Development and characterization of poly(3,4-ethylenedioxythiophene)-coated poly(methylene blue)-modified carbon electrodes

Abstract Poly(3,4-ethylenedioxythiophene) (PEDOT) films have been formed by electropolymerization for the first time on top of poly(methylene blue) (PMB) modified GCE (PMB/GCE), in order to improve PMB modified electrode stability. Experimental conditions, such as electrolyte and fixed potential or potential cycling electrosynthesis have been optimized for PEDOT polymerization on bare GCE. Characterization of PMB modified together with PEDOT/PMB modified and bare GCE was done by cyclic voltammetry and electrochemical impedance spectroscopy (EIS). The operational and storage stability of PEDOT/PMB/GCE was tested. Its good stability and the lack of influence of dissolved oxygen on its electrochemical properties, make it promising for sensor and biosensor applications.

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