Impedance and Morphology of Hydroxy- and Chloro-Functionalized Poly(3,4-propylenedioxythiophene) Nanostructures

Guler F. G. , Gilsing H., Schulz B., Sarac A. S.

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, vol.12, no.10, pp.7869-7878, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 12 Issue: 10
  • Publication Date: 2012
  • Doi Number: 10.1166/jnn.2012.6594
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.7869-7878
  • Istanbul Technical University Affiliated: Yes


The new 3,4-propylenedioxythiophenes (ProDOT) bearing hydroxy- or chloro-functionalized side chains of varying length and polarity were synthesized and electropolymerized on single carbon fiber microelectrode (SCFME) using cyclo-voltammetry. Electrochemical impedance spectroscopy (EIS) revealed highest capacitance values for the hydroxy-functionalized Poly 5 carrying a side chain of medium length. The EIS data were fitted with an equivalent electrical circuit giving a good correlation. AFM analysis of the topography showed higher roughness values for Poly 5 than for the two other polymers bearing longer side chains. Due to their reactive end groups the polymers should be useful for post-polymerization functionalization of the electrode surface.