobized silver nanoparticles on four substrates of different hydrophobicity. The advancing and receding contact angles as well as the time dependence of the volume of the droplets have been measured over a broad range of particle concentrations. Also, mixtures of silver particles and a surfactant, commonly used in industrial printing, have been examined. Furthermore, the adsorption kinetics at both the air/liquid and solid/liquid interfaces have been measured. Whereas the latex particles do not adsorb at the solid/liquid and only slightly reduce the surface tension, the silver particles strongly adsorb at both interfaces. The experimental results of the evaporation process were compared with the predictions of the theory of Semenov et al. (Evaporation of Sessile Water Droplets: Universal Behavior in the Presence of Contact Angle Hysteresis. Colloids Surf. Physicochem. Eng. Asp. 2011, 391 (1-3), 135-144) and showed surprisingly good agreement despite that the theory was developed for pure liquids. The morphology of the deposits left by the droplets after total evaporation was studied by scanning electronic microscopy, and the effects of the substrate, the particle nature, and their concentrations on these patterns are discussed.}, keywords = {2018, contact angle, evaporation, existing at 5.3.19, nanomaterial, sessile droplet, suspension}, author = {Perrin, Lionel and Pajor-{\'S}wierzy, Anna and Magdassi, Shlomo and Kamyshny, Alexander and Ortega, Francisco and Rubio, Ram{\'o}n G} } @article {Patel2018-rr, title = {Fully 2D and 3D printed anisotropic mechanoluminescent objects and their application for energy harvesting in the dark}, journal = {Materials Horizons}, volume = {5}, number = {4}, year = {2018}, pages = {708{\textendash}714}, publisher = {Royal Society of Chemistry}, abstract = {We report on new material compositions enabling fully printed mechanoluminescent 3D devices by using a one-step direct write 3D printing technology. The ink is composed of PDMS, transition metal ion-doped ZnS particles, and a platinum curing retarder that enables a long open time for the printing process. 3D printed mechanoluminescent multi-material objects with complex structures were fabricated, in which light emission results from stretching or wind blowing. The multi-material printing yielded anisotropic light emission upon compression from different directions, enabling its use as a directional strain and pressure sensor. The mechanoluminescent light emission peak was tailored to match that of a perovskite material, and therefore, enabled the direct conversion of wind power in the dark into electricity, by linking the printed device to perovskite-based solar cells.}, keywords = {2018, 5.3.19, existing at 5.3.19, new}, author = {Patel, Dinesh K and Cohen, Bat El and Etgar, Lioz and Magdassi, Shlomo} } @article {Zhou2018-bd, title = {Fully Printed Flexible Smart Hybrid Hydrogels}, journal = {Advanced Functional Materials}, volume = {28}, number = {9}, year = {2018}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {A printable hybrid hydrogel is fabricated by embedding poly(N-isopropylacrylamide) (PNIPAm) microparticles within a water-rich silica-alumina(Si/Al)-based gel matrix. The hybrid gel holds water content of up to 70 wt\%, due to its unique Si/Al matrix. The hybrid hydrogel can respond to both heat and electrical stimuli, and can be directly printed layer-by-layer using a commercial 3-dimensional printer, without requiring any curing. The hybrid ink is printed onto a transparent, flexible conductive electrode composed of silver nanoparticles and sustains bending angles of up to 180{\textdegree}, which enables patterning of various flexible devices such as smart windows and a 3D optical waveguide valve.}, keywords = {2018, 3d printing, 5.3.19, existing at 5.3.19, Hydrogels, new, PNIPAm, smart windows, Thermochromics}, author = {Zhou, Yang and Layani, Michael and Wang, Shancheng and Hu, Peng and Ke, Yujie and Magdassi, Shlomo and Long, Yi} } @article {Zhang2018-oz, title = {Highly stretchable hydrogels for UV curing based high-resolution multimaterial 3D printing}, journal = {Journal of Materials Chemistry B}, volume = {6}, number = {20}, year = {2018}, pages = {3246{\textendash}3253}, publisher = {Royal Society of Chemistry}, abstract = {We report a method to prepare highly stretchable and UV curable hydrogels for high resolution DLP based 3D printing. Hydrogel solutions were prepared by mixing self-developed high-efficiency water-soluble TPO nanoparticles as the photoinitiator with an acrylamide-PEGDA (AP) based hydrogel precursor. The TPO nanoparticles make AP hydrogels UV curable, and thus compatible with the DLP based 3D printing technology for the fabrication of complex hydrogel 3D structures with high-resolution and high-fidelity (up to 7 μm). The AP hydrogel system ensures high stretchability, and the printed hydrogel sample can be stretched by more than 1300\%, which is the most stretchable 3D printed hydrogel. The printed stretchable hydrogels show an excellent biocompatibility, which allows us to directly 3D print biostructures and tissues. The great optical clarity of the AP hydrogels offers the possibility of 3D printing contact lenses. More importantly, the AP hydrogels are capable of forming strong interfacial bonding with commercial 3D printing elastomers, which allows us to directly 3D print hydrogel-elastomer hybrid structures such as a flexible electronic board with a conductive hydrogel circuit printed on an elastomer matrix.}, keywords = {2018, 5.3.19, acrylamide PEGDA copolymer hydrogel 3D printing tr, existing at 5.3.19, new}, author = {Zhang, Biao and Li, Shiya and Hingorani, Hardik and Serjouei, Ahmad and Larush, Liraz and Pawar, Amol A and Goh, Wei Huang and Sakhaei, Amir Hosein and Hashimoto, Michinao and Kowsari, Kavin and Magdassi, Shlomo and Ge, Qi} } @article {Rai2018-vd, title = {Hot dipping post treatment for improved efficiency in micro patterned semi-transparent perovskite solar cells}, journal = {Journal of Materials Chemistry A}, volume = {6}, number = {46}, year = {2018}, pages = {23787{\textendash}23796}, publisher = {Royal Society of Chemistry}, abstract = {Perovskite solar cells have emerged as a new semi-transparent PV technology for urban infrastructures that demands an explicit trade-off between power conversion efficiency (PCE) and average visible transparency (AVT) which can be adjusted by various modifications in the absorber layer. Here, we introduce a scalable and facile {\textquoteleft}{\textquoteleft}one and a half{\textquoteright}{\textquoteright} step deposition route for mixed cation perovskites patterned in a sub-micron sized grid structure for semi-transparent solar cells. The initial perovskite phase is formed in one step using a grid pattern, while the additional step involves dipping of the pre-deposited perovskite grid in a hot solution of formamidinium iodide (FAI) in isopropanol (IPA). Detailed analysis suggests that the additional step increases pore filling, crystal quality, and grain size and lowers the content of residual PbI2 as well as reveals improved photo physical properties. An average PCE \~{}10\% with an AVT of 28\% is attained with a gold contact for the champion semi-transparent solar cell. The proposed deposition route can be generalized for all other types of perovskite based devices to yield better efficiency.}, keywords = {2018, 5.3.19, existing at 5.3.19, new}, author = {Rai, Monika and Rahmany, Stav and Lim, Swee Sien and Magdassi, Shlomo and Wong, Lydia Helena and Etgar, Lioz} } @article {Halevi2018-nw, title = {Hydrolytically Stable MOF in 3D-Printed Structures}, journal = {Advanced Sustainable Systems}, volume = {2}, number = {2}, year = {2018}, pages = {1{\textendash}5}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {Metal{\textendash}organic frameworks (MOFs) are a well-developed field of materials, having a high potential for various applications such as gas storage, water purification, and catalysis. Despite the continuous discoveries of new MOFs, so far there are only a limited number of industrial applications, partially due to their low chemical stability and limited mechanical properties, as well as difficulties in integration within functional devices, Herein, a new approach is presented toward the fabrication of MOF-based devices, utilizing direct 3D printing. By this method, 3D, flexible, and hydrolytically stable MOF-embedded polymeric structures are fabricated. It is found that the adsorption capacity of the 3D-printed MOF is retained, with significantly improved hydrolytic stability of the printed MOFs (copper benzene-1,3,5-tricarboxylate) compared to the MOF only. It is expected that applying 3D printing technologies, for the fabrication of functional MOF objects such as filters and matrices for columns and flow reactors, will open the way for utilization of this important class of materials.}, keywords = {2018, 3d printing, 5.3.19, additive manufacturing, metal{\textendash}organic framework (MOF), new, Polymers}, author = {Halevi, Oded and Tan, Joel M R and Lee, Pooi See and Magdassi, Shlomo} } @article {Liu2018-oa, title = {Index-tunable anti-reflection coatings: Maximizing solar modulation ability for vanadium dioxide-based smart thermochromic glazing}, journal = {Journal of Alloys and Compounds}, volume = {731}, year = {2018}, pages = {1197{\textendash}1207}, publisher = {Elsevier B.V.}, abstract = {Vanadium dioxide (VO2) nanoparticles with reversible semiconductor-metal phase transition holds the tremendous potential as a thermochromic material for the energy-saving smart glazing. However, the trade-off between improving the luminous transmittance (Tlum) while sacrificing the solar modulation ability (ΔTsol) hampers its bench-to-market translation. Previous studies of anti-reflection coatings (ARCs) focused primarily on increasing Tlum while neglecting ΔTsol, which is a key energy-saving determinant. The intrinsically low ΔTsol (<16\%) is due to the fact that VO2 has a higher refractive index (RI) from 500 nm to 2200 nm wavelength (λ) below its critical transition temperature (τc), which causes excessive reflection at a lower temperature. This study aims to investigate ARCs with tunable RI (1.47{\textendash}1.92 at λ = 550 nm) to improve the antireflection effect at a lower temperature, thereby maximizing ΔTsol for various VO2 nanosubstrates, e.g. continuous thin films, nanocomposites, and periodic micro-patterning films. We showed that the best performing coatings could maximize ΔTsol (from 15.7\% to 18.9\%) and increase Tlum(avg) (from 39\% to 44\%) simultaneously, which surpasses the current bench-mark specifications ever reported for ARC-coated VO2 smart glazing. In addition, the cytotoxicity analyses evidence that ARCs are feasible to improve the cyto-compatibility of VO2 nanoparticles-based nanocomposites. The presented RI-tunable ARC, which circumvents the complex materials selection and optical design, not only paves the way for practical applications of VO2-based smart windows but also has extensive applications in the field of solar cells, optical lenses, smart display, etc.}, keywords = {2018, 5.3.19, Anti-reflection, new, Optical design, refractive index, THERMOCHROMISM, Vanadium Dioxide}, author = {Liu, Chang and Wang, Shancheng and Zhou, Yang and Yang, Haibo and Lu, Qi and Mandler, Daniel and Magdassi, Shlomo and Tay, Chor Yong and Long, Yi} } @article {Shi2018-hj, title = {An inkjet printed Ag electrode fabricated on plastic substrate with a chemical sintering approach for the electrochemical sensing of hydrogen peroxide}, journal = {Sensors and Actuators, B: Chemical}, volume = {256}, year = {2018}, pages = {938{\textendash}945}, publisher = {Elsevier B.V.}, abstract = {The trend of developing electrochemical sensors toward cellular level detection put forward higher requirements of the electrodes in the detection performance. However, common disk electrodes or conventional screen printing electrodes meet up with some limitations in the electrocatalytic activity and electron transfer capability. In this work, we applied inkjet printing technology to fabricate electrodes to make some improvements. Highly conductive Ag nanoparticles based electrodes were obtained on plastic substrate by inkjet printing technology followed by a sintering process at room temperature. The resistivity of IPAgE is determined to be 64.0 $\pm$ 5.3 μΩ cm. With better conductivity and the nanoparticle-based interface, superb electrochemical response of IPAgE for H2O2 was obtained, nearly 300-fold higher than the conventional screen printed Ag electrode. Moreover, high sensitivity of 287 μA mM-1 cm-2 with a LOD of 5.0 μM was obtained under the optimized 20 printed layers. The inkjet printed Ag electrodes were also credibly applied in the detection of H2O2 release from living cells. This work demonstrates inkjet printing is a promising method for the high performance electrochemical sensors.}, keywords = {2018, 5.3.19, Ag electrode, Electrochemical sensors, existing at 5.3.19, Hydrogen Peroxide, inkjet printing, Living cells, new}, author = {Shi, Libo and Layani, Michael and Cai, Xuan and Zhao, Hongli and Magdassi, Shlomo and Lan, Minbo} } @article {Yeshua2018-va, title = {Nanochemical Printing: Micrometer to 15 nm Printing of Metallic Inks with Fountain Pen Nanolithography (Small 1/2018)}, journal = {Small}, volume = {14}, number = {1}, year = {2018}, pages = {1870001}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {The field of printed electronics is continually trying to reduce the dimensions of the elec. components. Here, a method of printing metallic lines with widths as small as 15 nm and up to a few micrometers using fountain pen nanolithog. (FPN) is shown. The FPN technique is based on a bent nanopipette with at. force feedback that acts similar to a nanopen. The geometry of the nanopen allows for rapid placement accuracy of the printing tip, on any desired location, with the highest of optical sub-micrometer resoln. Using this nanopen, investigations of various inks are undertaken together with instrumental and script-tool development that allows accurate printing of multiple layers. This has led to the printing of conductive lines using inks composed of silver nanoparticles and salt solns. of silver and copper. In addn., it is shown that the method can be applied to substrates of various materials with minimal effect on the dimension of the line. The line widths are varied by using nanopens with different orifices or by tailoring the wetting properties of the ink on the substrate. Metallic interconnections of conducting lines are reported. [on SciFinder(R)]}, keywords = {2018, 5.3.19, existing at 5.3.19, metallic ink printing fountain pen nanolithog, nanochemical printing, nanoprinting, new, printed electronics}, author = {Yeshua, Talia and Layani, Michael and Dekhter, Rimma and Huebner, Uwe and Magdassi, Shlomo and Lewis, Aaron} } @article {Agarwala2018-kn, title = {A novel 3D bioprinted flexible and biocompatible hydrogel bioelectronic platform}, journal = {Biosensors and Bioelectronics}, volume = {102}, year = {2018}, pages = {365{\textendash}371}, publisher = {Elsevier B.V.}, abstract = {Bioelectronics platforms are gaining widespread attention as they provide a template to study the interactions between biological species and electronics. Decoding the effect of the electrical signals on the cells and tissues holds the promise for treating the malignant tissue growth, regenerating organs and engineering new-age medical devices. This work is a step forward in this direction, where bio- and electronic materials co-exist on one platform without any need for post processing. We fabricate a freestanding and flexible hydrogel based platform using 3D bioprinting. The fabrication process is simple, easy and provides a flexible route to print materials with preferred shapes, size and spatial orientation. Through the design of interdigitated electrodes and heating coil, the platform can be tailored to print various circuits for different functionalities. The biocompatibility of the printed platform is tested using C2C12 murine myoblasts cell line. Furthermore, normal human dermal fibroblasts (primary cells) are also seeded on the platform to ascertain the compatibility.