Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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NOx Gas Detecting Properties of the Nitrocellulose/MWCNT Thin Film Coated on the Glass Substrate

유리 기판 위에 제작된 Nitrocellulose/MWCNT 박막의 질소가스 검출특성

  • Lee, Won Jae (Department of Electronic Engineering, Gachon University) ;
  • Choi, Myung Kyu (Department of Electrical Engineering, Gachon University) ;
  • Jang, Kyung Uk (Department of Electrical Engineering, Gachon University)
  • Received : 2012.02.20
  • Accepted : 2012.03.15
  • Published : 2012.03.31
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Abstract

NOx is one of the toxin gases, which is mainly causing the optic-chemical smog phenomena, and decreasing in the function of nose and taste. Especially, NO is easily reacting with $O_3$, and then becoming the $NO_2$. $NO_2$ is mainly causing the acidulation rain. So, we should develop the NOx gas sensing system to detect NOx gas. In this paper, we present the microstructure and the NOx gas detecting properties of the nitrocellulose/MWCNT thin film coated by the air-spray on the glass substrate. The nitrocellulose/MWCNT-based gas sensors have been studied detecting NOx molecules of a ppm-level at the temperature range of $30{\sim}120^{\circ}C$. The resistance of the sensors decreases when the sensors are exposed to NOx gas. As a results, we obtained the nitrocellulose/MWCNT sensors with the sensitivity of 0.6%/sec under the 0.8 ppm of NOx gas concetration. Also, we get the activation energy of 0.202eV from the sensor for the 0.3 ppm of NOx gas concentration.

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