Metal Oxide Gas Sensors: Sensitivity and Influencing Factors

Sensors

Chengxiang Wang²  Longwei Yin¹  Luyuan Zhang²  Dong Xiang² 

[1] Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China;

关键词: metal oxide;    gas sensors;    sensitivity;    surface reaction;   

DOI  :  10.3390/s100302088

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2010 by the authors; licensee Molecular Diversity Preservation International, Basel, Switzerland.