Polypyrrole film was photoelectrochemically grown on insulating Ta2O5 anodic film in acetonitrile solution. A characterization byphotocurrent spectroscopy PCS of metal/oxide/polypyrrole interface was carried out. The PCS results suggest that a metallic-likePPy is formed under illumination at constant anodic potential. By polarizing the polypyrrole at cathodic potentials a photocurrentspectrum typical of p-type semiconducting film was recorded. A scanning electron microscopy study of PPy surfaces solution sideand oxide side allowed us to obtain information on the morphology of the polymer as well as a rough estimate of the film thicknessand of the diameter of PPy globules at the two interfaces.
|Numero di pagine||4|
|Rivista||Electrochemical and Solid-State Letters|
|Stato di pubblicazione||Published - 2007|
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