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http://dx.doi.org/10.5369/JSST.2010.19.6.497

Parylene membrane based chemomechanical explosive sensor  

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)
Publication Information
Journal of Sensor Science and Technology / v.19, no.6, 2010 , pp. 497-503 More about this Journal
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.
Keywords
Explosive; MEMS; Nano mechanics; Membrane sensor;
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Times Cited By KSCI : 2  (Citation Analysis)
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