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Published on: April 18, 2013
Screen printed graphite macroelectrodes for the direct electron transfer of cytochrome c
Maria Gómez-Mingot1, Jesús Iniesta, Vicente Montiel
1Physical Chemistry Department, Institute of Electrochemistry, University of Alicante, San Vicente del Raspeig, Spain.
Abstract:
We report the direct electrochemistry of cytochrome c at screen printed graphite electrodes which exhibits quasi-reversible voltammetric responses without the need for any chemical or electrochemical pre-treatment, use of mediators or nanomaterials. Through voltammetric studies and X-ray photoelectron spectroscopy (XPS) it is shown that carbonyl and carboxylic surface oxygenated species likely residing at edge plane like- sites/defects of the graphite comprising the screen printed electrodes are responsible for the favourable interaction of the cytochrome c with that of the screen printed electrochemical sensing platform.

