期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 177, 期 -, 页码 1128-1133出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.12.022
关键词
Gas sensitivity; Damping; Tellurium; Ultrathin layers; NO2
资金
- SCSTD of Academy of Sciences of Moldova [11.817.05.21A]
The damping of sensitivity induced by high gas (NO2) concentration in tellurium films was observed for the first time. The phenomenon becomes apparent in ultrathin (less than 40 nm) shown by AFM, SEM and XRD analyses to be in amorphous state. Sensitivity of 30 nm thickness Te film decreases near linearly with concentration increase between 150 and 500 ppb of nitrogen dioxide. Results are explained in terms of formation of a nitrogen dioxide catalytic gate in which a molecule adsorbs (and desorbs) without reacting. (c) 2012 Published by Elsevier B.V.
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