Electrochemical impedance spectroscopy characterization of conducting polymer/TiO2 nanotube array hybrid structures
Résumé
The model suggested by Deslouis and co-workers [14] for describing the behavior of polypyrrole deposited
on a metallic substrate is here used for conducting polymers deposited on a nanostructured 3D semiconducting
substrate. Impedance measurements were performed on a titanium oxide nanotubular array
in the presence of two types of conducting polymers: polypyrrole and poly(3,4-ethylenedioxythiophene),
highlighting the modification of the semiconducting properties of the substrate induced by the polymer
deposition. The model is shown to be particularly well adapted for the PEDOT/TiO2 hybrid structure, providing
a valuable tool for characterizing the interaction between the conducting polymer and the semiconducting
substrate.
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