Monomer concentration effect on electrochemically modified carbon fiber with poly[1‐(4‐methoxyphenyl)‐1H‐pyrrole] as microcapacitor electrode

Abstract

AbstractIn this study, films of poly[1‐(4‐methoxyphenyl)‐1H‐pyrrole] [poly(MPPy)] were electrochemically grown on carbon fiber microelectrodes (CFMEs) in 0.05 M of tetraethyl ammonium perchlorate–dichloromethane. The effect of different monomer concentrations (range = 1–10 mM) on electrochemical properties of resulting polymers was characterized by cyclic voltammetry, Fourier transform infrared reflectance‐attenuated total reflection spectroscopy, scanning electron microscopy (SEM), atomic force microscopy (AFM), and electrochemical impedance spectroscopy. All modified CFMEs were found to have capacitance on the basis of Nyquist, Bode‐magnitude, Bode‐phase, and Admittance plots. An equivalent circuit model of (R(C(R(QR)))(CR)) gave the best fit for all monomer concentrations used. Furthermore, SEM and AFM results showed that poly(MPPy) was formed as a continuous and well‐adhered film onto CFME. © 2009 Wiley Periodicals, Inc. Adv Polym Techn 28:120–130, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/adv.20152