Polypyrrole/copper hexacyanoferrate hybrid as redox mediator for glucose biosensors

Autor(es)

Fiorito‚ P.A. ; Brett‚ C. ; Córdoba de Torresi‚ S.I.

• Tipo de documento: Artigo Científico
• Fonte: Talanta; v. 69, n. 2, p. 403-408, 2006.

Resumo

A copper containing Prussian Blue analogue was incorporated into a conducting polypyrrole film. The modified electrode was synthesized through an electrochemical two-step methodology leading to very stable and homogeneous hybrid films. These electrodes were proved to show excellent catalytic properties towards H2O2 detection, with a performance higher than those observed for Prussian Blue and other analogues. Electrochemical impedance spectroscopy experiments demonstrated that the excellent performance of these hybrid films is strongly related to the electronic conductivity of the polymeric matrix that is wiring the copper hexacyanoferrate sites. A glucose biosensor was built-up by the immobilization of glucose oxidase; the sensitivity obtained being higher than other biosensors reported in the literature even in Na+ containing electrolytes. (C) 2005 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 03/07568-0 - Sintese e caracterizacao de filmes nanoestruturados funcionalizados com corantes visando propriedades eletro-opticas intensificadas.
• Beneficiário: Susana Inés Córdoba de Torresi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 03/10015-3 - Arranjos organizados de macromoléculas e nanoestruturas para o desenvolvimento de sensores e microbaterias
• Beneficiário: Roberto Manuel Torresi
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático