Gasochromic properties of nanostructured tungsten oxide films prepared by sputtering deposition

Takano, Katsuyoshi; Inoue, Aichi; Yamamoto, Shunya; Sugimoto, Masaki; Yoshikawa, Masahito; Nagata, Shinji*

Japanese Journal of Applied Physics, Part 1, 46(9B), p.6315 - 6318, 2007/09

https://doi.org/10.1143/JJAP.46.6315

The amorphous, polycrystalline, and oriented films of the tungsten oxide were fabricated by sputtering deposition. It is found that each film has different roughness in the surface. The films with rough surface show fast coloration in 1% hydrogen. There is possibility that the gasochromic properties are improved effectively by the control of the surface morphology, and the films with large grains on the surface have better gasochromic coloration.