N-vinylcarbazole-acrylamide copolymer electrodes - Electrochemical response to dopamine

Copolymers of N-vinylcarbazole and acrylamide were synthesized by the free radical polymerization using AIBN as initiator. Copolymer electrodes were p repared by casting from 3% solution on platinum and stainless steel substra te. Solvent was removed by heating at 110 degrees C in vacuum 10(-3) Pa for 5 h. The response of electrodes to dopamine was rested by cyclic voltammet ry and results suggest that depending on conditions (i.e., scan rates, thic kness of him, composition of copolymer), the electrode shows reversible and stable behavior during the 14 days and it seems to be a suitable sensor el ectrode to dopamine. Stability of copolymer coating was investigated for st ainless steel electrodes in sulfuric acid and it is found that copolymer co ating can inhibit the corrosion of stainless steel up to 94%. (C) 2000 The Electrochemical Society. S0013-4651(99)08-052-0. All rights reserved.