Abstract

Poly(3,4-ethylenedioxythiophene) nanowires (nw-PEDOT), between 6.7-13.8 nm diameter, were obtained by electrochemical methods utilizing modified electrodes with silicon oxide as a template to afford a Pt/nw-PEDOT electrode. Dopamine electro-polymerization was next accomplished upon this electrode (Pt/nw-PEDOT/PDA). The Pt/nw-PEDOT/PDA assembly is capable of hindering interfering signals such as those from ascorbic and uric acid, enabling thus the selective detection of dopamine. Amperometric determination studies allowed limit of detection and limit of quantification limits of 0.47 and 1.59 A mu M, respectively, to be established. These limits were lower than those obtained with the same conducting polymer but without a nanowire structure.