Electrode effects on gas sensing properties of nanocrystalline zinc oxide

被引：193

作者：

Lin, HM ^{[1
]}

Tzeng, SJ ^{[1
]}

Hsiau, PJ ^{[1
]}

Tsai, WL ^{[1
]}

机构：

[1] Tatung Inst Technol, Dept Mat Engn, Taipei 104, Taiwan

来源：

NANOSTRUCTURED MATERIALS | 1998年 / 10卷 / 03期

关键词：

D O I：

10.1016/S0965-9773(98)00087-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Electrode effects on gas sensing properties have been examined by nanocrystalline zinc oxide sensor in this study. Nanocrystalline Zn is grown by the gas condensation method in a 5 mbar helium atmosphere on the surface of gold or silver electrodes and then undergoes step sintering to form nanocrystalline ZnO. The response of nanocrystalline ZnO in CO gas shows the decreasing of resistance that indicates a n-type metal oxide semiconductor behavior and in NO2 gas shows a p-type metal oxide semiconductor effect that the resistance is increased with increasing NO2 concentration. The response time of nanocrystalline ZnO sensor with Ag electrodes is fast in detecting NO2 gas, but the sensitivity can not be recovered to the background after turning off the NO2 gas. This result indicates that Ag electrodes are poisoned by NO2 gas. The linear dynamic detecting range, response time, sensitivity and reliability of nanocrystalline ZnO sensor with Au electrodes is comparably good with that of nanocrystalline ZnO sensor with Ag electrodes. (C) 1998 Acta Metallurgica Inc.

引用

页码：465 / 477

页数：13

共 18 条

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