抄録
The deposition of tungsten oxide thin films on the polymer sheets was performed by reactive r.f. sputtering method. It was found that the tungsten oxide thin film changes the color from transparency to deep blue within few minutes to expose 0.1 % hydrogen, such as to be recognized the change by viewing with the naked eye. The tungsten oxide thin films is useful as convenient sheet-type hydrogen sensors for the utilization of hydrogen in fuel cell as a clean energy source.
