Sonoelectrodeposition of poly(pyrrole) films: Electrochemical and morphological effects caused by the ultrasonic amplitude

• Tuning the properties of electrodeposited poly(pyrrole) by the ultrasonic radiation.
• The ultrasound amplitude plays an important role in the interfacial properties of PPy.
• Different morphologies of poly(pyrrole) showed distinct electrochemical behavior.
• EIS experiments indicate that less DBS might be incorporated within PPy under US.

In this manuscript we present the interfacial characterization of poly(pyrrole) films doped with dodecylbenzenesulphonate anions (DBS) electrosynthesized under the influence of ultrasonic radiation. The modified electrodes were studied by means of scanning electron microscopy and electrochemical experiments. It was shown that the ultrasonic radiation changes the morphology of the deposits producing smoother films, with distinct voltammetric behavior. A detailed study employing the electrochemical impedance spectroscopy was done where important features such as the charge-transfer resistance, intercalated charge distribution and double-layer capacitance were discussed. The results showed herein are of great importance on the development and characterization of electroactive surfaces where modified electrodes can be easily obtained by using the ultrasonic radiation and the studies of electrochemical based devices such as sensors, biosensors and supercapacitors can be boosted.

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