Direct Electron Transfer of Cytochrome c on ZnO Nanoparticles Modified Carbon Paste Electrode. (25th March 2012)

• Record Type: Journal Article
• Authors: Negahdary, Masoud; Rezaei-Zarchi, Saeed; Rousta, Neda; Samei Pour, Soheila
• Other Names: Bulone D. Academic Editor.; Ponomarenko M. P. Academic Editor.
• Is Part Of: ISRN biophysics. Volume 2012(2012)
• Publication Date: 2012-03-25
• Subjects: Biophysics -- Periodicals; Biophysics; Periodicals; 571.4
• DOI: 10.5402/2012/937265
• Languages: English
• ISSNs: 2090-7354

Abstract

Abstract : 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 ( E 0 ) 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 H2 O2 . The preparation process of the proposed biosensor was convenient, and the resulting biosensor showed high sensitivity, low detection limit, and good stability.