Journal
SENSORS
Volume 10, Issue 3, Pages 2088-2106Publisher
MDPI
DOI: 10.3390/s100302088
Keywords
metal oxide; gas sensors; sensitivity; surface reaction
Funding
- National Nature Science Foundation of China [50872071, 50972079]
- Nature Science Foundation of Shandong Province [Y2007F03, Y2008F26]
- Foundation of Outstanding Young Scientists in Shandong Province [2006BS04030]
- Tai Shan Scholar Foundation of Shandong Province
- Gong Guan Foundation of Shandong Province [2008GG10003019]
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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.
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