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Sensors (Basel). 2010;10(3):2088-106. doi: 10.3390/s100302088. Epub 2010 Mar 15.

Metal oxide gas sensors: sensitivity and influencing factors.

Author information

1
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China. xiaowang412@163.com

Abstract

Conductometric semiconducting metal oxide gas sensors have been widely used and investigated in the detection of gases. Investigations have indicated that the gas sensing process is strongly related to surface reactions, so one of the important parameters of gas sensors, the sensitivity of the metal oxide based materials, will change with the factors influencing the surface reactions, such as chemical components, surface-modification and microstructures of sensing layers, temperature and humidity. In this brief review, attention will be focused on changes of sensitivity of conductometric semiconducting metal oxide gas sensors due to the five factors mentioned above.

KEYWORDS:

gas sensors; metal oxide; sensitivity; surface reaction

PMID:
22294916
PMCID:
PMC3264469
DOI:
10.3390/s100302088
[Indexed for MEDLINE]
Free PMC Article

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