Morphological and adhesive properties of polypyrrole films synthesized by sonoelectrochemical technique |
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Authors: | Jérôme Dejeu Abdeslam Et Taouil Patrick Rougeot Sophie Lakard Fabrice Lallemand Boris Lakard |
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Affiliation: | 1. Institut FEMTO-ST, CNRS-UFC-ENSMM-UTBM, AS2M Department, 24 rue Alain Savary, 25000 Besançon, France;2. Institut UTINAM, UMR CNRS 6123, University of Franche-Comté, 16 route de Gray, 25030 Besançon Cedex, France |
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Abstract: | This paper presents electrochemical synthesis of polypyrrole films under high frequency sonication. The films are characterized in terms of adhesion and surface morphology. Comparison to classical electrosynthesized polypyrrole films is made. In particular, the use of high frequency sonication (500 kHz) during electrodeposition of polypyrrole on Si was reported for the first time. Chronocoulometry was used for polymer films electrosynthesis on Si substrates. Influence of polymer thickness on the rugosity, morphology and adhesion force properties was studied. Scanning Electron Microscopy and mechanical probe profiling showed that sonication led to less rough and more homogeneous surface structure. Adhesion force properties of polypyrrole films were also studied by means of force–distance curves obtained by atomic force microscopy. For polymer films obtained in the absence of sonication, adhesion forces decreases with increase in polymer thickness. On the contrary, for polymer films obtained under sonication, the adhesion of the films decreased when the polymer thickness decreased. |
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