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Issue 18, 2016
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In vitro electrochemical characterization of polydopamine melanin as a tissue stimulating electrode material

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Abstract

The properties of redox active polydopamine melanin (PDM) films as a coating material for tissue stimulation electrodes were evaluated. PDM films with nanometer-scale thicknesses exhibit dc bias dependent charge injection capacities (CIC) with maximum values of 110 ± 23 μC cm−2 at 0.2 V (vs. Ag/AgCl) and reduce the interfacial impedance compared to inorganic conducting films. PDM films exhibit an asymmetric impedance response to positive and negative dc biases with minimum interfacial impedance at 0.2 V (vs. Ag/AgCl). An explanation for the observed bias-dependent electrochemical behavior is presented.

Graphical abstract: In vitro electrochemical characterization of polydopamine melanin as a tissue stimulating electrode material

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Supplementary files

Article information


Submitted
11 Dec 2015
Accepted
18 Feb 2016
First published
23 Feb 2016

J. Mater. Chem. B, 2016,4, 3031-3036
Article type
Communication

In vitro electrochemical characterization of polydopamine melanin as a tissue stimulating electrode material

I. S. Kwon, Y. J. Kim, L. Klosterman, M. Forssell, G. K. Fedder and C. J. Bettinger, J. Mater. Chem. B, 2016, 4, 3031
DOI: 10.1039/C5TB02618K

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