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New approaches for improving selectivity and sensitivity of resistive gas sensors: A review Cover

New approaches for improving selectivity and sensitivity of resistive gas sensors: A review

Open Access
|Feb 2020

Abstract

Resistive gas sensors are very popular and reliable but suffer from low selectivity and sensitivity. Various methods have been suggested to improve both features without increasing the number of sensors in gas detection systems. Fluctuation enhanced gas sensing was proposed to improve gas detection efficiency by analyzing low-frequency resistance fluctuations, and noise parameters can be more informative than the single DC resistance and can advance gas detection systems by improving detection and limiting energy consumption. Gas sensor temperature can be modulated as well to further increase selectivity and sensitivity. Finally, some gas sensing layers exhibit a photo-catalytic effect, which can be applied to improve detection and yield lower operating temperatures of the gas sensing materials.

Language: English
Page range: 1 - 6
Published on: Feb 15, 2020
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year

© 2020 Janusz Smulko, Maciej Trawka, Radu Ionescu, Fatima E. Annanouch, Eduard Llobet ETSE-DEEEA, Claes G. Granqvist, Laszlo B. Kish, published by Professor Subhas Chandra Mukhopadhyay
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.