Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Biomimetic MIP Terpene Sensors Adding Conductive Polymers

전도성 고분자가 첨가된 생체 모방형 분자 각인 고분자 테르펜 센서

  • Jung, Jae-Hun (Department of Electronic Engineering, Kyungnam University) ;
  • Lee, Sung-Pil (Department of Electronic Engineering, Kyungnam University)
  • Received : 2012.07.17
  • Accepted : 2012.08.17
  • Published : 2012.09.30
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Abstract

Biomimetic terpene sensors which have high sensitivity and stability have been fabricated using moleculary imprinted polymer (MIP) technology. Since it is impossible to make a resistive type sensor due to the high resistance of MIP, we improved the sensor by adding conductive polymers. We investigated the sensitivity of resistive type sensors with nano particles depending on the amount of conductive polymers. The MIP membrane contained the methacrylic acid as functional monomer and ethylene glycol dimethacrylate as cross linker, which formed specific cavities originated by the target terpene molecules. The mixture of MIP and the conductive polymer was coated on the patterns of interdigit electrodes on the alumina substrate. The fabricated sensors showed their highest specific sensitivities exposed to 500 ppm target gases : limonene 0.055 at 40% of amount of conductive polymers and geraniol $5.84{\times}10^{-4}$ at 20% of amount of conductive polymers. In conclusion, we found that the terpene sensors are affected by the target molecules, functional monomers and the conductive polymers.

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