}, keywords = {2018, 5.3.19, Biocompatible, Bioelectronic, bioink, Bioprinting, Electrode, Flexible, Heating coil, Hydrogel, new}, author = {Agarwala, Shweta and Lee, Jia Min and Ng, Wei Long and Layani, Michael and Yeong, Wai Yee and Magdassi, Shlomo} } @article {Layani2018-eu, title = {Novel Materials for 3D Printing by Photopolymerization}, journal = {Advanced Materials}, volume = {30}, number = {41}, year = {2018}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {The field of 3D printing, also known as additive manufacturing (AM), is developing rapidly in both academic and industrial research environments. New materials and printing technologies, which enable rapid and multimaterial printing, have given rise to new applications and utilizations. However, the main bottleneck for achieving many more applications is the lack of materials with new physical properties. Here, some of the recent reports on novel materials in this field, such as ceramics, glass, shape-memory polymers, and electronics, are reviewed. Although new materials have been reported for all three main printing approaches{\textendash}-fused deposition modeling, binder jetting or laser sintering/melting, and photopolymerization-based approaches, apparently, most of the novel physicochemical properties are associated with materials printed by photopolymerization approaches. Furthermore, the high resolution that can be achieved using this type of 3D printing, together with the new properties, has resulted in new implementations such as microfluidic, biomedical devices, and soft robotics. Therefore, the focus here is on photopolymerization-based additive manufacturing including the recent development of new methods, novel monomers, and photoinitiators, which result in previously inaccessible applications such as complex ceramic structures, embedded electronics, and responsive 3D objects.}, keywords = {2018, 3d printing, 5.3.19, additive manufacturing, ceramics, existing at 5.3.19, functional printing, new, photoinitiators, photopolymers, UV curable inks}, author = {Layani, Michael and Wang, Xiaofeng and Magdassi, Shlomo} } @article {Friedman-Levi2018-ja, title = {Optimization of liposomal indocyanine green for imaging of the urinary pathways and a proof of concept in a pig model}, journal = {Surgical Endoscopy}, volume = {32}, number = {2}, year = {2018}, pages = {963{\textendash}970}, abstract = {Background: Iatrogenic ureteral injury is an increasing concern in the laparoscopic era, affecting both patient morbidity and costs. Current techniques enabling intraoperative ureteral identification require invasive procedures or radiations. Our aim was to develop a real-time, non-invasive, radiation-free method to visualize ureters, based on near-infrared (NIR) imaging. For this purpose, we interfered with the biliary excretion pathway of the indocyanine green (ICG) fluorophore by loading it into liposomes, enabling renal excretion. In this work, we studied various parameters influencing ureteral imaging. Methods: Fluorescence intensity (FI) of various liposomal ICG sizes and doses were characterized in vitro and subsequently tested in vivo in mice and pigs. Quantification was performed by measuring FI in multiple points and applying the ureteral/retroperitoneum ratio (U/R). Results: The optimal liposomal ICG loading dose was 20\%, for the different liposomes{\textquoteright} sizes tested (30, 60, 100 nm). Higher concentration of ICG decreased FI. In vivo, the optimal liposome size for ureteral imaging was 60 nm, which yielded a U/R of 5.2 $\pm$ 1.7 (p < 0.001 vs. free ICG). The optimal ICG dose was 8 mg/kg (U/R = 2.1 $\pm$ 0.4, p < 0.05 vs. 4 mg/kg). Only urine after liposomal ICG injection had a measurable FI, and not after free ICG injection. Using a NIR-optimized laparoscopic camera, ureters could be effectively imaged in pigs, from 10 min after injection and persisting for at least 90 min. Ureteral peristaltic waves could be clearly identified only after liposomal ICG injection. Conclusions: Optimization of liposomal ICG allowed to visualize enhanced ureters in animal models and seems a promising fluorophore engineering, which calls for further developments.}, keywords = {2018, 5.3.19, existing at 5.3.19, indocyanine green, Liposomes, Minimal invasive surgery, new, Ureteral injury}, author = {Friedman-Levi, Yael and Larush, Liraz and Diana, Michele and Marchegiani, Francesco and Marescaux, Jacques and Goder, Noam and Lahat, Guy and Klausner, Joseph and Eyal, Sara and Magdassi, Shlomo and Nizri, Eran} } @article {Li2018-br, title = {Recent Progress in Solution-Processed Copper-Chalcogenide Thin-Film Solar Cells}, journal = {Energy Technology}, volume = {6}, number = {1}, year = {2018}, pages = {46{\textendash}59}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {Solution-based thin-film semiconductors offer a promising path for the mass production of low-cost solar cells prepared at low temperatures. Thin-film Cu-based chalcogenides such as Cu(In,Ga)(S,Se)2 (CIGSSe) and Cu2ZnSn(S,Se)4 (CZTSSe) hold great promise and have been regarded as viable candidates because of the abundance of their constituent elements and environmentally nontoxic nature. This Review summarizes the recent progress in solution-processed Cu chalcogenides (CuInSe2, Cu(In,Ga)(S,Se)2, Cu2ZnSnS4, Cu2ZnSn(S,Se)4) for thin-film solar cells, with emphasis on the precursor solution deposited by spray pyrolysis and spin coating. The general aspects, current status, and recent research highlights are introduced and analyzed in detail. Finally, the challenges and future prospects of these solar cells are also discussed.}, keywords = {2018, 5.3.19, coating, copper chalcogenide, existing at 5.3.19, Nanoparticles, new, solar cells, thin films}, author = {Li, Wenjie and Tan, Joel Ming Rui and Leow, Shin Woei and Lie, Stener and Magdassi, Shlomo and Wong, Lydia Helena} } @article {Wang2018-vg, title = {Surface engineering on continuous VO2 thin films to improve thermochromic properties: Top-down acid etching and bottom-up self-patterning}, journal = {Journal of Colloid and Interface Science}, volume = {512}, year = {2018}, pages = {529{\textendash}535}, publisher = {Elsevier B.V.}, abstract = {Surface engineering is an effective method to improve the thermochromic performance of VO2. In this paper, an acid-etching top down method was proposed to tailor the VO2 surface morphology from the continuous dense-packed surface to patterned structure, which exhibited the enhanced integrated visible transmittance (Tlum) and the enlarged solar modulating abilities (ΔTsol). Moreover, a self-patterning approach was also illustrated to improve the thermochromic properties. The proposed surface engineering methods represent a facile and cost-effective approach for enhancing thermochromic properties that could promote the application of VO2 thin films in smart windows.}, keywords = {2018, 5.3.19, Acid etching: Smart window, existing at 5.3.19, new, Surface engineering, Thermochromic properties, Vanadium Dioxide}, author = {Wang, Ning and Peh, Yew Keat and Magdassi, Shlomo and Long, Yi} } @article {Ling2018-ea, title = {TiO2-WO3 core-shell inverse opal structure with enhanced electrochromic performance in NIR region}, journal = {Journal of Materials Chemistry C}, volume = {6}, number = {31}, year = {2018}, pages = {8488{\textendash}8494}, publisher = {Royal Society of Chemistry}, abstract = {More than 50\% of solar energy comes from the infrared region (as radiant heat) of the solar spectrum. Electrochromic (EC) materials, which can dynamically modulate the transmittance of infrared (IR) radiation, can be effectively applied in smart windows for thermal management in buildings. In this work, a core-shell TiO2-WO3 inverse opal (IO) structure was fabricated through the electrodeposition of WO3 onto TiO2 IO templates. The TiO2 IO templates were synthesized by introducing TiO2 into the voids of a polystyrene (PS) colloidal crystal template, followed by calcination to remove the PS microspheres. It was found that the TiO2-WO3 IO core-shell structure can modulate NIR transmittance at wavelengths from 700 to 1600 nm in the NIR range when potential is applied in LiClO4/PC electrolyte. When --0.3 V is applied, up to 60\% of NIR radiation in this range can be blocked. The NIR transmittance can be modulated by tuning the applied potential. This study focuses on comparing the novel TiO2-WO3 IO structure with electrodeposited WO3 thin film to fully elucidate the effect of the inverse opal morphology and the TiO2-WO3 hybrid system on the optical properties. Results show that the NIR blockage can be sustained up to 90\% after 1200 reversible cycles for TiO2-WO3 IO structure. The greater surface area of the IO structure increases the number of active sites available for the redox reactions by providing a larger contact area with the electrolyte. The more electroactive area with improved charge transfer enhances the overall NIR transmittance contrast as compared to bulk WO3 thin film. Furthermore, the addition of WO3 to TiO2 to form a composite has been shown to enhance cycling performance and device lifespan.}, keywords = {2018, 5.3.19, existing at 5.3.19, new, TiO2 WO3 core shell electrochromic NIR electrolyte}, author = {Ling, Han and Yeo, Loo Pin and Wang, Zhiwei and Li, Xianglin and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred Iing Yoong} } @article {Wang2018-it, title = {Vanadium dioxide for energy conservation and energy storage applications: Synthesis and performance improvement}, journal = {Applied Energy}, volume = {211}, year = {2018}, pages = {200{\textendash}217}, publisher = {Elsevier Ltd.}, abstract = {Vanadium dioxide (VO2) is one of the most widely studied inorganic phase change material for energy storage and energy conservation applications. Monoclinic VO2 [VO2(M)] changes from semiconducting phase to metallic rutile phase at near room temperature and the resultant abrupt suppressed infrared transmittance at high temperature makes it a potential candidate for thermochromic smart window application to cut the air-condition usage. Meanwhile proper electrical potential, stable structure and good interaction with lithium ions make metastable VO2 [VO2(B)] an attractive material for fabrication of electrodes for batteries and supercapacitors. However, some long-standing issues have plagued its usage. In thermochromic application, high transition temperature (τc), low luminous transmittance (Tlum) and undesirable solar modulation ability (△Tsol) are the key problems, while in energy storage applications, short cycling lifetime and complex three-dimension microstructure are the major challenges. The common methods to produce VO2 polymorph are physical vapour deposition (PVD), chemical vapour deposition (CVD), sol-gel synthesis, and hydrothermal method. CVD is an intensively studied method due to its ability to produce uniform films with precise stoichiometry, phase and morphology control. This paper reviews the various CVD techniques to produce VO2 with controlled phases and the ternary diagram shows the relationship between film stoichiometry and various process conditions. The difference between the various CVD systems are commented and the process window to produce VO2 are tabulated. Some strategies to improve VO2's performance in both energy conservation and energy storage applications are discussed.}, keywords = {2018, 5.3.19, atomic layer deposition, Chemical vapor deposition, existing at 5.3.19, Lithium-ion battery, new, Smart-window, Supercapacitor, Vanadium Dioxide}, author = {Wang, Shancheng and Owusu, Kwadwo Asare and Mai, Liqiang and Ke, Yujie and Zhou, Yang and Hu, Peng and Magdassi, Shlomo and Long, Yi} } @article {8384, title = {3D Printing of Shape Memory Polymers for Flexible Electronic Devices.}, journal = {Adv. Mater. (Weinheim, Ger.)Advanced Materials (Weinheim, Germany)}, volume = {28}, number = {22}, year = {2016}, note = {CAPLUS AN 2015:1557493(Journal; Online Computer File)}, month = {2016///}, pages = {4449 - 4454}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {The authors describe a general and facile method based on 3D printing methacrylated macromonomers to fabricate shape memory objects that can be used in flexible and responsive elec. circuits. Such responsive objects can be used in fabrication of soft robotics, minimal invasive medical devices, sensors, and wearable electronics. The use of 3D printing overcomes the poor processing characteristics of thermosets and enables complex geometries that are not easily accessible by other techniques. [on SciFinder(R)]}, keywords = {three dimensional printing shape memory polymer flexible electronic device}, isbn = {0935-9648}, author = {Zarek, Matt and Layani, Michael and Cooperstein, Ido and Sachyani, Ela and Cohn, Daniel and Magdassi, Shlomo.} } @article {7768, title = {Bio-Inspired Mechanotactic Hybrids for Orchestrating Traction-Mediated Epithelial Migration.}, journal = {Adv. Mater. (Weinheim, Ger.)}, volume = {28}, number = {16}, year = {2016}, note = {CAPLUS AN 2016:336313(Journal; Online Computer File)}, month = {2016///}, pages = {3102 - 3110}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {A platform of mechanotactic hybrids is established by projecting lateral gradients of apparent interfacial stiffness onto the planar surface of a compliant hydrogel layer using an underlying rigid substrate with microstructures inherited from 3D printed molds. Using this platform, the mechanistic coupling of epithelial migration with the stiffness of the extracellular matrix (ECM) is found to be independent of the interfacial compositional and topog. cues. [on SciFinder(R)]}, keywords = {mechanotactic hybrid traction epithelium migration interface stiffness hydrogel}, isbn = {0935-9648}, author = {Cai, Pingqiang and Layani, Michael and Leow, Wan Ru and Amini, Shahrouz and Liu, Zhiyuan and Qi, Dianpeng and Hu, Benhui and Wu, Yun-Long and Miserez, Ali and Magdassi, Shlomo and Chen, Xiaodong.} } @article {7772, title = {Highly Stable Transparent Conductive Silver Grid/PEDOT:PSS Electrodes for Integrated Bifunctional Flexible Electrochromic Supercapacitors.}, journal = {Adv. Energy Mater.}, volume = {6}, number = {4}, year = {2016}, note = {CAPLUS AN 2015:1955738(Journal; Online Computer File)}, month = {2016///}, pages = {n/a}, publisher = {Wiley-Blackwell}, abstract = {Silver grids are attractive for replacing indium tin oxide as flexible transparent conductors. This work aims to improve the electrochem. stability of silver-based transparent conductors. A silver grid/PEDOT:PSS hybrid film with high cond. and excellent stability is successfully fabricated. Its functionality for flexible electrochromic applications is demonstrated by coating one layer of WO3 nanoparticles on the silver grid/PEDOT:PSS hybrid film. This hybrid structure presents a large optical modulation of 81.9\% at 633 nm, fast switching, and high coloration efficiency (124.5 cm2 C-1). More importantly, an excellent electrochem. cycling stability (sustaining 79.1\% of their initial transmittance modulation after 1000 cycles) and remarkable mech. flexibility (optical modulation decay of only 7.5\% after 1200 compressive bending cycles) is achieved. A novel smart supercapacitor is presented that functions as a regular energy-storage device and simultaneously monitors the level of stored energy by a rapid and reversible color variation even at high current charge/discharge conditions. The film sustains an optical modulation of 87.7\% and a specific capacitance of 67.2\% at 10 A g-1 compared to their initial value at a c.d. of 1 A g-1. The high-performance silver grid/PEDOT:PSS hybrid transparent films exhibit promising features for various emerging flexible electronics and optoelectronic devices. [on SciFinder(R)]}, keywords = {electrode bifunctional flexible electrochromic supercapacitor, silver grid PEDOT PSS transparent conductive electrode}, isbn = {1614-6840}, author = {Cai, Guofa and Darmawan, Peter and Cui, Mengqi and Wang, Jiangxin and Chen, Jingwei and Magdassi, Shlomo and Lee, Pooi See.