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Diamond nanotextured surfaces for enhanced protein redox activity

 
: Yang, N.; Smirnov, W.; Kriele, A.; Hoffmann, R.; Nebel, C.E.

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Physica status solidi. A 207 (2010), No.9, pp.2069-2072
ISSN: 0031-8965
ISSN: 1862-6300
ISSN: 1521-396X
ISSN: 1862-6319
English
Journal Article
Fraunhofer IAF ()
biomolecular trap; cytochrome c; diamond nanostructure; protein electrochemistry

Abstract
A nanotextured diamond electrode was utilized to achieve optimized electrochemical redox-interactions of cytochrome c (cyt c) with the diamond transducer. The nanotextured surface was realized using a top-down technology where diamond nanoparticles are used as etching masks. Macroscopic characterizations of the OH-terminated surface using cyclic voltammetry reveal adsorption-controlled cyt c/electrode interaction. The adsorption is assigned to the electrostatic attraction force of positively charged cyt c parts with the slightly negatively charged diamond surface in pH 7 buffer. Atomic force microscopy experiments in physiologic buffer solutions on flat diamond surface confirms the adsorption of cyt c on OHterminated diamond surfaces without structural changes of cyt c.

: http://publica.fraunhofer.de/documents/N-145057.html