Sensors 2010, 10(3), 2088-2106; doi:10.3390/s100302088
Metal Oxide Gas Sensors: Sensitivity and Influencing Factors
Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China
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Received: 17 February 2010 / Revised: 10 March 2010 / Accepted: 14 March 2010 / Published: 15 March 2010
(This article belongs to the Special Issue Metal-Oxide Based Nanosensors)
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. View Full-TextKeywords:
metal oxide; gas sensors; sensitivity; surface reaction
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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MDPI and ACS Style
Wang, C.; Yin, L.; Zhang, L.; Xiang, D.; Gao, R. Metal Oxide Gas Sensors: Sensitivity and Influencing Factors. Sensors 2010, 10, 2088-2106.