Preparation of grain size-controlled tin oxide sols by hydrothermal treatment for thin film sensor application

Dang Duc Vuong, Go Sakai, Kengo Shimanoe, Noboru Yamazoe

研究成果: ジャーナルへの寄稿学術誌査読

83 被引用数 (Scopus)

抄録

Colloidal dispersions of crystalline SnO2 (sols) with a mean grain (crystallite) size controlled between 6 and 16nm were prepared successfully from stannic acid gel by hydrothermal treatments under the condition of pH 10.5 and 200°C or pH 12.2 and 250°C. The growth of crystallites saturated in a few hours of hydrothermal treatment and the saturation values tended to increase with increasing SnO2 gel content, pH and temperature. The SnO2 grains remained monodispersed unless time of hydrothermal treatment was excessive. Thin films of SnO 2 prepared on an alumina substrate from the sols by a spin-coating method responded sharply to H2 gas. The magnitude of sensor response as well as its dependence on operating temperature were different significantly depending on the grain sizes of the starting sols. Among the sols with a mean grain size of 6, 8.5, and 10nm, the last two gave large response to H 2, which reached a maximum at 400 or 350°C, respectively.

本文言語英語
ページ(範囲)386-391
ページ数6
ジャーナルSensors and Actuators, B: Chemical
103
1-2
DOI
出版ステータス出版済み - 9月 29 2004

!!!All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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