Electrochemical characterisation of poly(3,4-ethylenedioxythiophene) film modified glassy carbon electrodes prepared in deep eutectic solvents for simultaneous sensing of biomarkers
By Prathish, Krishna P.; Carvalho, Ricardo C.; Brett, Christopher M. A.
Published in Electrochimica Acta
2016
Abstract
Abstract Electrodeposition of the conducting polymer, poly(3,4-ethylenedioxythiophene) (PEDOT) in deep eutectic solvents (DES), prepared by the simple mixing and heating of an H-bond acceptor, choline chloride and H-bond donors such as urea, ethylene glycol and glycerol, is described. The {PEDOT} modified glassy carbon electrodes prepared in different {DES} and in the presence of conventional aqueous surfactants or {HClO4} media were characterized during and after growth by electrochemical and quartz crystal microbalance studies. {PEDOT} synthesized in the best performing {DES} medium, choline chloride - urea (Reline) in the presence of HClO4, was used for the sensing of the biologically relevant molecules ascorbic acid, dopamine and uric acid. The sensing characteristics were compared with those of PEDOT-modified electrodes prepared in aqueous media.