} } @article {7774, title = {High-performance 3D printing of hydrogels by water-dispersible photoinitiator nanoparticles}, journal = {Sci AdvScience advances}, volume = {2}, number = {4}, year = {2016}, note = {MEDLINE AN 2016877417(Journal; Article; (JOURNAL ARTICLE))}, month = {2016///}, pages = {e1501381}, abstract = {In the absence of water-soluble photoinitiators with high absorbance in the ultraviolet (UV)-visible range, rapid three-dimensional (3D) printing of hydrogels for tissue engineering is challenging. A new approach enabling rapid 3D printing of hydrogels in aqueous solutions is presented on the basis of UV-curable inks containing nanoparticles of highly efficient but water-insoluble photoinitiators. The extinction coefficient of the new water-dispersible nanoparticles of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide (TPO) is more than 300 times larger than the best and most used commercially available water-soluble photoinitiator. The TPO nanoparticles absorb significantly in the range from 385 to 420 nm, making them suitable for use in commercially available, low-cost, light-emitting diode-based 3D printers using digital light processing. The polymerization rate at this range is very fast and enables 3D printing that otherwise is impossible to perform without adding solvents. The TPO nanoparticles were prepared by rapid conversion of volatile microemulsions into water-dispersible powder, a process that can be used for a variety of photoinitiators. Such water-dispersible photoinitiator nanoparticles open many opportunities to enable rapid 3D printing of structures prepared in aqueous solutions while bringing environmental advantages by using low-energy curing systems and avoiding the need for solvents.[on SciFinder (R)]}, keywords = {3d printing, Hydrogels, photoinitiator, tpo, uv curing}, isbn = {2375-2548}, author = {Pawar, Amol A. and Saada, Gabriel and Cooperstein, Ido and Larush, Liraz and Magdassi, Shlomo and Jackman, Joshua A. and Tabaei, Seyed R. and Cho, Nam-Joon} } @article {7775, title = {Indocyanine Green Liposomes for Diagnosis and Therapeutic Monitoring of Cerebral Malaria}, journal = {Theranostics}, volume = {6}, number = {2}, year = {2016}, note = {MEDLINE AN 2016708242(Journal; Article; (JOURNAL ARTICLE))}, month = {2016///}, pages = {167 - 76}, abstract = {Cerebral malaria (CM) is a major cause of death of Plasmodium falciparum infection. Misdiagnosis of CM often leads to treatment delay and mortality. Conventional brain imaging technologies are rarely applicable in endemic areas. Here we address the unmet need for a simple, non-invasive imaging methodology for early diagnosis of CM. This study presents the diagnostic and therapeutic monitoring using liposomes containing the FDA-approved fluorescent dye indocyanine green (ICG) in a CM murine model. Increased emission intensity of liposomal ICG was demonstrated in comparison with free ICG. The Liposomal ICG{\textquoteright}s emission was greater in the brains of the infected mice compared to naive mice and drug treated mice (where CM was prevented). Histological analyses suggest that the accumulation of liposomal ICG in the cerebral vasculature is due to extensive uptake mediated by activated phagocytes. Overall, liposomal ICG offers a valuable diagnostic tool and a biomarker for effectiveness of CM treatment, as well as other diseases that involve inflammation and blood vessel occlusion.[on SciFinder (R)]}, keywords = {cerebral malaria, Diagnosis, Imaging, indocyanine green, Liposomes}, isbn = {1838-7640}, author = {Portnoy, Emma and Natalia Vakruk and Ameer Bishara and Shmuel, Miriam and Eyal, Sara and Magdassi, Shlomo and Golenser, Jacob} } @article {7773, title = {Inkjet-printed all solid-state electrochromic devices based on NiO/WO3 nanoparticle complementary electrodes.}, journal = {Nanoscale}, volume = {8}, number = {1}, year = {2016}, note = {CAPLUS AN 2015:1841664(Journal; Online Computer File)}, month = {2016///}, pages = {348 - 357}, publisher = {Royal Society of Chemistry}, abstract = {Nanostructured thin films are important in the fields of energy conversion and storage. In particular, multi-layered nanostructured films play an important role as a part of the energy system for energy saving applications in buildings. Inkjet printing is a low-cost and attractive technol. for patterning and deposition of multi-layered nanostructured materials on various substrates. However, it requires the development of a suitable ink formulation with optimum viscosity, surface tension and evapn. rate for various materials. In this study, a versatile ink formulation was successfully developed to prep. NiO and WO3 nanostructured films with strong adhesion to ITO coated glass using inkjet printing for energy saving electrochromic applications. We achieved a high performance electrochromic electrode, producing porous and continuous electrochromic films without aggregation. The NiO film with 9 printed layers exhibits an optical modulation of 64.2\% at 550 nm and a coloration efficiency (CE) of 136.7 cm2 C-1. An inkjet-printed complementary all solid-state device was assembled, delivering a larger optical modulation of 75.4\% at 633 nm and a higher CE of 131.9 cm2 C-1 among all solid-state devices. The enhanced contrast is due to the printed NiO film that not only performs as an ion storage layer, but also as a complementary electrochromic layer. [on SciFinder(R)]}, keywords = {nickel tungsten oxide nanoparticle electrode inkjet printing electrochromic device}, isbn = {2040-3372}, author = {Cai, Guofa and Darmawan, Peter and Cui, Mengqi and Chen, Jingwei and Wang, Xu and Eh, Alice Lee-Sie and Magdassi, Shlomo and Lee, Pooi See.} } @article {7770, title = {Nanodrawing of Aligned Single Carbon Nanotubes with a Nanopen.}, journal = {Nano Lett.}, volume = {16}, number = {3}, year = {2016}, note = {CAPLUS AN 2016:109546(Journal; Online Computer File)}, month = {2016///}, pages = {1517 - 1522}, publisher = {American Chemical Society}, abstract = {Single-walled carbon nanotubes (SWCNTs) are considered pivotal components for mol. electronics. Techniques for SWCNT lithog. today lack simplicity, flexibility, and speed of direct, oriented deposition at specific target locations. In this paper SWCNTs are directly drawn and placed with chem. identification and demonstrated orientation using fountain pen nanolithog. (FPN) under ambient conditions. Placement across specific elec. contacts with such alignment is demonstrated and characterized. The fundamental basis of the drawing process with alignment has potential applications for other related systems such as inorg. nanotubes, polymers, and biol. mols. [on SciFinder(R)]}, keywords = {carbon nanotube fountain pen nanolithog nanopen}, isbn = {1530-6984}, author = {Yeshua, Talia and Lehmann, Christian and Hubner, Uwe and Azoubel, Suzanna and Magdassi, Shlomo and Campbell, Eleanor E. B. and Reich, Stephanie and Lewis, Aaron.} } @article {7769, title = {Supercapacitors: Highly Stable Transparent Conductive Silver Grid/PEDOT:PSS Electrodes for Integrated Bifunctional Flexible Electrochromic Supercapacitors}, journal = {Adv. Energy Mater.}, volume = {6}, number = {4}, year = {2016}, note = {CAPLUS AN 2016:263104(Journal; Online Computer File)}, month = {2016///}, pages = {n/a}, publisher = {Wiley-Blackwell}, isbn = {1614-6840}, author = {Cai, Guofa and Darmawan, Peter and Cui, Mengqi and Wang, Jiangxin and Chen, Jingwei and Magdassi, Shlomo and Lee, Pooi See.} } @article {3579, title = {3D printing of porous structures by UV-curable O/W emulsion for fabrication of conductive objects.}, journal = {Journal of Materials Chemistry C}, volume = {3}, number = {9}, year = {2015}, note = {101107454}, month = {2015/03/02/}, pages = {2040}, abstract = {The growing interest in the field of three-dimensional printing has led to great demand for new materials. In this paper we should like to present a new ink for printing porous structures that can be used for embedding various functional materials. The ink is composed of a UV polymerizable oil-in-water emulsion which converts into a solid object upon UV irradiation, and upon evaporation of the aqueous phase, forms a porous structure. The 3D objects with their various porosities, were printed by a Digital Light Processing (DLP) printer. The total surface area of the object can be controlled by changing the emulsion{\textquoteright}s droplets size and the dispersed phase fraction. The printed 3D porous structures can be used in a variety of applications, and here we show a composite conductive object, made of silver and cross-linked polymer. After the porous object is formed, the pores are filled by vacuum, dipping in a dispersion of silver nanoparticles, followed by chemical sintering at room temperature, which results in conductive percolation paths within the 3D structure. Application of this structure is demonstrated for use as a 3D connector of an electrical circuit. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry C is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {20507526}, author = {Cooperstein, I. and Layani, M. and Magdassi, S.} } @article {4628, title = {3D Printing of Shape Memory Polymers for Flexible Electronic Devices}, journal = {Advanced Materials}, volume = {28}, year = {2015}, note = {CAPLUS AN 2015:1557493(Journal)}, month = {2015///}, pages = {4449{\textendash}4454}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {The formation of 3D objects composed of shape memory polymers\ for flexible electronics is described. Layer-by-layer photopolymerization of methacrylated semicrystalline molten macromonomers by a 3D digital light processing printer enables rapid fabrication of complex objects and imparts shape memory functionality for electrical circuits.}, isbn = {0935-9648}, author = {Zarek, Matt and Layani, Michael and Cooperstein, Ido and Sachyani, Ela and Cohn, Daniel and Magdassi, Shlomo.} } @article {4634, title = {The Environmentally Benign form of Pesticide in Hydrodispersive Nanometric form with Improved Efficacy Against Adult Mosquitoes at Low Exposure Concentrations}, journal = {Bull Environ Contam ToxicolBulletin of environmental contamination and toxicology}, year = {2015}, note = {MEDLINE AN 2016257669(Journal; Article; (JOURNAL ARTICLE))}, month = {2015///}, abstract = {Permethrin, a poorly water-soluble synthetic pesticide belonging to the pyrethroid family, was formulated into water-dispersive nanometric form by rapid evaporation of pesticide loaded oil-in-water microemulsion. The mean hydrodynamic diameter of Nanopermethrin was found to be 199.01 {\textpm} 1.4 nm. The efficacy of the Nanopermethrin was comparatively investigated with its bulk form against 2-3 days old adult mosquitoes by WHO cone bioassay for 60 min. The median knockdown concentration of Culex tritaeniorhynchus, Culex quinquefasciatus and Aedes albopictus were found to be 7.20 {\texttimes} 10(4), 7.53 {\texttimes} 10(4), 0.42 {\texttimes} 10(3) mg/L for Bulk permethrin, and 0.98 {\texttimes} 10(4), 1.17 {\texttimes} 10(4), 0.05 {\texttimes} 10(3) mg/L for Nanopermethrin, respectively. The obtained results extrapolate the improved efficacy of Nanopermethrin even at low-level concentrations. Hence, the formulated Nanopermethrin will serve as an effective alternative pesticide in controlling the mosquito population with reduced environmental toxicity.[on SciFinder (R)]}, keywords = {contact toxicity, environmental safety, knockdown, Nanopesticide, Permethrin, who cone bioassay}, isbn = {1432-0800}, author = {Balaji, A. P. B. and Mishra, Prabhakar and Suresh, Kumar R. S. and Ashu, Abhijeet and Mukherjee, Amitava and Chandrasekaran, Natarajan and Margulis, Katherine and Magdassi, Shlomo} } @article {4636, title = {Fabrication of Carbon Nanotube/Indium Tin Oxide {\textquotedblleft}Inverse Tandem{\textquotedblright} Absorbing Coatings with Tunable Spectral Selectivity for Solar{\textendash}Thermal Applications}, journal = {Energy Technology}, year = {2015}, publisher = {Wiley Online Library}, isbn = {2194-4296}, author = {Bera, Raj Kumar and Azoubel, Suzanna and Mhaisalkar, Subodh Gautam and Magdassi, Shlomo and Mandler, Daniel} } @article {4631, title = {Fabrication of transparent conducting films composed of In3+ doped CuS and their application in flexible electroluminescent devices.}, journal = {J. Mater. Chem. CJournal of Materials Chemistry C: Materials for Optical and Electronic Devices}, volume = {3}, number = {33}, year = {2015}, note = {CAPLUS AN 2015:1243287(Journal; Online Computer File)}, month = {2015///}, pages = {8700 - 8705}, publisher = {Royal Society of Chemistry}, abstract = {Transparent conductive films composed of CuS were formed by wet deposition on PET at room temp. followed by annealing at 100{\textdegree} for 1 h. The resistance of the films was tuned by doping with In3+. A decrease of over an order of magnitude of the sheet resistance was obtained, from 1721 Ω sq-1 for undoped CuS film to 109 Ω sq-1 for In3+ doped. Transparency of the conducting films could be tuned by an appropriate selection of reaction time and In3+ concn. Films contg. 10 mol\% of In3+ ions after a reaction duration of 24 h have a sheet resistance of \~270 Ω sq-1 and a transparency of \~80\%. The fabricated films are characterized by excellent adhesion to the PET substrate and are suitable for use as transparent conducting electrodes (TCE) in flexible electroluminescent (EL) devices. [on SciFinder(R)]}, keywords = {copper sulfide transparent conducting film indium doping electroluminescent device}, isbn = {2050-7534}, author = {Patel, Dinesh K. and Kamyshny, Alexander and Ariando and Zhen, Huang and Magdassi, Shlomo.} } @article {3582, title = {Formation of hydrophilic nanofibers from nanoemulsions through electrospinningFormation of hydrophilic nanofibers from nanoemulsions through electrospinning}, journal = {International Journal of Pharmaceutics}, volume = {478}, number = {1}, year = {2015}, note = {Accession Number: edselc.2-52.0-84911943387; (International Journal of Pharmaceutics, 15 January 2015, 478(1):172-179) Publication Type: Academic Journal; Rights: Copyright 2014 Elsevier B.V., All rights reserved.}, month = {2015 / 01 / 15 /}, pages = {172-179}, publisher = {Elsevier}, keywords = {Electrospinning, emulsion, Fast dissolving delivery system, Lipophilic nanoparticles, Nanofibers}, isbn = {1873347603785173}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselc\&AN=edselc.2-52.0-84911943387\&site=eds-live}, author = {Gordon, V. and Marom, G. and Magdassi, S.} } @article {S154996341500069620150701, title = {Imaging the urinary pathways in mice by liposomal indocyanine green.}, journal = {Nanomedicine: Nanotechnology, Biology, and Medicine}, volume = {11}, year = {2015}, pages = {1057 - 1064}, abstract = {Intraoperative ureter identification can assist in the prevention of ureteral injury and consequently improve surgery outcomes. Our aim was to take advantage of the altered pharmacokinetics of liposomal indocyanine green (ICG), the only FDA-approved near-infrared (NIR) dye, for imaging of ureters during surgeries. ICG was passively adsorbed to liposomes. NIR whole mice body and isolated tissue imaging were used to study liposomal ICG properties vs. free ICG. In vivo, the urinary bladder could be clearly observed in most of the liposome-treated mice. Liposomal encapsulation of ICG enhanced ureteral emission up to 1.9 fold compared to free ICG (P\<0.01). Increase in liposomal micropolarity and microviscosity and differential scanning calorimetry supported ICG localization within the liposomal bilayer. Our findings suggest that liposomal ICG could be utilized for ureteral imaging intra-operatively, thus potentially improving surgical outcomes.