Electrochemistry
Online ISSN : 2186-2451
Print ISSN : 1344-3542
Communications
Reagentless H2O2 Biosensor with High Electron Transfer Efficiency Carrying Nanocomplex of Horseradish Peroxidase and Au-Nanoparticle
Yusuke OKAWAYoshinori SAKAIFumiyuki SHIBA
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JOURNALS OPEN ACCESS

2008 Volume 76 Issue 8 Pages 522-524

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Abstract

A novel electrochemical biosensor for hydrogen peroxide with high electron transfer efficiency was developed using a nanocomplex composed of horseradish peroxidase and Au-nanoparticle. The nanocomplex was prepared through adsorption of horseradish peroxidase on an Au-nanoparticle. The nanocomplexes were easily coagulated and immobilized on an ITO electrode as a monolayer film by simply casting the nanocomplex dispersion and drying below 10°C. The electrode worked as a hydrogen peroxide biosensor featuring high electron transfer efficiency without any soluble mediator at a mild electrode potential of +0.15 V vs. Ag/AgCl.

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© 2008 The Electrochemical Society of Japan
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