Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode | Zendy

Masoud Negahdary | Zendy; Saeed RezaeiZarchi | Zendy; Neda Rousta | Zendy; Soheila Samei Pour | Zendy

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Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode

Author(s) -

Masoud Negahdary,

Saeed RezaeiZarchi,

Neda Rousta,

Soheila Samei Pour

Publication year - 2012

Publication title -

isrn biophysics

Language(s) - English

Resource type - Journals

eISSN - 2090-7362

pISSN - 2090-7354

DOI - 10.5402/2012/937265

Subject(s) - electrochemistry , electrode , biosensor , detection limit , electron transfer , cytochrome c , redox , carbon paste electrode , chemistry , materials science , cytochrome , nanoparticle , nuclear chemistry , inorganic chemistry , nanotechnology , cyclic voltammetry , photochemistry , chromatography , organic chemistry , enzyme , biochemistry , mitochondrion

The direct electrochemistry of cytochrome c (cyt c) immobilized on a modified carbon paste electrode (CPE) was described. The electrode was modified with ZnO nanoparticles. Direct electrochemistry of cytochrome c in this paste electrode was easily achieved, and a pair of well-defined quasireversible redox peaks of a heme Fe (III)/Fe(II) couple appeared with a formal potential (E0) of −0.303 V (versus SCE) in pH 7.0 phosphate buffer solution (PBS). The fabricated modified bioelectrode showed good electrocatalytic ability for reduction of H2O2. The preparation process of the proposed biosensor was convenient, and the resulting biosensor showed high sensitivity, low detection limit, and good stability.

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