Formation of VO2 micrometer-scale flaky films and development of thermo-operated surface heat-transfer control devices

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656424
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: KAKIUCHIDA Hiroshi 独立行政法人産業技術総合研究所, サステナブルマテリアル研究部門, 主任研究員 (40343660)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 酸化バナジウム / メゾフレーク / 三次元ネットワーク / 液相成膜法 / 自己組織化 / サーモクロミック / 光散乱 / 熱伝達特性

Outline of Final Research Achievements

Vanadium oxide films with meso-scale (submicron- to micron-scale) flaky structures were formed using liquid phase deposition method, which is a sort of self-assembling process. Then, the optical transmittance property was discovered having a peculiar thermo-response. This is unexplainable only with an idea of conventional thermochromic behavior which has been observed in closely-packed vanadium dioxide. According to optical analysis of this thermo-response, the refractive-index change due to thermochromism may be a primary origin of this phenomenon. That is, the change in optical scattering property, which is strongly connected to refractive index, is considered to contribute this thermo-response. Furthermore, our study focused on the techniques for large-area deposition and for examination of heat transfer property.

Free Research Field

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