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스프레이 코팅된 탄소나노튜브 박막을 이용한 알코올 가스 센서

Alcohol Gas Sensors using Spray-coated Carbon Nanotube Thin Film

  • 김성진 (경남대학교 전자공학과)
  • 발행 : 2008.09.01

초록

We suggest a CNT-based gas sensor for breath alcohol measurement. The sensor was composed of single-walled carbon nanotubes (SWCNTs) thin film on flexible PES (polyethersulfone) substrate, and the SWCNTs thin film was formed by multiple spray-coating with SWCNTs solution which was well-dispersed, highly controlled and functionalized in ethanol solvent. In this work, three types of SWCNTs thin films were deposited with changes in the number of spray-coatings to 20, 40 and 60 times in order to compare electrical response properties of the SWCNTs thin films. from the fabricated sensors, conductance and capacitance responses were measured and discussed. Alcohol gas sensors have been commercialized widely as gauge for breath alcohol measurement which is applicable to checking whether car drivers are drinking-driving or not. Our alcohol gas sensors showed good sensitivity and linearity even at room temperature.

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참고문헌

  1. 이영희, "탄소나노튜브의 물성과 응용", 새물리, 51권, p. 84, 2005
  2. 김성진, 조규환, 김성엽, 전재옥, 이상훈, 최복길, "탄소나노튜브 전극으로부터 전자방출에 의한 진공도 측정", 전기전자재료학회논문지, 18권, 5호, p. 396, 2005 https://doi.org/10.4313/JKEM.2005.18.5.396
  3. 이양두, 이정아, 문승일, 박정훈, 한종훈, 유재은, 이윤희, 남산, 주병권, "스크린 프린팅된 탄소나노튜브의 전계방출 특성", 전기전자재료학회 논문지, 17권, 5호, p. 541, 2004
  4. K. Kordas, T. Mustonen, G. Toth, H. Jantunen, M. Lajunen, C. Soldano, S. Talpatra, S. Kar, R. Vajtai, and P. Ajayan, "Inkjet printing of electrically conductive patterns of carbon nanotubes", Small, Vol. 2, p. 1021, 2006 https://doi.org/10.1002/smll.200600061
  5. S. Hur, D. Khang, C. Kocabas, and J. A. Rogers, "Nanotransfer printing by use of noncovalent surface forces: Applications to thin-film transistor that use single-walled carbon nanotube networks and semiconducting polmers", Appl. Phys. Lett., Vol. 85, p. 5730, 2004 https://doi.org/10.1063/1.1829774
  6. K. Y. Park, K. S. Kang, S. J. Kim, S. H. Lee, B. G. Choi, and M. Y. Sung, "Electrical properties of alcohol vapor sensors based on porous silicon", J. of KIEEME(in Korean), Vol. 16, No. 12S, p. 1232, 2003
  7. P. Qi, O. Vermesh, M. Grecu, A. Javey, Q. Wang, H. Dai, S. Peng, and K. Cho, "Toward large arrays of multiplex functionalized carbon nanotube sensors for highly sensitive and selective molecular detection", Nano. Lett., Vol. 3, p. 347, 2003 https://doi.org/10.1021/nl034010k