Investigation of electrical hydrogen detection properties of Pt/WO 3 thin films prepared by sol-gel method

Yuki Yamaguchi, Tohru Kineri, Masakatsu Fujimoto, Hideo Mae, Atsuo Yasumori, Keishi Nishio

研究成果: Conference contribution査読

4 被引用数 (Scopus)

抄録

Platinum (Pt)nanoparticle-dispersed tungsten trioxide (WO3) thin film is a gasochromic material that changes color from transparent to blue in an H2 gas atmosphere. The electrical conductivity of Pt-nanoparticle-dispersed WO3 is dependent on inserted protons and electrons, though the material is insulator in air, because these electrons and protons work as electrical carriers in WO3. In this study, Pt-nanoparticle-dispersed WO3 thin films were prepared using the sol-gel process, and the optical and electrical properties were evaluated in an atmosphere with or without H2 gas. Pt/WO3 thin films prepared at 400°C showed the largest change in electrical conductivity when exposed to 1% H2 gas compared with thin films prepared at other temperatures. The electrical conductivity of the film was dependent on an H 2 gas concentration in the range from 100 ppm to 1%. Pt/WO 3 thin films prepared by the sol-gel process are expected to be used for H2 gas sensor devices due to the linear relationship between the electrical conductivity and H2 gas concentration.

本文言語English
ホスト出版物のタイトルElectroceramics in Japan XIV
出版社Trans Tech Publications Ltd
ページ271-274
ページ数4
ISBN(印刷版)9783037851821
DOI
出版ステータスPublished - 2011

出版物シリーズ

名前Key Engineering Materials
485
ISSN(印刷版)1013-9826
ISSN(電子版)1662-9795

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