期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 8, 期 7, 页码 1137-1141出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2006.05.004
关键词
sulfonated conducting polymer nanotubes; cytochrome c; direct electrochemistry; hydrogen peroxide
Stable electroactive film of poly(aniline-co-o-aminobenzenesulfonic acid) three-dimensional tubal net-works was assembled on indium oxide glass (ITO) successfully, and the cytochrome c was immobilized on the matrix by the electrostatic interactions. The adsorbed cytochrome c showed a good electrochemical activity with a pair of well-defined redox waves in pH 6.2 phosphate buffer solution, and the adsorbed protein showed more faster electron transfer rate (12.9 s(-1)) on the net-works matrix than those of on inorganic porous or even nano-materials reported recently. The immobilized cytochrome c exhibited a good electrocatalytic activity and amperometric response (2 s) for the reduction of hydrogen peroxide (H2O2). The detection limit for H2O2 was 1.5 mu M, and the linear range was from 3 mu M to 1 mM. Poly(aniline-co-o-aminobenzenesulfonic acid) three-dimensional tubal net-works was proved to be a good matrix for protein immobilization and biosensor preparation. (C) 2006 Elsevier B.V. All rights reserved.
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