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수정튜닝포크를 이용한 고분자 와이어 기반 센서의 민감도 향상법 개발 : Enhanced Sensitivity of a Polymer Wire Sensor Based on a Quartz Tuning Fork 원문보기

  • 저자

    이성재

  • 학위수여기관

    포항공과대학교 일반대학원

  • 학위구분

    국내석사

  • 학과

    화학공학과

  • 지도교수

    전상민

  • 발행년도

    2014

  • 총페이지

  • 키워드

    Polymer Sensor Quartz tuning fork;

  • 언어

    eng

  • 원문 URL

    http://www.riss.kr/link?id=T13533508&outLink=K  

  • 초록

    A polymethylmethacrylate (PMMA) and polyvinylcinnamate (PVCN) microwire were attached between the two prongs of a quartz tuning fork (QTF) to form a polymer bridge. The resonance frequency and Q factor of each QTF were measured simultaneously. The resonance frequency of a PMMA wire connected QTF decreased when the relative humidity increased, because water molecules effected as a plasticizer. To enhance the signal of the QTF, additional PMMA wires were attached. The small frequency change could be amplified by increasing the number of attached wires. Similarly, exposure of a PVCN wire-connected QTF to ethanol vapor decreased the modulus of the wire, resulting in a decrease in the resonance frequency. The photocrosslinking of the PVCN wire enhanced the sensitivity of the QTF sensor and offered a facile route to developing a sensor with a tunable resonance frequency.


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