Electrochemical impedance spectroscopy and in situ UV-vis spectroelectrochemistry studies of Poly(N-vinyl carbazole)/Polydimethylsiloxane composite electrodes

Poly(N-vinyl carbazole)/polydimethylsiloxane (PNVCz/PDMS) composite electrodes were prepared by electrochemical polymerization of NVCz monomer onto PDMS-coated platinum (Pt) and glassy carbon (GC) electrode surfaces to investigate the influence of the insulating constituent, PDMS and process temperature on the capacitive performance of the coated layers. The electrochemical properties of the bilayer coatings were studied by electrochemical impedance spectroscopy and UV-vis spectroelectrochemistry measurements. The low-frequencies capacitance values of composite electrodes indicated that the capacitive behaviors of the composites decreased with increasing PDMS content (from 5.0 to 10.0; in wt/v%) in coating solutions at 25 degrees C, and with decreasing coating temperatures (from 25 degrees C to - 15 degrees C) of PDMS and PNVCz and, more resist PDMS/PNVCz layers formed. Copyright (C) 2011 John Wiley & Sons, Ltd.