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Applied Physics Letters / Volume 96 / Issue 26 / BIOPHYSICS AND BIO-INSPIRED SYSTEMS

Appl. Phys. Lett. 96, 263702 (2010); http://dx.doi.org/10.1063/1.3458698 (3 pages)

Electron transfer mechanism of cytochrome c at graphene electrode

Subbiah Alwarappan1, Rakesh K. Joshi1, Manoj K. Ram2, and Ashok Kumar1,2

1Nanomaterials and Nanomanufacturing Research Center, University of South Florida, Tampa, Florida 33620-5350, USA
2Department of Mechanical Engineering, University of South Florida, 4202 E Fowler Avenue, Tampa, Florida 33620-5350, USA

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(Received 23 April 2010; accepted 8 June 2010; published online 29 June 2010)

We report the direct electron transfer of cytochrome c (Cyt c) observed at graphene electrodes. Graphene nanosheets were chemically synthesized and immobilized on to a glassy carbon electrode. Cyclic voltammetry of Cyt c in phosphate buffered saline was performed at these electrodes. Results indicated a pair of reversible redox waves with a peak-to-peak separation value of 0.07 V in a diffusion controlled electrochemical process. Furthermore, the voltammetric response of these electrodes in Cyt c were found to be stable over time with negligible electrode fouling toward Cyt c.

© 2010 American Institute of Physics

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KEYWORDS and PACS

Keywords

biochemistry, charge exchange, electrochemical electrodes, electrochemistry, graphene, nanostructured materials, oxidation, proteins, reduction (chemical), voltammetry (chemical analysis)

PACS

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3458698

PUBLICATION DATA

ISSN

0003-6951 (print)  
1077-3118 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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