Journal
ACS NANO
Volume 11, Issue 7, Pages 7542-7551Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.7b02232
Keywords
vanadium dioxide; localized surface plasmon resonance; patterned nanostructure; near-infrared modulation; thermochromics; smart devices; nanosphere lithography
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Funding
- Singapore Minster of Education (MOE) Academic Research Fund Tier one [RG124/16]
- Singapore Research Foundation under the Campus for Research and Technological Enterprise (CREATE) program
- Singapore Research Foundation [NRF2015NRF-POC002-019]
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A universal approach to develop various two-dimensional ordered nanostructures, namely nanoparticle, nanonet and nano dome arrays with controllable periodicity, ranging from 100 nm to 1 mu m, has been developed in centimeter-scale by nanosphere lithography technique. Hexagonally patterned vanadium dioxide (VO2) nanoparticle array with average diameter down to sub-100 nm as well as 160 nm of periodicity is fabricated, exhibiting distinct size-, media-, and temperature-dependent localized surface plasmon resonance switching behaviors, which fits well with the predication of simulations. We specifically explore their decent thermochromic performance in an energy saving smart window and develop a proof-of-concept demo which proves the effectiveness of patterned VO2 film to serve as a smart thermal radiation control. This versatile and facile approach to fabricate various ordered nanostructures integrated with attractive phase change characteristics of VO2 may inspire the study of temperature-dependent physical responses and the development of smart devices in extensive areas.
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