Metal Oxide Gas Sensors: Sensitivity and Influencing Factors

作者：Cheng‐Xiang Wang, Longwei Yin, Luyuan Zhang, Dong Xiang, Rui Gao · 发表于：Sensors · 年份：2010 · DOI：10.3390/s100302088 · 被引用次数：2922 · 研究领域：Gas Sensing Nanomaterials and Sensors、Advanced Chemical Sensor Technologies、Analytical Chemistry and Sensors

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.