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Proceedings Paper

Synthesis, surface modification and ethanol sensing properties of Sb-doped SnO2
Author(s): Jiarui Huang; Kun Yu; Anna A. Zhukova; Marina N. Rumyantseva; Alexandre M. Gaskov; Junhai Wang; Cuiping Gu; Jinhuai Liu
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Paper Abstract

Sb-doped SnO2 whiskers were prepared by thermal evaporation of mixture of SnO and Sb2O3 powders. And then the surface of the whisker was modified with the Au nanoparticles (Au NPs) by in situ reduction method. FE-SEM observations reveal that the synthesized products consist of a large number of whiskers. The Au NPs were homogeneously distributed on the surface of the whisker. The ethanol sensitive characteristics of single SnO2 whiskerbased sensors have been investigated. These sensors show good sensitivity, rapid response and recovery. The response and recovery time of the sensor is about 38-45 s and 125-150 s, respectively. It is found that the working temperature of the sensor decreases after the surface of Sb-doped whiskers modified with Au NPs. Compared to the unmodified Sbdoped SnO2 whisker, Au NPs modified Sb-doped SnO2 whisker exhibits greatly improvement of sensitivity which could be explained by the catalytic action of Au NPs. These results indicate that the Au NPs modifying the surface of SnO2 whiskers is important for improving its sensitivity and lowering the working temperature. This is the first step towards fundamental understanding of single-crystalline tin oxide whiskers for sensor applications, which could lead to integration in real devices.

Paper Details

Date Published: 20 October 2009
PDF: 9 pages
Proc. SPIE 7493, Second International Conference on Smart Materials and Nanotechnology in Engineering, 749376 (20 October 2009); doi: 10.1117/12.843509
Show Author Affiliations
Jiarui Huang, Anhui Normal Univ. (China)
Institute of Intelligent Machines (China)
Kun Yu, Anhui Normal Univ. (China)
Institute of Intelligent Machines (China)
Anna A. Zhukova, Moscow State Univ. (Russian Federation)
Marina N. Rumyantseva, Moscow State Univ. (Russian Federation)
Alexandre M. Gaskov, Moscow State Univ. (Russian Federation)
Junhai Wang, Anhui Normal Univ. (China)
Cuiping Gu, Anhui Normal Univ. (China)
Jinhuai Liu, Institute of Intelligent Machines (China)

Published in SPIE Proceedings Vol. 7493:
Second International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Anand K. Asundi; Wolfgang Ecke, Editor(s)

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