Optical Imaging Hydrogen Sensing Based on Vanadium Dioxide

• Main Authors: Chen, Yang, 陳暘
• Other Authors: Chen, Kuo-Ping
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/cfxr5m

碩士 === 國立交通大學 === 照明與能源光電研究所 === 108 === Vanadium dioxide (VO2) is known as a temperature-dependent phase-change material. The significant insulator-to-metal transition (MIT) phenomenon can be observed when the temperature of VO2 changing over 68 °C. In this study, the hydrogen concentration dependent tunable hydrogenated VO2 (HVO2) thin film is demonstrated at the temperature around 130 °C with platinum nano islands on the top. As the metal state of VO2 reacted with hydrogen, due to the hydrogen-induced lattice expansion of VO2, the emissivity in infrared and the resistance would be changed dramatically. In the H2 concentration of 4 % sensing measurement, the results revealed that the sensors exhibit perfect reversibility and temperature monitored by the thermal imaging infrared camera decreased from 110 °C to 99 °C. The hydrogen control of thermal radiation would provide novel methods for gas sensing and adaptive coloration.