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Ethanol Gas Sensing Properties of In2O3 Nanowires Coated with Co3O4 Nanoparticles

Co3O4 나노입자가 코팅된 In2O3 나노와이어의 에탄올 가스 검출 특성

Park, Sunghoon;Kang, Wooseung
박성훈;강우승

  • Received : 2016.01.22
  • Accepted : 2016.02.13
  • Published : 2016.02.29

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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