Nanostructured conductive polymers have attracted growing attention due to their potential applications. Up to now, conducting polymer nanowires were primarily obtained with porous membrane as template. In this communication, the electrosynthesis of wire/tube-like polypyrrole nanostructures without using a template will be presented. These structures are obtained by electrochemical oxidation of pyrrole in the presence of jointly weak-acid and non-acid anions. The growth mechanism of these nanostructures will be discussed. Notably, it will be highlighted that the presence, at the electrode-solution interface, of weak-acid anions is essential.

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