Control of the Electron Transfer Rate between Cytochrome c and Gold Electrodes by the Manipulation of the Electrode's Hydrogen Bonding Character

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Jianjun Wei, Associate Professor (Creator)
The University of North Carolina at Greensboro (UNCG )
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Abstract: Oxidation and reduction of cytochrome c in solution through 11 different self-assembled monolayers (SAMs) on gold electrodes was investigated with cyclic voltammetry. Electron-transfer rate constants of cytochrome c through the 11 SAMs ranged from =10-4 to ~10-1 cm/s. A strong correlation between the electron transfer rate constants and the hydrogen bonding ability of the SAM is identified. This correlation is discussed in terms of the dependence of the rate constant on the outer-sphere reorganization energy, the double layer, and the electronic coupling between the cytochrome and the differently terminated monolayer films.

Additional Information

Langmuir, 2003, 19(6), 2378-2387.
Language: English
Date: 2003
cytochrome c, self-assembled monolayers (SAMs), electron transfer reactions, redox active protein, biosensors and biocatalytic devices, electrodes

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