title: Abnormal gas sensing characteristics arising from catalyzed morphological changes of ionsorbed oxygen.
abstract: Abnormal gas sensing characteristics are observed at low temperature in uniformly loaded Pt@SnO(2) nanorod gas sensors. The sensors operated at 200 degrees C exhibit opposite variations of resistances, and the change of resistance decreases with increasing ethanol concentration. In contrast, the sensors operated at 300 degrees C show regular behavior and the sensitivity is extremely high. Such behaviors are ascribed to Pt-catalyzed morphological changes of ionsorbed oxygen at low temperature. The present results are the bases for further investigating the effect of ionsorbed oxygen morphologies on gas sensing.
authors.affiliation: College of Sciences, Northeastern University, Shenyang, People's Republic of China. xuexinyu@mail.neu.edu.cn
authors.forename: Xin-Yu
authors.initials: XY
authors.lastname: Xue
authors.forename: Zhao-Hui
authors.initials: ZH
authors.lastname: Chen
authors.forename: Yu-Jin
authors.initials: YJ
authors.lastname: Chen
authors.forename: Chun-Hua
authors.initials: CH
authors.lastname: Ma
authors.forename: Li-Li
authors.initials: LL
authors.lastname: Xing
authors.forename: Yan-Guo
authors.initials: YG
authors.lastname: Wang
authors.forename: Tai-Hong
authors.initials: TH
authors.lastname: Wang