6533b862fe1ef96bd12c7361

RESEARCH PRODUCT

Photoelectrochemical Synthesis of Polypyrrole on Anodic Ta2O5 Films

F Di QuartoV FigBocchetta PM Santamaria

subject

Settore ING-IND/23 - Chimica Fisica ApplicataCONDUCTING POLYMERSTHICKNESSMETALSFIELD-EFFECT TRANSISTORSFIELD-EFFECT TRANSISTORS; CONDUCTING POLYMERS; GENERATION; TANTALUM; METALS; THICKNESS; OXIDATIONOXIDATIONTANTALUMGENERATION

description

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.

yearjournalcountryeditionlanguage
2007-01-01
10.1149/1.2767457http://hdl.handle.net/10447/16669