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Sensors 2011, 11(4), 4425-4437; doi:10.3390/s110404425

Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors

Faculty of Microsystem Electronics and Photonics, Wrocław University of Technology, 50-372 Wrocław, Poland
Faculty of Chemistry, Wrocław University of Technology, 50-373 Wrocław, Poland
Author to whom correspondence should be addressed.
Received: 2 March 2011 / Revised: 1 April 2011 / Accepted: 6 April 2011 / Published: 15 April 2011
(This article belongs to the Special Issue Gas Sensors - 2010)
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The paper presents the results of our investigation on the effect of the molecular structure of organic vapors on the characteristics of resistive chemical gas sensors. The sensors were based on tin dioxide and prepared by means of thick film technology. The electrical and catalytic examinations showed that the abstraction of two hydrogen atoms from the organic molecule and formation of a water in result of reaction with a chemisorbed oxygen ion, determine the rate of oxidation reactions, and thus the sensor performance. The rate of the process depends on the order of carbon atoms and Lewis acidity of the molecule. Therefore, any modification of the surface centers of a sensor material, modifies not only the sensor sensitivity, but also its selectivity.
Keywords: gas sensor; molecular structure; alcohol; oxidation reaction; Lewis acidity gas sensor; molecular structure; alcohol; oxidation reaction; Lewis acidity
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Teterycz, H.; Halek, P.; Wiśniewski, K.; Halek, G.; Koźlecki, T.; Polowczyk, I. Oxidation of Hydrocarbons on the Surface of Tin Dioxide Chemical Sensors. Sensors 2011, 11, 4425-4437.

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