6533b855fe1ef96bd12b078d
RESEARCH PRODUCT
Photoelectrochemical Synthesis of Polypyrrole on Anodic Ta[sub 2]O[sub 5] Films
Viviana FigaMonica SantamariaPatrizia BocchettaF. Di Quartosubject
chemistry.chemical_classificationConductive polymerPhotocurrentMaterials scienceGeneral Chemical EngineeringAnalytical chemistryOxideTantalumchemistry.chemical_elementPolymerPolypyrroleAnodechemistry.chemical_compoundchemistryChemical engineeringElectrochemistryGeneral Materials ScienceElectrical and Electronic EngineeringPhysical and Theoretical ChemistryAcetonitriledescription
Polypyrrole film was photoelectrochemically grown on insulating Ta 2 O 5 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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2007-01-01 | Electrochemical and Solid-State Letters |