AFM Analysis of Polypyrrole Films Synthesized in the Presence of Selected Doping Agents

作者：Paramo Garcia U^*; Ibanez J G; Batina N

来源：International Journal of Electrochemical Science, 2013, 8(2): 2656-2669.

• polypyrrole
• AFM
• conducting polymer
• electrodeposition
• anion dopants

This paper analyzes surface changes of polypyrrole films deposited on vitreous carbon substrates by electrochemical methods in the presence of different doping anions: I-, Br-, Cl-, F-, NO3-, ClO4- and SO42-. Surface characterization of each electrode modified by electrodeposition at constant potential is performed by atomic force microscopy, AFM. The thickness of PPy films is observed to increase with anion size in halide electrolytes. AFM analysis confirms that the dopant involved in the electrosynthesis of PPy determines the topographic characteristics of the film deposited on a vitreous carbon electrode. The quantitative analysis of the surface roughness of different PPy films, [RMS]Rq establishes definite differences among the various synthesis conditions. Larger anions result in more uniform structures, as the associated nodular sizes are found to be more homogenous. Thick films and large nodule areas result in high film roughness.

• 出版日期2013-2