센서학회지 (Journal of Sensor Science and Technology)

  • 제15권3호
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  • Pages.211-215
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  • 2006
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  • 1225-5475(pISSN)
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  • 2093-7563(eISSN)
한국센서학회 (The Korean Sensors Society)
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폴리피롤과 산화주석 복합재료를 이용한 센서의 가스 검지 특성

Gas sensing property of polypyrrole and SnO2 composite

  • Kim, Do-Yeon (Department of Material Science Metallurgy, Kyungpook National University) ;
  • Yu, Joon-Boo (Department of Material Science Metallurgy, Kyungpook National University) ;
  • Son, Sung-Ok (Department of Material Science Metallurgy, Kyungpook National University) ;
  • Huh, Jeung-Soo (Department of Material Science Metallurgy, Kyungpook National University)
  • 발행 : 2006.05.31
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초록

Conducting polymer (Polypyrrole) and Tin oxide ($SnO_{2}$) composite films have been fabricated with layer-by-layer technique. $SnO_{2}$ layer was screen-printed on $Al_{2}O_{3}$ substrate and then was dip-coated with polypyrrole (Ppy). The microstructures of composite films were evaluated by a field emission scanning electron microscope (FE-SEM) and FTIR spectral analysis. The change in sensitivity to various VOCs was observed. The target VOCs were methanol, ethanol, benzene and toluene. The sensitivities of the $Ppy/SnO_{2}$ sensor to benzene and toluene were very low at 1000 ppm (2.1 %, 1.5 %), while the sensitivities to methanol and ethanol was high (9 %, 11 %). It indicates that the sensors have selectivity to alcoholic gases such as methanol and ethanol.

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