Journal
ANALYST
Volume 136, Issue 10, Pages 2146-2150Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0an00712a
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Funding
- Ministerio de Educacion y Ciencia MEC Spain [CTQ2006-14959, CTQ2007-62345]
- University of Alicante
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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.
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