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Sensors 2016, 16(9), 1437; doi:10.3390/s16091437

Selectivity Enhancement by Using Double-Layer MOX-Based Gas Sensors Prepared by Flame Spray Pyrolysis (FSP)

1
Institute of Physical Chemistry, University of Tübingen, Auf der Morgenstelle 15, Tübingen 72076, Germany
2
IWT Foundation Institute of Materials Science, University of Bremen, Badgasteiner Str. 3, Bremen 28359, Germany
*
Author to whom correspondence should be addressed.
Academic Editors: Eduard Llobet and Stella Vallejos
Received: 20 July 2016 / Revised: 29 August 2016 / Accepted: 2 September 2016 / Published: 6 September 2016
(This article belongs to the Special Issue Gas Nanosensors)
View Full-Text   |   Download PDF [12578 KB, uploaded 6 September 2016]   |  

Abstract

Here we present a novel concept for the selective recognition of different target gases with a multilayer semiconducting metal oxide (SMOX)-based sensor device. Direct current (DC) electrical resistance measurements were performed during exposure to CO and ethanol as single gases and mixtures of highly porous metal oxide double- and single-layer sensors obtained by flame spray pyrolysis. The results show that the calculated resistance ratios of the single- and double-layer sensors are a good indicator for the presence of specific gases in the atmosphere, and can constitute some building blocks for the development of chemical logic devices. Due to the inherent lack of selectivity of SMOX-based gas sensors, such devices could be especially relevant for domestic applications. View Full-Text
Keywords: logic device; selectivity; flame spray pyrolysis; gas sensor; double-layer sensor logic device; selectivity; flame spray pyrolysis; gas sensor; double-layer sensor
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rebholz, J.; Grossmann, K.; Pham, D.; Pokhrel, S.; Mädler, L.; Weimar, U.; Barsan, N. Selectivity Enhancement by Using Double-Layer MOX-Based Gas Sensors Prepared by Flame Spray Pyrolysis (FSP). Sensors 2016, 16, 1437.

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