}, issn = {1549-9634}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S1549963415000696\&site=eds-live}, author = {Portnoy, Emma and Nizri, Eran and Golenser, Jacob and Shmuel, Miriam and Magdassi, Shlomo and Eyal, Sara} } @article {3577, title = {Mg/W-codoped vanadium dioxide thin films with enhanced visible transmittance and low phase transition temperature.}, journal = {Journal of Materials Chemistry C}, volume = {3}, number = {26}, year = {2015}, note = {103559106}, month = {2015/07/14/}, pages = {6771}, abstract = {Vanadium dioxide (VO2), with a reversible phase transition near ambient temperature, has been found to be a promising candidate for energy-saving smart windows. However, its use is constrained by its low visible transmission (Tlum) and high transition temperature (τc). In this paper, by codoping tungsten (W) and magnesium (Mg) in VO2, a good combination of low τc (\~35 {\textdegree}C) and high Tlum (81.3\%) was achieved. The τc declines with decreasing Mg doping level in Mg/W-codoped samples, which is the opposite effect of doping with only Mg, suggesting a synergistic effect of the two dopants arising from the e- and h+ carrier neutralization. In addition, the band gap of Mg/W-codoped VO2 was gradually widened; this is attributed to the depressed absorption, which enhanced the Tlum. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry C is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {20507526}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=103559106\&site=eds-live}, author = {Wang, Ning and Liu, Shiyu and Zeng, X. T. and Magdassi, Shlomo and Long, Yi} } @article {4632, title = {Multienzyme Inkjet Printed 2D Arrays.}, journal = {ACS Appl. Mater. InterfacesACS Applied Materials \& Interfaces}, volume = {7}, number = {32}, year = {2015}, note = {CAPLUS AN 2015:1226830(Journal; Online Computer File)}, month = {2015///}, pages = {17985 - 17992}, publisher = {American Chemical Society}, abstract = {The use of printing to produce 2D arrays is well established, and should be relatively facile to adapt for the purpose of printing biomaterials; however, very few studies have been published using enzyme solns. as inks. Among the printing technologies, inkjet printing is highly suitable for printing biomaterials and specifically enzymes, as it offers many advantages. Formulation of the inkjet inks is relatively simple and can be adjusted to a variety of biomaterials, while providing nonharmful environment to the enzymes. Here we demonstrate the applicability of inkjet printing for patterning multiple enzymes in a predefined array in a very straightforward, noncontact method. Specifically, various arrays of the enzymes glucose oxidase (GOx), invertase (INV) and horseradish peroxidase (HP) were printed on aminated glass surfaces, followed by immobilization using glutardialdehyde after printing. Scanning electrochem. microscopy (SECM) was used for imaging the printed patterns and to ascertain the enzyme activity. The successful formation of 2D arrays consisting of enzymes was explored as a means of developing the first surface confined enzyme based logic gates. Principally, XOR and AND gates, each consisting of two enzymes as the Boolean operators, were assembled, and their operation was studied by SECM. [on SciFinder(R)]}, keywords = {multienzyme inkjet printing array immobilization glucose oxidase invertase peroxidase}, isbn = {1944-8244}, author = {Gdor, Efrat and Shemesh, Shay and Magdassi, Shlomo and Mandler, Daniel.} } @article {4633, title = {Novel felt pseudocapacitor based on carbon nanotube/metal oxides.}, journal = {J. Mater. Sci.Journal of Materials Science}, volume = {50}, number = {20}, year = {2015}, note = {CAPLUS AN 2015:1122279(Journal; Online Computer File)}, month = {2015///}, pages = {6578 - 6585}, publisher = {Springer}, abstract = {This work describes a novel supercapacitor electrode based on a glass fiber felt substrate, single-walled carbon nanotube (SWCNT) and metal oxide layers (RuO2 or MnO2). It is fabricated by the repeated and alternate deposition of SWCNTs and metal oxides via dipping and electrodeposition, resp., to achieve three-dimensional layered hierarchical structured supercapacitor electrodes. The results show that the layered structured electrodes fabricated by alternating deposition of SWCNTs and metal oxides have higher capacitance as compared with the bulk deposited samples, which are fabricated by deposition of SWCNTs followed by metal oxides. The best configuration studied in this work shows specific capacitance of 72 and 98 F/g for the SWCNT-MnO2 and SWCNT-RuO2, resp., whereas the corresponding areal capacitances are 0.07 and 0.09 F/cm2. This three-dimensional porous electrode structure design combines the high mech. stability of the felt substrate with the high cond. and sp. surface area of SWCNTs, and the high capacitance of metal oxides. This will add immensely to the research and development of wearable lightwt. electronics in harsh environments. [on SciFinder(R)]}, keywords = {felt pseudocapacitor carbon nanotube metal oxide electrode}, isbn = {0022-2461}, author = {Fam, Derrick W. H. and Azoubel, Sue and Liu, Liang and Huang, Jingfeng and Mandler, Daniel and Magdassi, Shlomo and Tok, Alfred I. Y.} } @article {3575, title = {Pharmaceutical nanotechnology: Formation of hydrophilic nanofibers from nanoemulsions through electrospinning}, journal = {International Journal of Pharmaceutics}, volume = {478}, year = {2015}, note = {Accession Number: S0378517314008503; Author: Gordon, V.; Author: Marom, G. (⁎); Author: Magdassi, S. (⁎⁎); Affiliation: Casali Center for Applied Chemistry, The Institute of Chemistry and The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem, Israel; Number of Pages: 8; Language: English;}, month = {2015/1/15/15 Jan}, pages = {172 - 179}, publisher = {Elsevier B.V.}, abstract = {This study presents a method for one step incorporation of lipophilic compounds in hydrophilic nanofibers. By this method nanodroplets of oil and of volatile solvent are entrapped within polymer nanofibers during an electrospinning process. While performing the process with a volatile oil with dissolved lipophilic material, such as the drug celecoxib, nanofiber{\textendash}nanoparticle composites are formed. The polymer used to form the fibers is a high molecular weight poly(vinyl alcohol) which enables rapid dissolution and release of the incorporated lipophilic material. The resulting celecoxib nanoparticles that are embedded within the nanofiber are amorphous and their average size is in between 21 and 93nm, thus potentially lead to their increased dissolution rate. The preparation of such a solid matrix containing nanodroplets or nanoparticles may be applied as a fast dissolving delivery system for water insoluble materials.}, isbn = {0378-5173}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S0378517314008503\&site=eds-live}, author = {Gordon, V. and Marom, G. and Magdassi, S.} } @article {ADMI:ADMI201570014, title = {Printed Electronics: Printing a Self-Reducing Copper Precursor on 2D and 3D Objects to Yield Copper Patterns with 50\% Copper{\textquoteright}s Bulk Conductivity}, journal = {Advanced Materials Interfaces}, volume = {2}, number = {3}, year = {2015}, pages = {1400448}, abstract = {The patterning of various 2D and 3D substrates\ is accomplished using a new method, reactive transfer printing, combined with a self-reducing copper precursor. The ink composed of the metal precursor is printed on a donor substrate; during its decomposition, the metal is transferred to an acceptor substrate. This process is demonstrated with copper formate as the precursor, forming a copper pattern with excellent conductivity (50\% that of bulk copper).}, keywords = {conductive materials, copper formate, cuprous formate, inks, printed electronics}, issn = {2196-7350}, doi = {10.1002/admi.201570014}, author = {Rosen, Yitzchak and Grouchko, Michael and Magdassi, Shlomo} } @article {4510, title = {Self-Assembly of Perovskite for Fabrication of Semitransparent Perovskite Solar Cells.}, journal = {Adv. Mater. InterfacesAdvanced Materials Interfaces}, volume = {2}, number = {12}, year = {2015}, note = {CAPLUS AN 2015:1348143(Journal; Online Computer File)}, month = {2015///}, pages = {n/a}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, abstract = {This work reports on the prepn. of semitransparent perovskite solar cells. The cells transparency is achieved through a unique wet deposition technique that creates perovskite grids with various dimensions. The perovskite grid is deposited on a mesoporous TiO2 layer, followed by hole transport material deposition and evapn. of a semitransparent gold film. Control of the transparency of the solar cells is achieved by changing the perovskite soln. concn. and the mesh openings. The semitransparent cells demonstrate 20-70\% transparency with a power conversion efficiency of 5\% at 20\% transparency. This is the first demonstration of the possibility to create a controlled perovskite pattern using a direct mesh-assisted assembly deposition method for fabrication of a semitransparent perovskite-based solar cell. [on SciFinder(R)]}, isbn = {2196-7350}, author = {Aharon, Sigalit and Layani, Michael and Cohen, Bat-El and Shukrun, Efrat and Magdassi, Shlomo and Etgar, Lioz.} } @article {3581, title = {Self-reduction of a copper complex MOD ink for inkjet printing conductive patterns on plasticsSelf-reduction of a copper complex MOD ink for inkjet printing conductive patterns on plastics}, journal = {Chemical Communications}, volume = {51}, number = {9}, year = {2015}, note = {Accession Number: edselc.2-52.0-84921289833; (Chemical Communications, 31 January 2015, 51(9):1587-1590) Publication Type: Academic Journal; Rights: Copyright 2015 Elsevier B.V., All rights reserved.}, month = {2015 / 01 / 31 /}, pages = {1587-1590}, publisher = {Royal Society of Chemistry}, abstract = {Highly conductive copper patterns on low-cost flexible substrates are obtained by inkjet printing a metal complex based ink. Upon heating the ink, the soluble complex, which is composed of copper formate and 2-amino-2-methyl-1-propanol, decomposes under nitrogen at 140 {\textdegree}C and is converted to pure metallic copper. The decomposition process of the complex is investigated and a suggested mechanism is presented. The ink is stable in air for prolonged periods, with no sedimentation or oxidation problems, which are usually encountered in copper nanoparticle based inks. \ }, isbn = {1364548X13597345}, author = {Farraj, Y. and Grouchko, M. and Magdassi, S.} } @article {3578, title = {Solution-based fabrication of VO2 (M) nanoparticles via lyophilisation.}, journal = {RSC Advances}, volume = {5}, number = {33}, year = {2015}, note = {101634236}, month = {2015/04/17/}, pages = {25669}, isbn = {20462069}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=101634236\&site=eds-live}, author = {Cao, Xun and Thet, Myat Noe and Zhang, Yu and Joachim Loo, Say Chye and Magdassi, Shlomo and Yan, Qingyu and Long, Yi} } @article {3580, title = {Vanadium dioxide nanogrid films for high transparency smart architectural window applicationsVanadium dioxide nanogrid films for high transparency smart architectural window applications}, journal = {Optics Express}, volume = {23}, number = {3}, year = {2015}, note = {Accession Number: edselc.2-52.0-84922784380; (Optics Express, 9 February 2015, 23(3):A124-A132) Publication Type: Academic Journal; Rights: Copyright 2015 Elsevier B.V., All rights reserved.}, month = {2015 / 02 / 09 /}, pages = {A124-A132}, publisher = {Optical Society of American (OSA)}, isbn = {10944087}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselc\&AN=edselc.2-52.0-84922784380\&site=eds-live}, author = {Liu, C. and Long, Y. and Balin, I. and Abdulhalim, I. and Magdassi, S.} } @article {edsgcl.39794913320150101, title = {Wet deposition of carbon nanotube black coatings for stray light reduction in optical systems.}, journal = {Surface \& Coatings Technology}, year = {2015}, pages = {21}, abstract = {Stray light, also known as optical noise, affects the performance of many optical devices. It can be reduced to a tolerable level by well-designed and well-baffled system or/and by using functional black coatings that are fabricated in a complex and costly process. Carbon nanotubes (CNTs) absorb light strongly, making them an ideal candidate for realizing a super black coating. CNT coatings were formed by spraying formulations composed of a silicon binder and low cost multiwalled CNTs on a pre-heated aluminum plate. The diffuse reflectance of the coatings in the VIS range (350-800nm) was in the range of 2.6-5.11\%, depending on the MWCNT concentration in the coating. In the NIR range (850-2400nm), the reflectance values were in the range of 4-6.5\%, however the dependence on MWCNT concentration was not very significant. Excellent adhesion to the aluminum substrates was achieved, for coatings with CNT concentration below 15\%, while still having very low reflectance, even at temperature c}, keywords = {Aluminum, Coatings, Coatings industry, Nanotubes, Plates}, issn = {0257-8972}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edsgao\&AN=edsgcl.397949133\&site=eds-live}, author = {Azoubel, Suzanna and Cohen, Rina and Magdassi, Shlomo} } @article {3625, title = {Active curcumin nanoparticles formed from a volatile microemulsion template.}, journal = {Journal of Materials Chemistry B}, volume = {2}, number = {26}, year = {2014}, note = {100343362}, month = {2014/07/10/}, pages = {3745}, abstract = {We report on the biological performance of organic nanoparticles formed by a simple method based on rapid solvent removal from a volatile microemulsion. The particular focus of the study was on testing the suitability of the method for substances soluble in partially water-miscible organic solvents as well as on evaluating the therapeutic activity of the resultant nanoparticles. Curcumin was employed as a model for hydrophobic drugs, and, as it is soluble in water-miscible organic solvents, it was successfully incorporated into a new cyclopentanone-water microemulsion system. During rapid solvent removal by spray-drying, the nanometric droplets of the microemulsion were converted into nanoparticles containing amorphous curcumin with an average size of 20.2 {\textpm} 3.4 nm, having a ζ potential of -36.2 {\textpm} 1.8 mV. These nanoparticles were dispersible in water and retained the high loading of the active substance. The therapeutic activity of the resulting nanoparticles was demonstrated in a pancreatic cancer cell line, PANC-1. The effective concentration for reducing the metabolic activity by 50\% (EC50) was found to be 11.5 mM for nanoparticles compared with 19.5 {\textmu}M for free curcumin. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry B is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {2050750X}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=100343362\&site=eds-live}, author = {Margulis, K. and Srinivasan, S. and Ware, M. J. and Summers, H. D. and Godin, B. and Magdassi, S.} } @article {3626, title = {Active curcumin nanoparticles formed from a volatile Microemulsion template.