title: Electrosynthesis and characterization of conducting polypyrrole elaborated under high frequency ultrasound irradiation.
abstract: The effects of high frequency ultrasound (500kHz) on pyrrole electropolymerization in sodium perchlorate aqueous medium have been investigated. Cyclic voltametry studies showed that there is no influence on pyrrole oxidation potential. Scanning Electron Microscopy (SEM) imaging, and mechanical and optical profiling, revealed thinner, denser and more homogeneous surface structure for polypyrrole films elaborated under ultrasound irradiation. This is attributed to cavitation bubble asymmetric collapse close to the interface, which should induce changes in the nucleation-growth mechanism during the first polymerization stage. An increase of approximately 27% in doping level for sonicated films was revealed by X-ray Photoelectron Spectroscopy (XPS) analyses.
authors.affiliation: Institut UTINAM, UMR 6213 CNRS, Université de Franche-Comté, 30 Avenue de l'observatoire, 25009 Besançon, Cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Et Taouil
authors.forename: F
authors.initials: F
authors.lastname: Lallemand
authors.forename: J Y
authors.initials: JY
authors.lastname: Hihn
authors.forename: V
authors.initials: V
authors.lastname: Blondeau-Patissier
mesh_terms: D004553:Electric Conductivity; D004563:Electrochemistry; D004566:Electrodes; D010084:Oxidation-Reduction; D010316:Particle Size; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry; D011758:Pyrroles / Q000138:chemical synthesis* / Q000737:chemistry; D013499:Surface Properties; D014465:Ultrasonics
chemical_list: D011108:Polymers; D011758:Pyrroles; C067635:polypyrrole