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Sensors 2016, 16(11), 1815; doi:10.3390/s16111815

Understanding the Potential of WO3 Based Sensors for Breath Analysis

1,2,†
,
1,2,†
and
1,2,†,*
1
Institute of Physical and Theoretical Chemistry (IPTC), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany
2
Center for Light-Matter Interaction, Sensors & Analytics (LISA+), University of Tuebingen, Auf der Morgenstelle 15, D-72076 Tuebingen, Germany
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editors: Woosuck Shin and Toshio Itoh
Received: 6 October 2016 / Revised: 24 October 2016 / Accepted: 26 October 2016 / Published: 29 October 2016
(This article belongs to the Special Issue Gas Sensors for Health Care and Medical Applications)
View Full-Text   |   Download PDF [2346 KB, uploaded 29 October 2016]   |  

Abstract

Tungsten trioxide is the second most commonly used semiconducting metal oxide in gas sensors. Semiconducting metal oxide (SMOX)-based sensors are small, robust, inexpensive and sensitive, making them highly attractive for handheld portable medical diagnostic detectors. WO3 is reported to show high sensor responses to several biomarkers found in breath, e.g., acetone, ammonia, carbon monoxide, hydrogen sulfide, toluene, and nitric oxide. Modern material science allows WO3 samples to be tailored to address certain sensing needs. Utilizing recent advances in breath sampling it will be possible in the future to test WO3-based sensors in application conditions and to compare the sensing results to those obtained using more expensive analytical methods. View Full-Text
Keywords: WO3; breath analysis; gas sensors; SMOX based sensors WO3; breath analysis; gas sensors; SMOX based sensors
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Staerz, A.; Weimar, U.; Barsan, N. Understanding the Potential of WO3 Based Sensors for Breath Analysis. Sensors 2016, 16, 1815.

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