한국전기전자재료학회논문지 (Journal of the Korean Institute of Electrical and Electronic Material Engineers)

  • 제29권5호
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  • Pages.312-316
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  • 2016
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  • 1226-7945(pISSN)
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  • 2288-3258(eISSN)
한국전기전자재료학회 (The Korean Institute of Electrical and Electronic Material Engineers)
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MWCNT/ZnO 복합체 필름을 이용한 가스센서의 NOx가스 검출 특성 분석

The Analysis of NOx Gas Detection Characteristics for the Gas Sensor Using the MWCNT/ZnO Composites Film

  • Kim, Hyun-Soo (Department of Electrical Engineering, Gachon University) ;
  • Lee, Won-Jae (Department of Electronics Engineering, Gachon University) ;
  • Park, Yong-Seo (Department of Electrical Engineering, Gachon University) ;
  • Jang, Kyung-Uk (Department of Electrical Engineering, Gachon University)
  • 투고 : 2016.04.06
  • 심사 : 2016.04.15
  • 발행 : 2016.05.01
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초록

In this study, we fabricated $NO_x$ gas sensor by using multi-walled carbon nanotubes(MWCNT)/zinc oxide(ZnO) composite film. Carbon nanotubes (CNTs) have good electronic, chemical-stability, and sensitivity characteristics. And zinc oxide (ZnO) is a wide band gap and large exciton binding energy semiconductor. In particular, gas sensors require characteristics such as high speed, sensitivity, and selectivity. The fabricated gas sensor was used to detect $NO_x$ gas for different values of the $NO_x$ gas concentrations. The gas sensor that absorbed$NO_x$ gas molecules showed a increasing in resistance. The sensitivity of the gas sensor was increased by increasing the gas concentrations. Additionally, while changing the temperature inside the chamber for the MWCNT/ZnO composite film gas sensor, we obtained the sensitivity. And the comparison analysis to ZnO film gas sensor for detecting $NO_x$ gas. From the experiment result, we confirmed improvement of $NO_x$ gas detection characteristics using the MWCNT/ZnO composite film.

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