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Fluctuation-enhanced gas sensing
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2009 (English)Conference paper, Published paper (Refereed)
Abstract [en]

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 H-2 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.

Place, publisher, year, edition, pages
2009. Vol. 1, no 1, 216-219 p.
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:uu:diva-139751DOI: 10.1016/j.proche.2009.07.054ISI: 000275995600190OAI: oai:DiVA.org:uu-139751DiVA: diva2:381990
Conference
23rd Eurosensors Conference Lausanne, SWITZERLAND, SEP 06-09, 2009
Available from: 2010-12-29 Created: 2010-12-29 Last updated: 2016-04-14Bibliographically approved

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Granqvist, Claes-Göran

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