|
|||||
|
|
Fluctuation-enhanced gas sensing |
|
| Authors: | V. Aroutiounian Z. Mkhitaryan A. Adamian C.-G. Granqvist L. Kish |
| Affiliation: | 1. Center for Semiconductor Devices and Nanotechnologies, Yerevan State University, 0025Yerevan, Armenia;2. Department of Engineering Sciences, The Ångström Laboratory, Uppsala University, P.O. Box 534, SE-75121 Uppsala, Sweden;3. Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX 77843-3128, USA |
| Abstract: | The sensitivity of gas sensors was earlier measured by classical method-comparison the resistance of sensors in gas media and air. Here we reported results of the study of low-frequency noise characteristics of sensors. We compare data for different Figaro TGS sensors as well as our sol-gel H2 tin dioxide and porous silicon sensors. The study was performed in dry air and in a mix of dry air with carbon monoxide, hydrogen and alcohol of different concentrations. Higher sensitivity of spectral dependence of noise (SDN) to gas concentration in comparison with classical method of the measurements of gas sensing by a change in the Ohmic resistance part of current-voltage characteristics of samples allows using such SND powerful method for determination of gas concentration in the air or environment. |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ | |