Impedance spectra of polypyrrole coated platinum electrodes

Polypyrrole (PPy) coated electrodes may provide new solutions to increase the charge injection capacity and biocompatibility of metal electrodes in e.g., neural stimulus applications. In this study, electrical impedance spectra of PPy coated platinum (Pt) electrodes having three different coating th...

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Bibliographic Details
Main Authors: Onnela, Niina, Savolainen, Virpi, Hiltunen, Maiju, Kellomaki, Minna, Hyttinen, Jari
Format: Conference Proceeding
Language:English
Subjects:
Charge transfer
Coatings
Electrodes
Impedance
Polymers
Resistance
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Summary:Polypyrrole (PPy) coated electrodes may provide new solutions to increase the charge injection capacity and biocompatibility of metal electrodes in e.g., neural stimulus applications. In this study, electrical impedance spectra of PPy coated platinum (Pt) electrodes having three different coating thicknesses were measured and modeled. A suitable equivalent electrical circuit providing the material characteristics was chosen and the impedance data was analyzed using the model and data fitting. The modeled parameter values of different coating thicknesses were compared and our results demonstrated the changes in charge transfer properties and mechanisms of thin and thick PPy film coatings.
ISSN:1094-687X
1558-4615
2694-0604
DOI:10.1109/EMBC.2013.6609556