Abstract
Often, electrochemically-induced deposition of conducting polymer films on electrode surfaces fails using potentiostatic, galvanostatic or multisweep deposition procedures if bulky substituents at the monomer, nucleophilic attack at intermediate radical cations, hindered diffusional mass transport of the monomer to the electrode surface or the copolymerization of monomers with different oxidation potentials prevent fast chain propagation. A pulse profile for the electrochemical deposition of conducting polymer films has been developed based on the rationalization of the limiting steps and the concentration profiles in front of the electrode surface. The pulse deposition method could be advantageously applied for the localized deposition of conducting polymers using scanning electrochemical microscopy, for the copolymerization of pyrrole/[Os(2,2′-bipyridine) 2(3-{pyrrole-1-ylmethyl}pyridine)Cl] + and for the entrapment of enzymes within the growing ramified network of the polymer.
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