Asymmetrically modulating the insulator-metal transition of thermochromic VO2 films upon heating and cooling by mild surface-etching
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- 作者：Litao Kanga ; kangltxy@gmail.com" class="auth_mail ; Lingli Xiea ; Zhang Chenb ; Yanfeng Gaoc ; yfgao@mail.sic.ac.cn" class="auth_mail ; Xuguang Liud ; Yongzhen Yanga ; d ; Wei Lianga
- 关键词：Vanadium dioxide ; Insulator&ndash ; metal transition ; Thermochromic property ; Hysteresis loop
- 刊名：Applied Surface Science
- 出版年：30 August 2014
- 年：2014
- 卷：311
- 期：Complete
- 页码：676-683
- 全文大小：2547 K
文摘
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A mild acid etching treatment on VO2 films was performance to adjust the surface state of the VO2 particles, while leaving the phase composition, crystallinity, grain size, and stoichiometry unchanged.
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Acid etching affects only the IMT (insulator–metal transition) characteristics of films, but keeps MIT properties almost constant.
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These results directly correlate the nucleation of metal-phase VO2 with surface-localized defects, suggesting a potential particle surface engineering to independently regulate MIT and IMT.