Morphological and adhesive properties of polypyrrole films synthesized by sonoelectrochemical technique.

Jérôme Dejeu (1) , Abdeslam Et Taouil (2) , Patrick Rougeot (1) , Sophie Lakard (2) , Fabrice Lallemand (2) , Boris Lakard (2)

1 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)
2 UTINAM - Univers, Transport, Interfaces, Nanostructures, Atmosphère et environnement, Molécules (UMR 6213)

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.

Mots clés: Polypyrrole; Electrochemistry; Atomic force microscopy; Adhesion force or pull-off force; Sonochemistry; Adhesion force or pull-off force.

Domaines: Micro et nanotechnologies/Microélectronique

Jérôme Dejeu, Abdeslam Et Taouil, Patrick Rougeot, Sophie Lakard, Fabrice Lallemand, et al.. Morphological and adhesive properties of polypyrrole films synthesized by sonoelectrochemical technique.. Synthetic Metals, 2010, 160 (23-24), pp.2540-2545. ⟨10.1016/j.synthmet.2010.10.002⟩. ⟨hal-00605877⟩