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  • 08월 18일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제108회 대한화학회 학술발표회, 총회 및 기기전시회 안내 All-solid-state ion-selective membrane electrodes doped with solvent-soluble conducting polymers to improve sensor’s stability and lifetime

2011년 8월 5일 15시 42분 30초
Ⅳ-ELEC.P-313 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
금 <발표Ⅳ>
저자 및
허민, 서보찬, 김인태, 차근식, 남학현, 신재호
광운대학교 화학과, Korea
Ion-selective electrodes (ISEs) have been extensively employed for industrial, environmental, and clinical analyses. Although poly(vinyl chloride) (PVC) has been a common polymeric matrix to prepare ion-selective membranes, its utility for all-solid-state-type sensors has been limited due to poor adhesion to the electrode surface, eventually detracting the sensor’s lifetime. To overcome such a problem, the use of silicone rubber (SR) has attracted attention as an alternative owing to its strong adhesion to various metallic electrode surfaces. Unfortunately, its applications has been, however, restricted because of severe noise levels in the sensor signal, which are mainly caused by SR’s high membrane resistance. Herein we employ a solvent-soluble conducting polymer to reduce the membrane resistance. Furthermore, incorporation of a conducting polymer into the ion-selective SR membrane may allow to improve ion-to-electron transduction between two different phases, i.e., the polymeric sensing membrane and the metallic electrode. A series of solvent-soluble benzobisthiazole- and ethylenedioxythiophene-type conducting polymers are used to prepare all-solid-state potassium-, sodium-, and proton-selective SR membranes. The electrochemical properties of ISEs are evaluated in terms of sensor’s drift, noise levels, and impedance. In addition, the effect of surfactants on long-term sensor performance is investigated.