Journal of Sensor Science and Technology (센서학회지)

The Korean Sensors Society (한국센서학회)
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Fabrication of Methanol Sensors Using Conductive Polypyrrole Nanofibers with a Core-Shell Structure

코아-셀 구조를 가지는 전도성 폴리피롤 나노섬유를 이용한 메탄올 센서 제작

  • Jun, Tae-Sun (Dep. of Bionano Engineering, Hanyang Unv.) ;
  • Lee, Sungho (Micro-nano Process R&D Department, Korea Institute of Industrial Technology) ;
  • Kim, Yong Shin (Dep. of Bionano Engineering, Hanyang Unv.)
  • 전태선 (한양대학교 바이오나노공학과) ;
  • 이성호 (한국생산기술연구원 마이크로나노공정연구그룹) ;
  • 김용신 (한양대학교 바이오나노공학과)
  • Received : 2014.10.06
  • Accepted : 2014.11.10
  • Published : 2014.11.30
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Abstract

Electrically conductive polypyrrole-polyvinylpyrrolidone (PPy-PVP) nanofiber mats with a core-shell structure have been successfully fabricated by a two-step process: the formation of FeCl3-containing PVP nanofiber mat by electrospinning, and the vapor-phase polymerization (VPP) of pyrrole monomer on the mat in a sealed chamber at room temperature. Surface morphology and chemical composition of the PPy-PVP mat were characterized by SEM, EDX and FTIR analyses. The as-prepared nonwoven mat was composed of PPy-PVP nanofibers with an average diameter of 300 nm. The sheet conductivity of the nanofiber mat was measured to be approximately 0.01 S/cm by a four-point probe. We have also investigated gas-sensing properties of PPy-PVP nanofiber mat upon exposure to methanol vapor. The PPy-PVP nanofiber sensors were observed to have excellent methanol-sensing performance. The nanofiber-based core-shell nanostructure could give an opportunity to fabricate a highly sensitive and fast response sensor due to its high surfaceto-volume ratio.

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References

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