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Sensors 2015, 15(10), 27035-27046; doi:10.3390/s151027035

Nanostructured Tungsten Oxide Composite for High-Performance Gas Sensors

1
Escuela Secundaria de la Universidad de Puerto Rico, San Juan, PR 00936, USA
2
Department of Chemistry, King Saud University, Riyadh 11451, Saudi Arabia
3
Department of Physics, University of Puerto Rico, San Juan, PR 00936, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Michael Tiemann
Received: 9 June 2015 / Revised: 5 October 2015 / Accepted: 19 October 2015 / Published: 23 October 2015
(This article belongs to the Special Issue Gas Sensors—Designs and Applications)
View Full-Text   |   Download PDF [1266 KB, uploaded 26 October 2015]   |  

Abstract

We report the results of composite tungsten oxide nanowires-based gas sensors. The morphologic surface, crystallographic structures, and chemical compositions of the obtained nanowires have been investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), and Raman scattering, respectively. The experimental measurements reveal that each wire consists of crystalline nanoparticles with an average diameter of less than 250 nm. By using the synthesized nanowires, highly sensitive prototypic gas sensors have been designed and fabricated. The dependence of the sensitivity of tungsten oxide nanowires to the methane and hydrogen gases as a function of time has been obtained. Various sensing parameters such as sensitivity, response time, stability, and repeatability were investigated in order to reveal the sensing ability. View Full-Text
Keywords: tungsten oxide composite nanowires; gas sensor; sensitivity; response tungsten oxide composite nanowires; gas sensor; sensitivity; response
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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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MDPI and ACS Style

Chen, S.F.; Aldalbahi, A.; Feng, P.X. Nanostructured Tungsten Oxide Composite for High-Performance Gas Sensors. Sensors 2015, 15, 27035-27046.

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