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

The properties of redox active polydopamine melanin (PDM) films as a coating material for neural 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 at 0.2V (vs Ag/AgCl) and reduce the...

Full description

Saved in:
Bibliographic Details
Published in:Journal of materials chemistry. B, Materials for biology and medicine Materials for biology and medicine, 2016-01, Vol.4 (18), p.3031-3036
Main Authors: Kwon, Ik Soo, Kim, Young Jo, Klosterman, Luke, Forssell, Mats, Fedder, Gary K, Bettinger, Christopher J
Format: Article
Language:English
Subjects:
Asymmetry
Biology
Conduction
Electrodes
Impedance
Melanin
Product data management
Stimulation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The properties of redox active polydopamine melanin (PDM) films as a coating material for neural 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 at 0.2V (vs Ag/AgCl) and reduce the interfacial impedance compared to inorganic conducting films. PDM films exhibited an asymmetric impedance response to positive and negative dc biases with minimum interfacial impedance at 0.2V (vs Ag/AgCl). An explanation for the observed bias-dependent electrochemical behavior is presented.
ISSN:2050-750X
2050-7518
DOI:10.1039/c5tb02618k