}, journal = {Journal of Materials Chemistry B}, volume = {2}, number = {24}, year = {2014}, note = {100188238}, month = {2014/06/24/}, pages = {3745}, abstract = {We report on the biological performance of organic nanoparticles formed by a simple method based on rapid solvent removal from a volatile microemulsion. The particular focus of the study was on testing the suitability of the method for substances soluble in partially water-miscible organic solvents as well as on evaluating the therapeutic activity of the resultant nanoparticles. Curcumin was employed as a model for hydrophobic drugs, and, as it is soluble in water-miscible organic solvents, it was successfully incorporated into a new cyclopentanone-water microemulsion system. During rapid solvent removal by spray-drying, the nanometric droplets of the microemulsion were converted into nanoparticles containing amorphous curcumin with an average size of 20.2 {\textpm} 3.4 nm, having a ς potential of -36.2 {\textpm} 1.8 mV. These nanoparticles were dispersible in water and retained the high loading of the active substance. The therapeutic activity of the resulting nanoparticles was demonstrated in a pancreatic cancer cell line, PANC-1. The effective concentration for reducing the metabolic activity by 50\% (EC50) was found to be 11.5 {\textmu}M for nanoparticles compared with 19.5 {\textmu}M for free curcumin. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry B is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {2050750X}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=100188238\&site=eds-live}, author = {Magdassi, S. and Margulis, K. and Srinivasan, S. and Godin, B. and Ware, M. J. and Summers, H. D.} } @article {3609, title = {Anti-proliferative Activity of Nano-Formulated Phenolato Titanium(IV) Complexes Against Cancer Cells}, number = {6}, year = {2014}, note = {Item Citation: ChemMedChem. June 2014, Vol. 9 Issue 6, p1294, 5 p.Accession Number: edsgcl.369045828; Publication Type: Academic Journal; Source: ChemMedChem; Language: English; Publication Date: 20140601; Rights: Copyright 2014 Gale, Cengage Learning. All rights reserved.; Imprint: Wiley Subscription Services, Inc.}, month = {2014///}, pages = {1294}, publisher = {Wiley Subscription Services, Inc.}, keywords = {cancer, Colorectal cancer, Drug resistance, Lymphomas}, isbn = {1860-7179}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edsgao\&AN=edsgcl.369045828\&site=eds-live}, author = {Meker, Sigalit and Margulis-Goshen, Katrin and Weiss, Ester and Braitbard, Ori and Hochman, Jacob and Magdassi, Shlomo and Tshuva, Edit Y.} } @article {3620, title = {Biomedical Imaging of Colorectal Cancer by Near Infrared Fluorescent Nanoparticles}, journal = {Journal of biomedical nanotechnology}, volume = {10}, number = {6}, year = {2014}, month = {JUN, 2014}, pages = {1041 - 1048}, abstract = {In this paper we describe the preparation of novel Near Infrared (NIR) fluorescent nanoparticles for application in medical imaging of colorectal tumors. The nanoparticles are prepared by using only non-covalent binding processes of molecules which are approved for clinical use. The preparation process is based on the precipitation of a polycation, Eudragit-RS, followed by sequential adsorption of a blocking protein, sodium caseinate, NIR fluorescent dye, Indocyanine Green (ICG) and optionally, a targeting molecule, anti-CEA antibody. Fluorescence measurements have shown that these nanoparticles have higher resistance to photobleaching and higher quantum yield relatively to free ICG. Imaging experiments in orthotopic colorectal cancer mice models have shown that these fluorescent nanoparticles are capable of binding to LS174T human colon tumors in vivo with high specificity, even without the targeting molecule. These nanoparticles, composed of all FDA approved materials, open the way to clinical bioimaging and diagnostics of colon cancer.}, keywords = {Biomaterials, Colorectal cancer, Fluorescence, indocyanine green, MATERIALS SCIENCE, Nanoparticles, NANOSCIENCE \& NANOTECHNOLOGY, NIR Imaging}, isbn = {15507033}, author = {Tivony, R and Larush, L. and Sela-Tavor, O and Magdassi, S.} } @article {3606, title = {Conductive Nanomaterials for Printed Electronics}, journal = {Small}, volume = {10}, number = {17}, year = {2014}, note = {Item Citation: Small. Sept 10, 2014, Vol. 10 Issue 17, p3515, 21 p.Accession Number: edsgcl.398199660; Publication Type: Academic Journal; Source: Small; Language: English; Publication Date: 20140910; Rights: Copyright 2014 Gale, Cengage Learning. All rights reserved.; Imprint: Wiley Subscription Services, Inc.}, month = {2014///}, pages = {3515-3535}, publisher = {Wiley Subscription Services, Inc.}, abstract = {This is a review on recent developments in the field of conductive nanomaterials and their application in printed electronics, with particular emphasis on inkjet printing of ink formulations based on metal nanoparticles, carbon nanotubes, and graphene sheets. The review describes the basic properties of conductive nanomaterials suitable for printed electronics (metal nanoparticles, carbon nanotubes, and graphene), their stabilization in dispersions, formulations of conductive inks, and obtaining conductive patterns by using various sintering methods. Applications of conductive nanomaterials for electronic devices (transparent electrodes, metallization of solar cells, RFID antennas, TFTs, and light emitting devices) are also briefly reviewed.}, isbn = {1613-6810}, author = {Kamyshny, Alexander and Magdassi, Shlomo} } @article {3616, title = {Controlling adhesion properties of SWCNT-PET films prepared by wet depositionControlling adhesion properties of SWCNT-PET films prepared by wet deposition}, journal = {ACS Applied Materials and Interfaces}, volume = {6}, number = {12}, year = {2014}, note = {Accession Number: edselc.2-52.0-84903550860; (ACS Applied Materials and Interfaces, 25 June 2014, 6(12):9265-9271) Publication Type: Academic Journal; Rights: Copyright 2014 Elsevier B.V., All rights reserved.}, month = {2014 / 06 / 25 /}, pages = {9265-9271}, publisher = {American Chemical Society}, keywords = {adhesion, carbon nanotubes film, chemical treatment, transparent and flexible electrodes}, isbn = {1944825219448244}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselc\&AN=edselc.2-52.0-84903550860\&site=eds-live}, author = {Azoubel, S. and Magdassi, S.} } @article {3623, title = {Europium Doped Vanadium Dioxide Material: Reduced Phase Transition Temperature, Enhanced Luminous Transmittance and Solar Modulation}, volume = {6}, number = {3}, year = {2014}, month = {MAR, 2014}, pages = {558 - 561}, abstract = {Vanadium dioxide is a well-known near room temperature phase transition material with a transition temperature (tau(C)) at 68 degrees C. In this paper, Eu3+ dopant with different doping levels was introduced into the crystal lattice of VO2. The thermochromic properties, including the integrated visible transmittance (T-lum) and the solar modulating ability (Delta T-sol) were favorably affected by the Eu-doping. It is of great interest that the substitution of V4+ by Eu3+ in the VO2 crystal structure reduced the tau(C) from 68 degrees C to 47.5 degrees C with an approximate decreasing rate of 6.5 degrees C/at\% up to 4 at\%. More importantly, the Eu dopant helped in improving the properties of luminous transmittance and solar modulating ability, which were difficult to be achieved by other dopants.}, keywords = {Applied, Europium-Doping, MATERIALS SCIENCE, Multidisciplinary, NANOSCIENCE \& NANOTECHNOLOGY, Physics, Sol-Gel, Thermochromic Property, Vanadium Dioxide}, isbn = {19472935}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edswsc\&AN=000332038300019\&site=eds-live}, author = {Cao, X. and Wang, N and Magdassi, S. and Mandler, D and Long, Y.} } @article {3605, title = {Fabrication of Flexible Thermoelectric Thin Film Devices by Inkjet Printing}, number = {17}, year = {2014}, note = {Item Citation: Small. Sept 10, 2014, Vol. 10 Issue 17, p3551, 4 p.Accession Number: edsgcl.398199662; Publication Type: Academic Journal; Source: Small; Language: English; Publication Date: 20140910; Rights: Copyright 2014 Gale, Cengage Learning. All rights reserved.; Imprint: Wiley Subscription Services, Inc.}, month = {2014///}, pages = {3551}, publisher = {Wiley Subscription Services, Inc.}, keywords = {Dielectric films, Digital printing system, Monochrome printer, Printer accessory, Printers (Computers), thin films}, isbn = {1613-6810}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edsgao\&AN=edsgcl.398199662\&site=eds-live}, author = {Lu, Ziyang and Layani, Michael and Zhao, Xiaoxu and Tan, Li Ping and Sun, Ting and Fan, Shufen and Yan, Qingyu and Magdassi, Shlomo and Hng, Huey Hoon} } @article {3610, title = {Formation of curcumin nanoparticles by flash nanoprecipitation from emulsions}, journal = {Journal of Colloid And Interface Science}, volume = {434}, year = {2014}, note = {Accession Number: S0021979714005384; Author: Margulis, Katherine (a, ⁎); Author: Magdassi, Shlomo (a); Author: Lee, Han Seung (b); Author: Macosko, Christopher W. (b); Affiliation: Casali Institute of Applied Chemistry, Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; Affiliation: Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, MN 55455, USA; Number of Pages: 6; Language: English;}, month = {2014/11/15/15 No}, pages = {65 - 70}, publisher = {Elsevier Inc.}, abstract = {{\textbullet}A new method for production of organic nanoparticles is demonstrated for curcumin.{\textbullet}The method is based on flash nanoprecipitation from partially water-soluble emulsions.{\textbullet}A simple hand-operated mixer is employed for flash nanoprecipitation process.{\textbullet}Dry nanometric powders obtained by spray drying are easily dispersible in water.{\textbullet}The resultant particles are 40nm in diameter and contain above 20wt\% active substance.Nanometric particles of a model hydrophobic substance curcumin were prepared by a novel method, namely, flash nanoprecipitation from a coarse oil-in-water emulsion. The method employs turbulent co-mixing of water with curcumin-loaded emulsion using manually-operated confined impingement jets mixer. A clear and stable dispersion of nanoparticles was formed in this process, and could be converted to dry, easily water-dispersible powder by spray drying. The mean size of the particles was about 40nm by DLS, confirmed by Cryo-TEM. The obtained particles contained 20.4wt\% curcumin, X-ray analysis showed it was amorphous. The significant advantages of the studied process are its feasibility, speed and low cost. It does not require any special high-energy input equipment to reduce the droplet size of the initial emulsion as required by the vast majority of other methods, and relies on rapid turbulent mixing and on flow-induced shear stress formed in the simple, manually-operated mixer. Control experiments clearly indicate that employing emulsion, instead of a plain solution and flash nanoprecipitation instead of a simple antisolvent precipitation are advantageous in terms of particle size and stability.}, isbn = {0021-9797}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S0021979714005384\&site=eds-live}, author = {Margulis, Katherine and Magdassi, Shlomo and Lee, Han Seung and Macosko, Christopher W.} } @article {3635, title = {Formation of hydrophilic nanofibers from nanoemulsions through electrospinning.}, journal = {International Journal Of PharmaceuticsInt J Pharm}, volume = {478}, number = {1}, year = {2014}, note = {Accession Number: 25448579. Language: English. Date Revised: 20141216. Date Created: 20141215. Update Code: 20150624. Publication Type: JOURNAL ARTICLE. Journal ID: 7804127. Publication Model: Print-Electronic. Cited Medium: Internet. NLM ISO Abbr: Int J Pharm. Linking ISSN: 03785173. Date of Electronic Publication: 2014 Nov 15. ; Original Imprints: Publication: Amsterdam, Elsevier/North-Holland Biomedical Press.}, month = {2014/11/15}, pages = {172 - 179}, publisher = {Elsevier/North-Holland Biomedical Press}, abstract = {This study presents a method for one step incorporation of lipophilic compounds in hydrophilic nanofibers. By this method nanodroplets of oil and of volatile solvent are entrapped within polymer nanofibers during an electrospinning process. While performing the process with a volatile oil with dissolved lipophilic material, such as the drug celecoxib, nanofiber-nanoparticle composites are formed. The polymer used to form the fibers is a high molecular weight poly(vinyl alcohol) which enables rapid dissolution and release of the incorporated lipophilic material. The resulting celecoxib nanoparticles that are embedded within the nanofiber are amorphous and their average size is in between 21 and 93nm, thus potentially lead to their increased dissolution rate. The preparation of such a solid matrix containing nanodroplets or nanoparticles may be applied as a fast dissolving delivery system for water insoluble materials.; Copyright {\textcopyright} 2014 Elsevier B.V. All rights reserved.}, keywords = {Electrospinning, emulsion, Fast dissolving delivery system, Lipophilic nanoparticles, Nanofibers}, isbn = {1873-3476}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=cmedm\&AN=25448579\&site=eds-live}, author = {Gordon, V. and Marom, G. and Magdassi, S.} } @article {3632, title = {Hydrolysis Resistant Salan Titanium(IV) Anti-cancer Agents in Nanoparticles}, volume = {19}, year = {2014}, month = {MAR, 2014}, pages = {S650 - S650}, keywords = {Biochemistry \& Molecular Biology, chemistry, INORGANIC \& NUCLEAR}, isbn = {09498257}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edswsc\&AN=000332835300586\&site=eds-live}, author = {Meker, S and Margulis-Goshen, K and Magdassi, S. and Tshuva, EY} } @article {3621, title = {Inkjet printing of flexible high-performance carbon nanotube transparent conductive films by "coffee ring effect"}, journal = {Nanoscale}, volume = {6}, number = {19}, year = {2014}, note = {Accession Number: edselc.2-52.0-84907145498; (Nanoscale, 7 October 2014, 6(19):11084-11089) Publication Type: Academic Journal; Rights: Copyright 2014 Elsevier B.V., All rights reserved.}, month = {2014 / 10 / 07 /}, pages = {11084-11089}, publisher = {Royal Society of Chemistry}, isbn = {2040337220403364}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselc\&AN=edselc.2-52.0-84907145498\&site=eds-live}, author = {Shimoni, A. and Azoubel, S. and Magdassi, S.} } @article {3630, title = {Inside Back Cover: Photoactive Nanocrystals by Low-Temperature Welding of Copper Sulfide Nanoparticles and Indium Sulfide Nanosheets (ChemSusChem 12/2014).}, journal = {ChemSusChem}, volume = {7}, number = {12}, year = {2014}, note = {99777767}, month = {2014/12//}, pages = {3549}, abstract = {The cover page of the December 2014 issue of the journal "Chemistry and Sustainability" is presented.}, keywords = {chalcogens, chemistry, coalescence, Copper, solar cells, SUSTAINABILITY, welding}, isbn = {18645631}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=99777767\&site=eds-live}, author = {Lim, Hui Min and Tan, Jia Yi and Batabyal, Sudip K. and Magdassi, Shlomo and Mhaisalkar, Subodh G. and Wong, Lydia H.} } @article {3636, title = {Low pressure mediated enhancement of nanoparticle and macromolecule loading into porous silicon structures.