Tungsten trioxide is an n-type semiconductor, which has been extensively used for the development of metal oxide semiconductor gas sensors. The hydrogen gas sensing performance of platinum (Pt) catalyst activated WO3 thin films were investigated here. All of the Pt/WO3 films membranes are sensitive to hydrogen gas and the sample by sol-gel and DC reactive magnetron sputtering methods. X-ray diffraction results indicate that the tungsten trioxide is cubic crystal, and the AFM analysis shows molecular structures of the samples are tetrahedron. It means the four consecutive quadrilateral forms we observed in the 9nmx9nm molecular structure are scattergram of tungsten-ions and oxide-ions on 106 sides in WO2.9 structure cell, and the lost one oxide-ion resulted in the transition of WO3 to WO2.9. With anneal temperature rising, the membranous poriness decreasing. The higher crystal degree is, the lower gasochromic efficiency is. The change of combining environment and content of O−2 ions in colorized / decolorized state WOx films was observed in XPS analysis of Pt/WO3 film, the peak shape had changed greatly. As a result, the explanation to this phenomenon is available here according to XPS chemical shift of electric potential model theory.
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2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems
June 3–5, 2008
Clear Water Bay, Kowloon, Hong Kong
Conference Sponsors:
- Nanotechnology Institute
ISBN:
0-7918-4294-0
PROCEEDINGS PAPER
Preparation and Characterization of Pt/WO3 Nano-Film and Its Hydrogen-Sensing Properties
Changjun Hou,
Changjun Hou
Chongqing University, Chongqing, China
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Jiale Dong,
Jiale Dong
Chongqing University, Chongqing, China
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Danqun Huo,
Danqun Huo
Chongqing University, Chongqing, China
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Yike Tang,
Yike Tang
Chongqing University, Chongqing, China
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Jun Yang
Jun Yang
Chongqing University, Chongqing, China
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Changjun Hou
Chongqing University, Chongqing, China
Jiale Dong
Chongqing University, Chongqing, China
Yan Xu
Chongqing University, Chongqing, China
Danqun Huo
Chongqing University, Chongqing, China
Yike Tang
Chongqing University, Chongqing, China
Jun Yang
Chongqing University, Chongqing, China
Paper No:
MicroNano2008-70010, pp. 231-236; 6 pages
Published Online:
June 12, 2009
Citation
Hou, C, Dong, J, Xu, Y, Huo, D, Tang, Y, & Yang, J. "Preparation and Characterization of Pt/WO3 Nano-Film and Its Hydrogen-Sensing Properties." Proceedings of the 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. 2008 Second International Conference on Integration and Commercialization of Micro and Nanosystems. Clear Water Bay, Kowloon, Hong Kong. June 3–5, 2008. pp. 231-236. ASME. https://doi.org/10.1115/MicroNano2008-70010
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