Abstract:

Vanadiumdioxide is the most widely researched thermochromic materialwith a phase transition temperature (τc) of around68 °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’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.)

Notes:

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: †Schoolof Materials Science and Engineering and ‡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 – Magnetic properties; Subject Term: FREEZING; Subject Term: TRANSMITTANCE (Physics); Subject Term: POROUS materials; Number of Pages: 6p; Document Type: Article