}, journal = {Mesoporous BiomaterialsMesoporous Biomater}, volume = {1}, number = {1}, year = {2014}, note = {Accession Number: 25485265. Language: English. Date Revised: 20141210. Date Created: 20141208. Update Code: 20150624. Publication Type: JOURNAL ARTICLE. Journal ID: 101634696. Publication Model: Print. Cited Medium: Print. NLM ISO Abbr: Mesoporous Biomater. Grant Information: U54 CA143837 United States CA NCI NIH HHS; U54 CA151668 United States CA NCI NIH HHS Date of Electronic Publication: 20140101. ; Original Imprints: Publication: Berlin : De Gruyter}, month = {2014}, publisher = {De Gruyter}, abstract = {Ensuring drug loading efficiency and consistency is one of the most critical stages in engineering drug delivery vectors based on porous materials. Here we propose a technique to significantly enhance the efficiency of loading by employing simple and widely available methods: applying low pressure with and without centrifugation. Our results point toward the advantages the proposed method over the passive loading, especially where the size difference of loaded materials and the pore size of the porous silicon particles is smaller, an increase up to 20-fold can be observed. The technique described in the study can be used for efficient and reproducible loading of porous materials with therapeutic molecules, nanoparticles and contrast imaging agents for biomedical application.;}, isbn = {2300-2271}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=cmedm\&AN=25485265\&site=eds-live}, author = {Leonard, Fransisca and Margulis-Goshen, Katrin and Liu, Xuewu and Srinivasan, Srimeenakshi and Magdassi, Shlomo and Godin, Biana} } @article {3627, title = {Merging of metal nanoparticles driven by selective wettability of silver nanostructures}, journal = {Nature communications}, volume = {5}, year = {2014}, month = {JAN, 2014}, abstract = {The welding and sintering of nanomaterials is relevant, for example, to form electrical contacts between metallic particles in printed electronic devices. Usually the welding of nanoparticles is achieved at high temperatures. Here we find that merging of two different metals, silver and gold nanoparticles, occurs on contact at room temperature. The merging process was investigated by experimental and molecular dynamics simulations. We discovered that the merging of these particles is driven by selective wettability of silver nanoparticles, independent of their size and shape (spheres or rods); silver behaves as a soft matter, whereas gold as a hard surface being wetted and retaining its original morphology. During that process, the silver atoms move towards the surface of the Au nanoparticles and wrap the Au nanoparticles in a pulling up-like process, leading to the wetting of Au nanoparticles.}, keywords = {MULTIDISCIPLINARY SCIENCES}, isbn = {20411723}, author = {Grouchko, M. and Roitman, P and Zhu, X and Popov, I and Kamyshny, A. and Su, HB and Magdassi, S.} } @article {3634, title = {Merging of metal nanoparticles driven by selective wettability of silver nanostructures.}, journal = {Nature Communications}, volume = {5}, number = {1}, year = {2014}, note = {96417056}, month = {2014/01//}, pages = {3213}, isbn = {20411723}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=96417056\&site=eds-live}, author = {Grouchko, Michael and Roitman, Polina and Zhu, Xi and Popov, Inna and Kamyshny, Alexander and Su, Haibin and Magdassi, Shlomo} } @article {3617, title = {"Nano to nano" electrodeposition of WO3 crystalline nanoparticles for electrochromic coatings{\textdagger}.}, journal = {Journal of Materials Chemistry A}, volume = {2}, number = {38}, year = {2014}, note = {100297980}, month = {2014/10/09/}, pages = {16224}, abstract = {A "nano to nano" electrodeposition approach for preparing nano-structured thin films from the dispersion of nano-objects is reported. A typical WO3 system is demonstrated, where nanocrystalline films are electrodeposited onto transparent conductive electrodes such as ITO and Ag grid printed PET (Ag grid/PET) from the water dispersion of WO3 nanoparticles without applying high potential, adding surfactants or polymers. The process is based on the reduction of WO3, which eliminates the electrostatic repulsion between the nanoparticles causing film deposition on the cathode. The reduced WO3 (HWO3) is conductive, thus it allows further film growth towards higher thickness and coverage. The electrodeposited films consist of stacked crystalline nanoparticles, which provide a highly active surface area, facilitate the penetration of electrolyte and the intercalation/deintercalation of Li+ in the nanocrystals and therefore result in outstanding electrochromic performance and stability (92\% contrast, 9 s coloring and 15 s bleaching, retaining 76\% contrast after 1000 coloring-bleaching cycles). The thickness, electrochromic performance and surface coverage of the films are well tuned by potential and time. This novel "nano to nano" electrodeposition approach based on the electrochemical redox of nano-objects can be extended to various transition metal oxide nano-objects with different sizes and shapes. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry A is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {20507488}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=100297980\&site=eds-live}, author = {Liu, Liang and Layani, Michael and Yellinek, Shai and Kamyshny, Alexander and Ling, Han and Lee, Pooi See and Magdassi, Shlomo and Mandler, Daniel} } @article {3624, title = {Nanoporous Thermochromic VO2 (M) Thin Films: Controlled Porosity, Largely Enhanced Luminous Transmittance and Solar Modulating Ability}, volume = {30}, number = {6}, year = {2014}, month = {FEB 18, 2014}, pages = {1710 - 1715}, abstract = {Vanadium dioxide is the most widely researched thermochromic material with a phase transition temperature (tau(c)) of around 68 degrees C, and its thermochromic performance can be enhanced by adding nanoporosity. Freeze-drying has been employed to fabricate nanostructures with different porosities from 16 to 45\% by varying the prefreezing temperature and precursor concentration. The luminous transmittance (T-lum) and solar modulating ability (Delta T-sol) are greatly enhanced as a result of increasing pore size and pore density. The freeze-dried sample with 7.5 mL of H2O2 precursor dip-coated at 300 mm/min gives the best combination of thermochromic properties (T-lum approximate to 50\%, Delta T-sol = 14.7\%), which Surpasses the best combined thermochromic performance reported to date that we are aware of (T-lum approximate to 41\%, Delta T-sol = 14.1\%).}, keywords = {chemistry, MATERIALS SCIENCE, Multidisciplinary, Physical}, isbn = {07437463}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edswsc\&AN=000331774400029\&site=eds-live}, author = {Cao, X. and Wang, N and Law, J.Y. and Loo, SCJ and Magdassi, S. and Long, Y.} } @article {3637, title = {Nanoporous Thermochromic VO2(M) Thin Films:Controlled Porosity, Largely Enhanced Luminous Transmittance and Solar Modulating Ability.}, journal = {Langmuir}, volume = {30}, number = {6}, year = {2014}, note = {Accession Number: 94510232; Cao, Xun 1 Wang, Ning 1 Law, Jia Yan 1 Loo, Say Chye Joachim 1 Magdassi, Shlomo 1 Long, Yi 1; Affiliation: 1: {\textdagger}Schoolof Materials Science and Engineering and {\textdaggerdbl}Facility for Analysis, Characterization,Testing and Simulation, Nanyang TechnologicalUniversity, 50 NanyangAvenue, Singapore639798; Source Info: Feb2014, Vol. 30 Issue 6, p1710; Subject Term: NANOPOROUS materials; Subject Term: THERMOCHROMISM; Subject Term: THIN films {\textendash} Magnetic properties; Subject Term: FREEZING; Subject Term: TRANSMITTANCE (Physics); Subject Term: POROUS materials; Number of Pages: 6p; Document Type: Article}, month = {2014/02/18/}, pages = {1710 - 1715}, abstract = {Vanadiumdioxide is the most widely researched thermochromic materialwith a phase transition temperature (τc) of around68 {\textdegree}C, and its thermochromic performance can be enhanced by addingnanoporosity. Freeze-drying has been employed to fabricate nanostructureswith different porosities from 16 to 45\% by varying the prefreezingtemperature and precursor concentration. The luminous transmittance(Tlum) and solar modulating ability (ΔTsol) are greatly enhanced as a result of increasingpore size and pore density. The freeze-dried sample with 7.5 mL ofH2O2precursor dip-coated at 300 mm/min givesthe best combination of thermochromic properties (Tlum≈ 50\%, ΔTsol= 14.7\%), which surpasses the best combined thermochromic performancereported to date that we are aware of (Tlum≈ 41\%, ΔTsol= 14.1\%). [ABSTRACT FROM AUTHOR]Copyright of Langmuir is the property of American Chemical Society and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, keywords = {FREEZING, NANOPOROUS materials, Porous materials, THERMOCHROMISM, THIN films {\textendash} Magnetic properties, TRANSMITTANCE (Physics)}, isbn = {07437463}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=aph\&AN=94510232\&site=eds-live}, author = {Cao, Xun and Wang, Ning and Law, Jia Yan and Joachim Loo, Say Chye and Magdassi, Shlomo and Long, Yi} } @article {4512, title = {Nanostructured electrochromic films by inkjet printing on large area and flexible transparent silver electrodes.}, journal = {NanoscaleNanoscale}, volume = {6}, number = {9}, year = {2014}, note = {CAPLUS AN 2014:601543(Journal; Online Computer File)}, month = {2014///}, pages = {4572 - 4576}, publisher = {Royal Society of Chemistry}, abstract = {Printed electrochromic flexible films were obtained by combining transparent silver grid electrodes formed by self-assembly and inkjet printed WO3 nanoparticles. Concd. dispersions of WO3 nanoparticles were inkjet printed on transparent plastic silver grid electrodes with a high transparency of 83\% in the spectral range of 400-800 nm, and a low sheet resistance in the range of 1-5 Ω sq-1. These electrodes were used for electrochromic applications for the first time. The resultant patterned nanostructured electrochromic films maintained their coloring and bleaching performance after bending of the flexible films. [on SciFinder(R)]}, keywords = {nanostructured electrochromic film inkjet printing flexible transparent silver electrode}, isbn = {2040-3372}, author = {Layani, Michael and Darmawan, Peter and Foo, Wan Ling and Liu, Liang and Kamyshny, Alexander and Mandler, Daniel and Magdassi, Schlomo and Lee, Pooi See.} } @article {3614, title = {A novel non-selective coating material for solar thermal potential application formed by reaction between sol{\textendash}gel titania and copper manganese spinel}, journal = {Solar Energy Materials and Solar Cells}, volume = {120}, number = {Part A}, year = {2014}, note = {Accession Number: S0927024813004030; Author: Tulchinsky, Dani (a); Author: Uvarov, Vladimir (b); Author: Popov, Inna (b); Author: Mandler, Daniel (a, ⁎); Author: Magdassi, Shlomo (a, ⁎); Affiliation: Institute of Chemistry, the Hebrew University of Jerusalem, Jerusalem 91904, Israel; Affiliation: The Unit for Nanoscopic Characterization, the Center for Nanoscience and Nanotechnology, the Hebrew University of Jerusalem, Jerusalem 91904, Israel; Number of Pages: 7; Language: English;}, month = {2014/1/1/January}, pages = {23 - 29}, publisher = {Elsevier B.V.}, abstract = {A method for preparing a novel bixbyite non-selective coating for solar thermal conversion is described. The coating is formed by a thermal reaction between a titania sol{\textendash}gel precursor with a copper manganese spinel to form a new material, Cu0.44Ti0.44Mn0.84Fe0.28O3, with a bixbyite structure. The effect of temperature and ratio between the two components on the formation of the bixbyite layer (deposited on Inconel by spray-coating) was studied. The absorptance of the films (AM 1.5; 335{\textendash}2500nm) with a thickness of 10{\textpm}2{\textmu}m after annealing at 2h at 650{\textdegree}C and 750{\textdegree}C was 97.4\% and 94.7\%, respectively. This synthesis represents a novel approach in which the final solar thermal coating is formed as a continuous and uniform layer which combines both the absorber and the ceramic binder. The developed material shows promising results for future applications as absorber in solar thermal energy conversion.{\textbullet}A new material combining the absorber and a ceramic matrix was formed.{\textbullet}This material was used for solar thermal application with high absorptivity.{\textbullet}The formation of the material occurred by thermal treatment of a sprayed thin film.}, isbn = {0927-0248}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S0927024813004030\&site=eds-live}, author = {Tulchinsky, Dani and Uvarov, Vladimir and Popov, Inna and Mandler, Daniel and Magdassi, Shlomo} } @article {3631, title = {P.221: Novel pomegranate oil nano-emulsions for the prevention and treatment of neurodegenerative diseases: The case of genetic CJD.}, journal = {Prion}, volume = {8}, year = {2014}, note = {96525778}, month = {2014/04//2014 Su}, pages = {131}, isbn = {19336896}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=96525778\&site=eds-live}, author = {Gabizon, Ruth and Mizrahi, Michal and Friedman-Levy, Yael and Larush, Liraz and Frid, Kati and Binyamin, Orli and Dori, Dvir and Feinstein, Nina and Ovadia, Haim and Ben-Hur, Tamir and Magdassi, Shlomo} } @article {3604, title = {Photoactive Nanocrystals by Low-Temperature Welding of Copper Sulfide Nanoparticles and Indium Sulfide Nanosheets}, number = {12}, year = {2014}, note = {Item Citation: ChemSusChem. Dec 2014, Vol. 7 Issue 12, p3290, 5 p.Accession Number: edsgcl.397740474; Publication Type: Academic Journal; Source: ChemSusChem; Language: English; Publication Date: 20141201; Rights: Copyright 2014 Gale, Cengage Learning. All rights reserved.; Imprint: Wiley Subscription Services, Inc.}, month = {2014///}, pages = {3290}, publisher = {Wiley Subscription Services, Inc.}, keywords = {electron microscopy, Indium, Jewish schools, Nanoparticles, Nanotechnology, Raman spectroscopy, Sulfides}, isbn = {1864-5631}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edsgao\&AN=edsgcl.397740474\&site=eds-live}, author = {Lim, Hui Min and Tan, Jia Yi and Batabyal, Sudip K. and Magdassi, Shlomo and Mhaisalkar, Subodh G. and Wong, Lydia H.} } @article {3611, title = {Pomegranate seed oil nanoemulsions for the prevention and treatment of neurodegenerative diseases: the case of genetic CJD}, journal = {Nanomedicine: Nanotechnology, Biology, and Medicine}, volume = {10}, year = {2014}, note = {Accession Number: S1549963414001336; Author: Mizrahi, Michal (a, 1); Author: Friedman-Levi, Yael (a, 1); Author: Larush, Liraz (b); Author: Frid, Kati (a); Author: Binyamin, Orli (a); Author: Dori, Dvir (a); Author: Fainstein, Nina (a); Author: Ovadia, Haim (a); Author: Ben-Hur, Tamir (a); Author: Magdassi, Shlomo (b); Author: Gabizon, Ruth (a, ⁎); Affiliation: Department of Neurology, The Agnes Ginges Center for Human Neurogenetics, Hadassah University Hospital, Jerusalem, Israel; Affiliation: Casali Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, Israel; Funding: This project was funded by a grant from the Israel Science Foundation (ISF) and by the Agnes Ginges Center. At present time, a commercial entity (Granalix) is being formed based on the presented results; Number of Pages: 11; Language: English;}, month = {2014/8/1/August}, pages = {1353 - 1363}, publisher = {Elsevier Inc.}, abstract = {Neurodegenerative diseases generate the accumulation of specific misfolded proteins, such as PrPSc prions or A-beta in Alzheimer{\textquoteright}s diseases, and share common pathological features, like neuronal death and oxidative damage. To test whether reduced oxidation alters disease manifestation, we treated TgMHu2ME199K mice, modeling for genetic prion disease, with Nano-PSO, a nanodroplet formulation of pomegranate seed oil (PSO). PSO comprises large concentrations of a unique polyunsaturated fatty acid, Punicic acid, among the strongest natural antioxidants. Nano-PSO significantly delayed disease presentation when administered to asymptomatic TgMHu2ME199K mice and postponed disease aggravation in already sick mice. Analysis of brain samples revealed that Nano-PSO treatment did not decrease PrPSc accumulation, but rather reduced lipid oxidation and neuronal loss, indicating a strong neuroprotective effect. We propose that Nano-PSO and alike formulations may be both beneficial and safe enough to be administered for long years to subjects at risk or to those already affected by neurodegenerative conditions.From the Clinical Editor This team of authors report that a nanoformulation of pomegranade seed oil, containing high levels of a strong antioxidant, can delay disease onset in a mouse model of genetic prion diseases, and the formulation also indicates a direct neuroprotective effect.