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http://dx.doi.org/10.5695/JKISE.2016.49.1.75

Ethanol Gas Sensing Properties of In2O3 Nanowires Coated with Co3O4 Nanoparticles  

Park, Sunghoon (Department of Materials Science & Engineering, Inha University)
Kang, Wooseung (Department of Metallurgical & Materials Engineering, Inha Technical College)
Publication Information
Journal of the Korean institute of surface engineering / v.49, no.1, 2016 , pp. 75-80 More about this Journal
Abstract
$In_2O_3$ nanowires were coated with $Co_3O_4$ nanoparticles to investigate the improvement of ethanol gas sensing performance compared with as-synthesized $In_2O_3$ nanowires. Scanning electron microscopy showed that the nanowires synthesized by VLS mechanism had diameters and lengths of approximately 50-100 nm and a few micrometers, respectively. $Co_3O_4$ nanoparticles produced by hydrothermal method was in the size range of a few to a few tens nm. As-synthesized and $Co_3O_4$ nanoparticles coated $In_2O_3$ nanowires sensors exhibited responses of 1.96% and 4.57%, respectively for the ethanol gas concentration of 200 ppm at $200^{\circ}C$. The underlying mechanism for the improved responses of $Co_3O_4$ nanoparticles coated $In_2O_3$ nanowires sensors is discussed.
Keywords
$In_2O_3$ nanowires; $Co_3O_4$ nanoparticles; Ethanol; Gas sensor;
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