Polypyrrole (PPy) has been chemically and electrochemically synthesized inside the pens of home-made nanoporous polycarbonate (PC) Particle Track-etched Membranes (nano-PTM). The morphologies of the obtained PPy nanostructures have been carefully studied using a Field-Effect Scanning Electron Microscope (FE-SEM). By chemical synthesis, perfectly cylindrical 15 nm diameter PPy tubules have been successfully prepared.
Demoustier, S., Duchet, J., & Legras, R. (1999). Chemical and electrochemical synthesis of polypyrrole nanotubules. Synthetic Metals, 101(1-3), 20-21. https://doi.org/10.1016/S0379-6779(98)00813-3 (Original work published 1999)