}, isbn = {1549-9634}, author = {Mizrahi, Michal and Friedman-Levi, Yael and Larush, Liraz and Frid, Kati and Binyamin, Orli and Dori, Dvir and Fainstein, Nina and Ovadia, Haim and Ben-Hur, Tamir and Magdassi, Shlomo and Gabizon, Ruth} } @article {3615, title = {Printing holes by a dewetting solution enables formation of a transparent conductive filmPrinting holes by a dewetting solution enables formation of a transparent conductive film}, journal = {ACS Applied Materials and Interfaces}, volume = {6}, number = {21}, year = {2014}, note = {Accession Number: edselc.2-52.0-84910135943; (ACS Applied Materials and Interfaces, 12 November 2014, 6(21):18668-18672) Publication Type: Academic Journal; Rights: Copyright 2014 Elsevier B.V., All rights reserved.}, month = {2014 / 11 / 12 /}, pages = {18668-18672}, publisher = {American Chemical Society}, keywords = {conductive, Electrodes, holes, Silver, transparent}, isbn = {1944825219448244}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselc\&AN=edselc.2-52.0-84910135943\&site=eds-live}, author = {Layani, M. and Berman, R. and Magdassi, S.} } @article {3613, title = {Review: Tunable inkjet printed hybrid carbon nanotubes/nanocrystals light sensor}, journal = {Sensors \& Actuators: B. Chemical}, volume = {196}, year = {2014}, note = {Accession Number: S0925400514001385; Author: Katzir, E. (a); Author: Yochelis, S. (a); Author: Paltiel, Y. (a, ⁎); Author: Azoubel, S. (b); Author: Shimoni, A. (b); Author: Magdassi, S. (b); Affiliation: Applied Physics Department, Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; Affiliation: Institute of Chemistry, Casali Center and the Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; Number of Pages: 5; Language: English;}, month = {2014/6/1/June 20}, pages = {112 - 116}, publisher = {Elsevier B.V.}, abstract = {In recent years carbon based devices are exploited for a wide range of applications related to electronics and optoelectronics, due to their unique electrical, optical and mechanical properties. Many sensors, emitters, transistors and logic devices use carbon nanotubes as their major building block. Here we present a technology for inkjet printing of a hybrid tunable detector composed of carbon nanotubes and nanocrystals. The printing can be performed on flexible elastic transparent substrates, as well as on a rigid semiconductor or dielectric substrates. The presented detector is low cost, operates at room temperature and can be printed easily in a large format. We show that these types of sensor function with high quantum efficiency due to a gating effect induced by the light excitation.}, isbn = {0925-4005}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S0925400514001385\&site=eds-live}, author = {Katzir, E. and Yochelis, S. and Paltiel, Y. and Azoubel, S. and Shimoni, A. and Magdassi, S.} } @article {3618, title = {Simulation and prediction of the thermal sintering behavior for a silver nanoparticle ink based on experimental input.}, journal = {Journal of Materials Chemistry C}, volume = {2}, number = {31}, year = {2014}, note = {100391389}, month = {2014/08/17/}, pages = {6342}, abstract = {In order to develop a prediction model for resistivity evolution during isothermal sintering, a commercial silver nanoparticle ink was characterized for its metal content, particle size and behavior upon heating. Electrical properties, mass loss behavior, grain size development and material densification were studied for thermal sintering at 175 {\textdegree}C. The correlation between mass loss, height loss of the resulting sintered structures, grain size and electrical resistivity was investigated to gain further understanding of the silver nanoparticle sintering process. The results of thermal sintering were used to calibrate a discrete element sintering model that provides microstructural properties with which the resistivity development at 150 and 200 {\textdegree}C was successfully predicted. The model was validated by experimental data obtained at these temperatures. A variation of particle size and particle size distribution in the simulations furthermore illustrate their influence on final resistivity showing that using small particles with a broad distribution are preferable for reducing the final resistivity of the inkjet-printed pattern. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry C is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {20507526}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=100391389\&site=eds-live}, author = {W{\"u}nscher, Sebastian and Rasp, Tobias and Grouchko, Michael and Kamyshny, Alexander and Paulus, Renzo M. and Perelaer, Jolke and Kraft, Torsten and Magdassi, Shlomo and Schubert, Ulrich S.} } @article {3612, title = {Sol{\textendash}gel glasses with enhanced luminescence of laser dye Rhodamine B due to plasmonic coupling by copper nanoparticles}, journal = {Optical Materials}, volume = {36}, number = {SI: IWASOM{\textquoteright}13}, year = {2014}, note = {Accession Number: S0925346713005983; Author: Reisfeld, Renata (a, ⁎); Author: Grinberg, Marek (b); Author: Levchenko, Viktoria (a); Author: Kukli{\'n}ski, Benedykt (b); Author: Mahlik, Sebastian (b); Author: Magdassi, Shlomo (a); Author: Grouchko, Michael (a); Affiliation: Institute of Experimental Physics, University of Gda{\'n}sk, Wita Stwosza 57, Gda{\'n}sk 80950, Poland; Affiliation: The Institute of Chemistry, Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; Number of Pages: 5; Language: English;}, month = {2014/8/1/August}, pages = {1611 - 1615}, publisher = {Elsevier B.V.}, abstract = {{\textbullet}Copper nanoparticles increase the fluorescence in doped glasses.{\textbullet}Increase the emission of Rh B is result of its interaction with Cu NPs surface plasmons.{\textbullet}Optimal distances would be increase of fluorescence by orders of magnitude.We present the possibility to increase the emission of Rhodamine B (Rh B) as a result of its interaction with surface plasmons (SF) created by copper nanoparticles (Cu NPs). The optical absorption and emission of Rh B with Cu NPs incorporated into glass films formed by sol{\textendash}gel method were studied by steady state and picosecond spectroscopy. The observed increased luminescence is the result of interaction of the excited state of the dye with scattered light created by copper plasmons and possible energy transfer from the excited Cu NPs which occur at femptosecond time range. The steady state absorption, excitation, fluorescence and lifetimes excited by picosecond pulses were measured. The quantum efficiencies of the films were obtained by comparative method.}, isbn = {0925-3467}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S0925346713005983\&site=eds-live}, author = {Reisfeld, Renata and Grinberg, Marek and Levchenko, Viktoria and Kukli{\'n}ski, Benedykt and Mahlik, Sebastian and Magdassi, Shlomo and Grouchko, Michael} } @article {3622, title = {Three-dimensional printing of scintillating materialsThree-dimensional printing of scintillating materials}, journal = {Review of Scientific Instruments}, volume = {85}, number = {8}, year = {2014}, note = {Accession Number: edselc.2-52.0-84905492684; (Review of Scientific Instruments, August 2014, 85(8)) Publication Type: Academic Journal; Rights: Copyright 2014 Elsevier B.V., All rights reserved.}, month = {2014 / 01 / 01 /}, publisher = {American Institute of Physics Inc.}, isbn = {1089762300346748}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselc\&AN=edselc.2-52.0-84905492684\&site=eds-live}, author = {Mishnayot, Y. and Ron, G. and Layani, M. and Cooperstein, I. and Magdassi, S.} } @article {4637, title = {Transparent conductors composed of nanomaterials.}, journal = {NanoscaleNanoscale}, volume = {6}, number = {11}, year = {2014}, note = {CAPLUS AN 2014:814175(Journal; General Review; Online Computer File)}, month = {2014///}, pages = {5581 - 5591}, publisher = {Royal Society of Chemistry}, abstract = {This is a review on recent developments in the field of transparent conductive coatings (TCCs) for ITO replacement. The review describes the basic properties of conductive nanomaterials suitable for fabrication of such TCCs (metallic nanoparticles and nanowires, carbon nanotubes and graphene sheets), various methods of patterning the metal nanoparticles with formation of conductive transparent metallic grids, honeycomb structures and 2D arrays of interconnected rings as well as fabrication of TCCs based on graphene and carbon nanotubes. Applications of TCCs in electronic and optoelectronic devices, such as solar cells, electroluminescent and electrochromic devices, touch screens and displays, and transparent EMI shielders, are discussed. [on SciFinder(R)]}, keywords = {transparent conductor nanomaterial review}, isbn = {2040-3372}, author = {Layani, Michael and Kamyshny, Alexander and Magdassi, Shlomo.} } @article {3608, title = {Tunable inkjet printed hybrid carbon nanotubes/nanocrystals light sensor}, year = {2014}, note = {Item Citation: Sensors \& Actuators: B. Chemical. June 2014, Vol. 196, p112, 5 p.Accession Number: edsgcl.364237725; Publication Type: Academic Journal; Source: Sensors \& Actuators: B. Chemical; Language: English; Publication Date: 20140601; Rights: Copyright 2014 Gale, Cengage Learning. All rights reserved., COPYRIGHT 2014 Elsevier B.V.; Imprint: Elsevier B.V.}, month = {2014///}, pages = {112}, publisher = {Elsevier B.V.}, abstract = {In recent years carbon based devices are exploited for a wide range of applications related to electronics and optoelectronics, due to their unique electrical, optical and mechanical properties. Many sensors, emitters, transistors and logic devices use carbon nanotubes as their major building block. Here we present a technology for inkjet printing of a hybrid tunable detector composed of carbon nanotubes and nanocrystals. The printing can be performed on flexible elastic transparent substrates, as well as on a rigid semiconductor or dielectric substrates. The presented detector is low cost, operates at room temperature and can be printed easily in a large format. We show that these types of sensor function with high quantum efficiency due to a gating effect induced by the light excitation.}, keywords = {Dielectrics {\textendash} Electric properties, Digital printing system, Monochrome printer, Nanotubes {\textendash} Electric properties, Printer accessory, Printers (Computers) {\textendash} Electric properties, Sensors {\textendash} Electric properties, Transistors {\textendash} Electric properties}, isbn = {0925-4005}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edsgao\&AN=edsgcl.364237725\&site=eds-live}, author = {Katzir, E. and Yochelis, S. and Paltiel, Y. and Azoubel, S. and Shimoni, A. and Magdassi, S.} } @article {3607, title = {VO.sub.2/Si-Al gel nanocomposite thermochromic smart foils: Largely enhanced luminous transmittance and solar modulation}, year = {2014}, note = {Item Citation: Journal of Colloid And Interface Science. August 1, 2014, Vol. 427, p49, 5 p.Accession Number: edsgcl.370739906; Publication Type: Academic Journal; Source: Journal of Colloid And Interface Science; Language: English; Publication Date: 20140801; Rights: Copyright 2014 Gale, Cengage Learning. All rights reserved., COPYRIGHT 2014 Elsevier B.V.; Imprint: Elsevier B.V.}, month = {2014///}, pages = {49}, publisher = {Elsevier B.V.}, abstract = {Display Omitted}, isbn = {0021-9797}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edsgao\&AN=edsgcl.370739906\&site=eds-live}, author = {Liu, C. and Cao, X. and Kamyshny, A. and Law, J.Y. and Magdassi, S. and Long, Y.} } @article {3660, title = {Aqueous solution synthesis of (Sb, Bi)2(Te, Se)3 nanocrystals with controllable composition and morphology.}, journal = {Journal of Materials Chemistry C}, volume = {1}, number = {39}, year = {2013}, note = {100891261}, month = {2013/10/16/}, pages = {6271}, abstract = {The introduction of nanostructures has been considered as one of the promising strategies to enhance the thermoelectric performance of bulk materials. In this work, we report a low-cost and facile aqueous solution method to prepare (Sb, Bi)2(Te, Se)3 nanocrystals with controllable composition and morphology by using short ligands containing thiol, acid and amine groups. The control of the morphology of the nanostructures such as nanowires and nanosheets is studied, and both n-type and p-type nanoparticles have been prepared successfully. The results show that the thermal conductivities of these nanocrystals are effectively reduced due to phonon scattering and the thermoelectric performance is affected greatly by the morphology. TE measurements show that the electrical conductivity can be enhanced significantly by using Bi2Te3 nanosheets, and as a result, a maximum thermoelectric figure-of-merit (ZT) of 0.86 is obtained for Bi2Te3 nanosheets at 225 {\textdegree}C. [ABSTRACT FROM AUTHOR]Copyright of Journal of Materials Chemistry C is the property of Royal Society of Chemistry and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder{\textquoteright}s express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)}, isbn = {20507526}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edb\&AN=100891261\&site=eds-live}, author = {Lu, Ziyang and Tan, Li Ping and Zhao, Xiaoxu and Layani, Michael and Sun, Ting and Fan, Shufen and Yan, Qingyu and Magdassi, Shlomo and Hng, Huey Hoon} } @article {3657, title = {A dispersability study on poly(thiophen-3-yl-acetic acid) and PEDOT multi-walled carbon nanotube composites using an analytical centrifuge}, journal = {Journal of Colloid And Interface Science}, volume = {390}, year = {2013}, note = {Accession Number: S0021979712010053; Author: Harel, Yifat (a); Author: Azoubel, Suzanna (b); Author: Magdassi, Shlomo (b); Author: Lellouche, Jean-Paul (a, ⁎); Affiliation: Department of Chemistry, Nanomaterials Research Center, Institute of Nanotechnology \& Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel; Affiliation: Casali Institute of Applied Chemistry, Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel; Number of Pages: 8; Language: English;}, month = {2013/1/15/15 Jan}, pages = {62 - 69}, publisher = {Elsevier Inc.}, abstract = {The present study investigated the influence of a covalently grown polythiophene (polyTh)-based adlayer on the N-methyl-2-pyrrolidone (NMP) dispersion of chemically modified multi-walled carbon nanotubes (MWCNTs). Poly(thiophen-3-yl-acetic acid) (PTAA), poly(ethylenedioxythiophene) (PEDOT), and PTAA/PEDOT co-polymer have been oxidatively grown from the surface of functional MWCNTs afforded corresponding polyThA-, polyThB-, and polyThA/B-MWCNTs, respectively. To study and quantify the MWCNT particle sedimentation behavior of corresponding dispersion systems, an analytical centrifuge system was used. Comparison of dispersion quality of such polyTh-MWCNT composites with both commercial MWCNTs (COM-MWCNTs) and oxidized MWCNTs (polyCOOH-MWCNTs) was established. Analysis of sedimentation results combined with TGA, Elemental Analysis (EA), and Kaiser Test data showed that the COOH groups present on the surface of MWCNTs strongly promote the dispersability much beyond current sedimentation rate observed for COM-MWCNTs, {\textendash} sedimentation rates were higher than 80\% and below 2\% for oxidized polyCOOH-MWCNTs. However, regarding MWCNTs coated with polyTh polymers in a core (MWCNT){\textendash}shell (polyTh) structure, outer functional groups are not the only influential factor for promoting high dispersion qualities. For these dual phase composite systems, the weight and thickness of polyTh-shell on the composite must be considered.}, isbn = {0021-9797}, url = {http://search.ebscohost.com/login.aspx?direct=true\&db=edselp\&AN=S0021979712010053\&site=eds-live}, author = {Harel, Yifat and Azoubel, Suzanna and Magdassi, Shlomo and Lellouche, Jean-Paul} } @article {3832, title = {Polymer-surfactant interactions: Binding mechanism of sodium dodecyl sulfate to poly(diallyldimethylammonium chloride).