title: Metal oxide gas sensors: sensitivity and influencing factors.
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.
authors.affiliation: Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials, Ministry of Education, Shandong University, Jinan, 250061, China. xiaowang412@163.com
authors.forename: Chengxiang
authors.initials: C
authors.lastname: Wang
authors.forename: Longwei
authors.initials: L
authors.lastname: Yin
authors.forename: Luyuan
authors.initials: L
authors.lastname: Zhang
authors.forename: Dong
authors.initials: D
authors.lastname: Xiang
authors.forename: Rui
authors.initials: R
authors.lastname: Gao
mesh_terms: D005740:Gases / Q000032:analysis*; D008670:Metals / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D010316:Particle Size; D013696:Temperature
chemical_list: D005740:Gases; D008670:Metals; D010087:Oxides