Abstract
Pyrrole (Py) and thiophene derivatives were electropolymerized on a microphase-separated block copolymer [PEO-b-PMA(Az)] coated ITO electrode in order to form the corresponding conducting polymer nanostructures of perpendicularly oriented and hexagonally arranged cylinders as a template without the removal of one of the domains. Polypyrrole (PPy) nanowires grew through PEO cylindrical domains oriented perpendicular to the electrode to afford an array with an aspect ratio of up to 140 and a density of up to 4.4 × 1012 wires/in.2. Long, straight, π-stacked crystalline structures assigned to PPy main chains were observed in high-resolution TEM images of the individual wires. Additional elaborately crafted electropolymerization was demonstrated on a nanometer scale: (i) stepwise electropolymerization of Py and 3,4-ethylenedioxythiophene (EDOT) afforded segmented PPy–poly(3,4-ethylenedioxythiophene) (PEDOT) and PEDOT–PPy wires with nanoheterojunctions and (ii) one-pot electropolymerization of a mixture of Py a...
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