Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Parylene membrane based chemomechanical explosive sensor

패럴린 박막을 이용한 기계화학적 폭발물 센서

  • Shin, Jae-Ha (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Lee, Sung-Jun (School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Cha, Mi-Sun (Institute of Advanced Machinery and Design, Seoul National University) ;
  • Kim, Mun-Sang (Center for Intelligent Robotics, Korea Institute of Science and Technology) ;
  • Lee, Jung-Hoon (Institute of Advanced Machinery and Design, Seoul National University)
  • 신재하 (서울대학교 기계항공공학부) ;
  • 이성준 (서울대학교 기계항공공학부) ;
  • 차미선 (서울대학교 정밀기계연구소) ;
  • 김문상 (한국과학기술연구원 지능로봇사업단) ;
  • 이정훈 (서울대학교 정밀기계연구소)
  • Received : 2010.10.05
  • Accepted : 2010.11.25
  • Published : 2010.11.30
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Abstract

This paper reports a chemomechanical explosive sensor based on a thin polymer membrane. The sensor consists of thin parylene membrane and electrodes. Parylene membrane is functionalized with 4-mercaptophenol which interacts strongly with nitrotoluene based explosives. The membrane deflection caused by molecular interaction between the surface and explosives is monitored by capacitance between the membrane and the substrate. To measure the capacitance, electrodes are formed on the membrane and the substrate. While the previous cantilever system requires a bulky optical measuring system, this purely electric monitoring method offers a compact and effective system. Thus, this explosive sensor can be readily miniaturized and used in the field. The developed sensor can reliably detect dinitrotoluene and its limit of detection is evaluated as approximately 110 ppb.

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References

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