Electrochemical Properties of Polypyrrole-Glucose Oxidase Enzyme Electrode Depending on Dopant Size

Polypyrrole-Glucose Oxidase 효소전극의 배위자 크기에 따른 전기 화학적 특성

  • 김현철 (전남대학교 전기공학과) ;
  • 구할본 (전남대학교 전기공학과) ;
  • 사공건 (동아대학교 전기공학과)
  • Published : 2001.07.01

Abstract

We synthesized polypyrrole (PPy) by electrolysis of the pyrrole monomer solution containing support electrolyte KCl and/or p-toluene sulfonic acid sodium salt (p-TS). The electrochemical behavior was investigated using cyclic voltammetry and AC impedance. In the case of using electrolyte p-TS, the redox potential was about -0.3 V vs. Ag/AgCl reference electrode, while the potential was about 0 V for using electrolyte KCl. It is considered as the backbone forms a queue effectively by doping p-T S. Therefore, it is possible to be arranged regularly. That leads to improvement in the electron hopping. The AC impedance plot gave a hint of betterment of mass transport. PPy doped with p-TS has improved in mass transport, or diffusion. That is because the PPy doped with p-TS has a good orientation, and is more porous than PPy with KCl.

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