Selectivity enhancement of SnO2 gas sensors:: simultaneous monitoring of resistances and temperatures

被引：66

作者：

Heilig, A ^{[1
]}

Barsan, N ^{[1
]}

Weimar, U ^{[1
]}

Göpel, W ^{[1
]}

机构：

[1] Univ Tubingen, Inst Chem Phys, D-72076 Tubingen, Germany

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1999年 / 58卷 / 1-3期

关键词：

tin dioxide; gas sensor; resistance;

D O I：

10.1016/S0925-4005(99)00091-X

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We present results obtained with microstructured tin dioxide-based gas sensors. Thick films with controlled nanocrystallite sizes were deposited on micromachined substrates. Discrimination between CO, CH4, and C2H5OH, and between CO, CH4 and H-2 in changing humidity conditions was achieved by simultaneously measuring temperature and resistance changes upon gas exposure. These results make it possible to fulfil the American and European safety standards for CO and CH4 detection with tin dioxide based gas sensors. The physico-chemical origin of temperature and resistance changes are discussed. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：302 / 309

页数：8

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