Polypyrrole film was photoelectrochemically grown on insulating Ta2O5 anodic film in acetonitrile solution. A characterization by photocurrent spectroscopy PCS of metal/oxide/polypyrrole interface was carried out. The PCS results suggest that a metallic-like PPy is formed under illumination at constant anodic potential. By polarizing the polypyrrole at cathodic potentials a photocurrent spectrum typical of p-type semiconducting film was recorded. A scanning electron microscopy study of PPy surfaces solution side and oxide side allowed us to obtain information on the morphology of the polymer as well as a rough estimate of the film thickness and of the diameter of PPy globules at the two interfaces.

F DI QUARTO, V FIGà, BOCCHETTA P, M SANTAMARIA (2007). Photoelectrochemical Synthesis of Polypyrrole on Anodic Ta2O5 Films. ELECTROCHEMICAL AND SOLID-STATE LETTERS, 10, H305-H308 [10.1149/1.2767457].

Photoelectrochemical Synthesis of Polypyrrole on Anodic Ta2O5 Films

DI QUARTO, Francesco;FIGA', Viviana;BOCCHETTA, Patrizia;SANTAMARIA, Monica
2007-01-01

Abstract

Polypyrrole film was photoelectrochemically grown on insulating Ta2O5 anodic film in acetonitrile solution. A characterization by photocurrent spectroscopy PCS of metal/oxide/polypyrrole interface was carried out. The PCS results suggest that a metallic-like PPy is formed under illumination at constant anodic potential. By polarizing the polypyrrole at cathodic potentials a photocurrent spectrum typical of p-type semiconducting film was recorded. A scanning electron microscopy study of PPy surfaces solution side and oxide side allowed us to obtain information on the morphology of the polymer as well as a rough estimate of the film thickness and of the diameter of PPy globules at the two interfaces.
2007
Settore ING-IND/23 - Chimica Fisica Applicata
F DI QUARTO, V FIGà, BOCCHETTA P, M SANTAMARIA (2007). Photoelectrochemical Synthesis of Polypyrrole on Anodic Ta2O5 Films. ELECTROCHEMICAL AND SOLID-STATE LETTERS, 10, H305-H308 [10.1149/1.2767457].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10447/16669
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