Ethanol Gas Sensing Properties of In2O3 Nanowires Coated with Co3O4 Nanoparticles
Co3O4 나노입자가 코팅된 In2O3 나노와이어의 에탄올 가스 검출 특성
박성훈;강우승;
Park, Sunghoon;Kang, Wooseung;
인하대학교 신소재공학과;인하공업전문대학 금속재료과;
Department of Materials Science & Engineering, Inha University;Department of Metallurgical & Materials Engineering, Inha Technical College;
DOI : 10.5695/JKISE.2016.49.1.75
$In_2O_3$ 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.
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