}, journal = {J. Colloid Interface Sci.Journal of Colloid and Interface Science}, volume = {320}, number = {1}, year = {2008}, note = {CAPLUS AN 2008:232429(Journal)}, month = {2008///}, pages = {74 - 81}, publisher = {Elsevier}, abstract = {The binding mechanism of poly(diallyldimethylammonium chloride), PDAC, and sodium dodecyl sulfate, SDS, has been comprehensively studied by combining binding isotherms data with microcalorimetry, zeta potential, and cond. measurements, as well as ab initio quantum mech. calcns. The obtained results demonstrate that surfactant-polymer interaction is governed by both electrostatic and hydrophobic interactions, and is cooperative in the presence of salt. This binding results in the formation of nanoparticles, which are pos. or neg. charged depending on the molar ratio of surfactant to PDAC monomeric units. From microcalorimetry data it was concluded that the exothermic character of the interaction diminishes with the increase in the surfactant/polymer ratio as well as with an increase in electrolyte concn. [on SciFinder(R)]}, keywords = {polydiallyldimethylammonium chloride sodium dodecyl sulfate interaction}, isbn = {0021-9797}, author = {Nizri, Gilat and Lagerge, Serge and Kamyshny, Alexander and Major, Dan T. and Magdassi, Shlomo.} } @article {3833, title = {Slow release of pheromones to the atmosphere from gelatin-alginate beads.}, journal = {J. Agric. Food Chem.Journal of Agricultural and Food Chemistry}, volume = {56}, number = {17}, year = {2008}, note = {CAPLUS AN 2008:966472(Journal)}, month = {2008///}, pages = {8045 - 8049}, publisher = {American Chemical Society}, abstract = {Alginate-gelatin beads with dispersed droplets of a model pheromone, dodecyl acetate, were prepd. as a vehicle for slow release of pheromones into the atm. over a prolonged period of time. The beads are prepd. in two steps, the first being prepn. of an oil-in-water emulsion composed of dodecyl acetate as the oil phase and gelatin as the emulsifier, which provides steric stabilization. After mixing with alginate soln., this emulsion is embedded within beads by simple electrostatic crosslinking. Bead porosity at micrometric and nanometric scales plays an important role in controlling the release of dodecyl acetate. [on SciFinder(R)]}, keywords = {slow release pheromone gelatin alginate bead}, isbn = {0021-8561}, author = {Yosha, Ido and Shani, Arnon and Magdassi, Shlomo.} } @article {3836, title = {Emulsions, Foams, and Suspensions, Fundamentals and Applications by Laurier L. Schramm.}, journal = {Adv. Mater. (Weinheim, Ger.)Advanced Materials (Weinheim, Germany)}, volume = {19}, number = {7}, year = {2007}, note = {CAPLUS AN 2007:450647(Journal; Book Review)}, month = {2007///}, pages = {1008}, publisher = {Wiley-VCH Verlag GmbH \& Co. KGaA}, isbn = {0935-9648}, author = {Magdassi, Shlomo.} } @article {3834, title = {A new method for preparation of poly-lauryl acrylate nanoparticles from nanoemulsions obtained by the phase inversion temperature process.}, journal = {Polym. Adv. Technol.Polymers for Advanced Technologies}, volume = {18}, number = {9}, year = {2007}, note = {CAPLUS AN 2007:1094633(Journal)}, month = {2007///}, pages = {705 - 711}, publisher = {John Wiley \& Sons Ltd.}, abstract = {We describe a new method for the prepn. of org. nanoparticles from nanoemulsions which were prepd. by the phase inversion temp. (PIT) method. This is a low-energy technique which does not require any special equipment such as high pressure homogenizers. In this work, the method is demonstrated for prepn. of nanoparticles of poly-lauryl acrylate contg., in some cases, a crosslinker (trimethylolpropane triacrylate-TMPTA) and pyrene as microviscosity and micropolarity probes, resp. The nanoemulsions were prepd. by using a poly(oxyethylene) nonionic surfactant, Brij 96V (POE (10) oleyl alc.), and combinations of Brij 96V and Brij 92V (POE (2) oleyl alc.), with acrylate monomers which form the oil phase in the oil-in-water (O/W) emulsions. The nanodroplets were polymd., yielding nanoparticles having an av. diam. between 50 and 120 nm with a narrow size distribution, using a water-sol. thermal initiator (ammonium persulfate) and activated by ferrous ions, Fe+2. The emission colors of the pyrene-embedded nanoemulsions changed from blue to violet after polymn., due to the absence of excimers. This method may be applied for the prepn. of a variety of polymeric nanoparticles, in which functional mols. are embedded within the particles. [on SciFinder(R)]}, keywords = {lauryl acrylate copolymer nanoparticle prepn nanoemulsion polymn, polylauryl acrylate nanoparticle prepn nanoemulsion polymn}, isbn = {1042-7147}, author = {Spernath, Liat and Magdassi, Shlomo.} } @article {3839, title = {Preparation of ethyl cellulose nanoparticles from nano-emulsion obtained by inversion at constant temperature.}, journal = {Micro Nano Lett.Micro \& Nano Letters}, volume = {2}, number = {4}, year = {2007}, note = {CAPLUS AN 2008:1135278(Journal; Online Computer File)}, month = {2007///}, pages = {90 - 95}, publisher = {Institution of Engineering and Technology}, abstract = {A new method for the prepn. of nanoparticles from nano-emulsions using a low-energy emulsification method based on phase inversion at const. temp. (catastrophic inversion) is described. This method does not require any special equipment such as high-pressure homogenizers. The method is demonstrated for the prepn. of Et cellulose nanoparticles contg. pyrene (a microviscosity and micropolarity probe) as a hydrophobic model mol. The nano-emulsions were prepd. using a combination of non-ionic surfactants: Polyglycerol fatty acid ester (decaglycerol mono laurate) and sorbitan ester (Span 20), volatile org. solvent (toluene) and Et cellulose. Toluene was evapd. from the nano-emulsions, resulting in Et cellulose nanoparticles 50-120 nm in size. The emission colors of the pyrene-embedded nano-emulsions changed from blue to violet after the evapn. of the toluene because of the absence of excimers. This method may be applied for the prepn. of a variety of polymeric nanoparticles in which functional mols. are embedded within the particles. [on SciFinder(R)]}, keywords = {ethyl cellulose nanoparticle prepn pyrene probe}, isbn = {1750-0443}, url = {http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf\&id=MNLIBX000002000004000090000001\&idtype=cvips\&prog=normal}, author = {Spernarth, L. and Magdassi, S.} } @article {3841, title = {Amplification of complex gene libraries by emulsion PCR.}, journal = {Nat. MethodsNature Methods}, volume = {3}, number = {7}, year = {2006}, note = {CAPLUS AN 2006:600444(Journal)}, month = {2006///}, pages = {545 - 550}, publisher = {Nature Publishing Group}, abstract = {The efficient amplification of genomic libraries, cDNA libraries and other complex mixts. of genes by PCR is impeded by two phenomena: firstly, short fragments tend to be amplified in preference to larger ones; and, secondly, artifactual fragments are generated by recombination between homologous regions of DNA. Recombination in this case occurs when a primer is partially extended on one template during one cycle of PCR and further extended on another template during a later cycle. Thus, chimeric mols. are generated, the short ones of which are then preferentially amplified. A variety of PCR protocols have been proposed to minimize these problems, most of which rely on high template concns. and low nos. of PCR cycles. Clearly, however, such an approach is not viable if little template DNA is available. Here we describe a protocol for amplifying complex DNA mixts., based on the compartmentalization of genes in a water-in-oil (w/o) emulsion. Template fragments are segregated in the minute aq. droplets of the emulsion and amplified by PCR in isolation. This approach alleviates the problems described above while enabling the use of small amts. of template DNA and high nos. of PCR cycles. Box 1 described an alternative method for generating very stable emulsions for emulsion PCR using the surfactant ABIL EM 90. [on SciFinder(R)]}, keywords = {PCR emulsion DNA library surfactant}, isbn = {1548-7091}, author = {Williams, Richard and Peisajovich, Sergio G. and Miller, Oliver J. and Magdassi, Shlomo and Tawfik, Dan S. and Griffiths, Andrew D.} } @article {3843, title = {Directed evolution by in vitro compartmentalization.}, journal = {Nat. MethodsNature Methods}, volume = {3}, number = {7}, year = {2006}, note = {CAPLUS AN 2006:600445(Journal)}, month = {2006///}, pages = {561 - 570}, publisher = {Nature Publishing Group}, abstract = {The goal of in vitro compartmentalization (IVC) is to divide a large reaction between many microscopic compartments. This technique was first developed to generate "artificial cells" for the directed evolution of proteins. Typically, an aq. soln. of genes and an in vitro transcription-translation system is stirred (or homogenized) into an oil-surfactant mixt. to create a water-in-oil (w/o) emulsion with -1010 aq. droplets per mol of emulsion. The majority of droplets contain no more that a single gene along with all of the mol. machinery needed to express that gene. The expressed proteins and the products of their catalytic activities cannot leave the droplets, and so genotype is coupled to phenotype in vitro, making it possible to select very large libraries of genes (108-1011 genes). We describe the advantages and applications of IVC. A protocol for performing a directed evolution expt. by IVC makes use of one or more w/o emulsions. This procedure involves the generation of a gene library, the performance of a selection, and the subsequent recovery of the selected genes by PCR. We also describe two procedures for converting w/o emulsions to water-in-oil-in-water (w/o/w) emulsions for high-throughput screening using a fluorescence-activated cell sorter (FACS). Finally, we describe two methods for delivering substrates, regulators and other compds. to the preformed aq. droplets of w/o emulsion. [on SciFinder(R)]}, keywords = {directed evolution in vitro compartmentalization gene library, water in oil emulsion in vitro compartmentalization}, isbn = {1548-7091}, author = {Miller, Oliver J. and Bernath, Kalia and Agresti, Jeremy J. and Amitai, Gil and Kelly, Bernard T. and Mastrobattista, Enrico and Taly, Valerie and Magdassi, Shlomo and Tawfik, Dan S. and Griffiths, Andrew D.} } @article {3845, title = {Dispersion of magnetic nanoparticles in suspension.}, journal = {Micro Nano Lett.Micro \& Nano Letters}, volume = {1}, number = {1}, year = {2006}, note = {CAPLUS AN 2008:1135482(Journal; Online Computer File)}, month = {2006///}, pages = {39 - 42}, publisher = {Institution of Engineering and Technology}, abstract = {Pure magnetite nanoparticles (Fe3O4) have been synthesized in water by copptn. using two different approaches (from ferrous sulfate and a mixt. of ferrous and ferric chlorides). All materials aggregated in aq. suspension, but their subsequent dispersion on treatment with a variety of agents was obsd. to be different. Magnetite produced using ferrous sulfate could not be disaggregated, whereas magnetite produced from a mixt. of ferrous and ferric chlorides could be disaggregated to a quasi-monodispersed form. The dispersing agents were tetra-Me ammonium hydroxide, Disperbyk 190 and polyacrylic acid. The finding has potentially important implications for the surface activation of superparamagnetic magnetite nanoparticles and their ability to be used in bio/life science applications. [on SciFinder(R)]}, keywords = {magnetite superparamagnetic magnetic nanoparticle dispersion suspension copptn}, isbn = {1750-0443}, url = {http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype=pdf\&id=MNLIBX000001000001000039000001\&idtype=cvips\&prog=normal}, author = {Sen, T. and Magdassi, S. and Nizri, G. and Bruce, I. J.} } @article {3847, title = {Making connections. Aqueous dispersions of silver nanoparticles form conductive inkjet inks.}, journal = {Eur. Coat. J.European Coatings Journal}, number = {11}, year = {2006}, note = {CAPLUS AN 2006:1285232(Journal)}, month = {2006///}, pages = {54, 56, 58-59}, publisher = {Vincentz Network}, abstract = {Nanoparticles of metals having high elec. cond. offer new scope for direct digital printing of conductive patterns. Stable aq. silver nanoparticle dispersions were synthesized by chem. redn. These were suitable for inkjet printing, with the dried inks sintering at temps. as low as 160{\textdegree}. However, the resistance remained much higher than that of metallic silver. [on SciFinder(R)]}, keywords = {silver nanoparticle aq dispersion conductive inkjet ink}, isbn = {0930-3847}, author = {Magdassi, Shlomo and Kamyshny, Alexander and Grouchko, Michael.} } @article {3851, title = {Directed Evolution of Protein Inhibitors of DNA-nucleases by in Vitro Compartmentalization (IVC) and Nano-droplet Delivery.}, journal = {J. Mol. Biol.Journal of Molecular Biology}, volume = {345}, number = {5}, year = {2005}, note = {CAPLUS AN 2005:26180(Journal)}, month = {2005///}, pages = {1015 - 1026}, publisher = {Elsevier B.V.}, abstract = {In vitro compartmentalization (IVC) uses water-in-oil emulsions to create artificial cell-like compartments in which genes can be individually transcribed and translated. Here, we present a new application of IVC for the selection of DNA-nuclease inhibitors. We developed a nano-droplets delivery system that allows the transport of various solutes, including metal ions, into the emulsion droplets. This transport mechanism was used to regulate the activity of colicin nucleases that were co-compartmentalized with the genes, so that the nucleases were activated by nickel or cobalt ions only after the potential inhibitor genes have been translated. Thus, genes encoding nuclease inhibitors survived the digestion and were subsequently amplified and isolated. Selection is therefore directly for inhibition, and not for binding of the nuclease. The stringency of selection can be easily modulated to give high enrichments (100-500-fold) and recoveries. We demonstrated its utility by selecting libraries of the gene encoding the cognate inhibitor of colicin E9 (immunity protein 9, or Im9) for inhibition of another colicin (ColE7). The in vitro evolved inhibitors show significant inhibition of ColE7 both in vitro and in vivo. These Im9 variants carry mutations into residues that det. the selectivity of the natural counterpart (Im7) while completely retaining the residues that are conserved throughout the family of immunity protein inhibitors. The in vitro evolution process confirms earlier hypotheses regarding the "dual recognition" binding mechanism and the way in which new colicin-immunity pairs diverged from existing ones. [on SciFinder(R)]}, keywords = {evolution inhibitor cell free colicin E9 E7 DNA nuclease}, isbn = {0022-2836}, author = {Bernath, Kalia and Magdassi, Shlomo and Tawfik, Dan S.} } @article {3859, title = {Solubilization of hydrophobic molecules in nanoparticles formed by polymer-surfactant interactions.}, journal = {J. Colloid Interface Sci.Journal of Colloid and Interface Science}, volume = {291}, number = {1}, year = {2005}, note = {CAPLUS AN 2005:1047266(Journal)}, month = {2005///}, pages = {169 - 174}, publisher = {Elsevier}, abstract = {The interaction between the anionic surfactant, Na dodecyl sulfate, and the polyelectrolyte, poly(diallyldimethylammonium chloride), may give nanoparticles dispersed in H2O. The morphol. of the resulting nanoparticles and their ability to solubilize hydrophobic mols. were evaluated. As shown by SEM and AFM imaging, the particles are spherical, having a diam. of \~20 nm. The solubilization within the nanoparticles was tested with pyrene, a fluorescence probe, and Nile Red, a solvatochromic probe. For Nile Red the solubilization within the nanoparticles is at lower polarity than for SDS micelles, and from pyrene solubilization apparently the hydrophobicity of the nanoparticles depends on the ratio between the SDS mols. and the charge unit of the polymer. [on SciFinder(R)]}, keywords = {hydrophobe solubilization polymer surfactant nanoparticle}, isbn = {0021-9797}, author = {Nizri, Gilat and Magdassi, Shlomo.} }