Electrochemically Controlled Formation and Growth of Oxygen Nanobubbles and Their Effect on Morphology of Polypyrrole

Abstract

The electrochemically controlled formation and growth of oxygen nanobubbles were observed on bare highly oriented pyrolytic graphite (HOPG) surface via in-situ electrochemical atomic force microscopy (in-situ EC-AFM). The formation and growth could be well controlled by tuning either the applied voltage or the reaction time. The growth effect of the nanobubbles on pyrrole electropolymerization on the HOPG surface was further studied, demonstrating that the oxygen nanobubbles were responsible for the bubble-shaped nanoscale defects on polypyrrole film.

Key words: electrochemical atomic force microscopy, oxygen nanobubble, highly oriented pyrolytic graphite, polypyrrole

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电化学控制产生纳米氧气气泡及其对电化学聚合吡咯形貌的影响