Polycarbazole modified carbon fiber microelectrode: Surface characterization and dopamine sensor

ATEŞ M., Sarac A. S., Turhan C. M., Ayaz N. E.

FIBERS AND POLYMERS, vol.10, no.1, pp.46-52, 2009 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 10 Issue: 1
  • Publication Date: 2009
  • Doi Number: 10.1007/s12221-009-0046-4
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.46-52
  • Istanbul Technical University Affiliated: Yes


Electropolymerization of carbazole (Cz) by cyclic voltammetry (CV) onto carbon fiber microelectrodes (CFME) (diameter similar to 7 A mu m) in dichloromethane (CH(2)Cl(2)) solution of 0.1 mol center dot dm(-3) tetraethyl ammonium perchlorate (TEAP) results in the formation of polycarbazole (PCz) thin film coatings. CV results showed that these PCz thin films have reversible redox behavior in monomer-free electrolyte solution. The resulting thin polymer films were characterized using Fourier transform infrared attenuated total reflectance spectroscopy (FTIR-ATR) and atomic force microscopy (AFM). Results performed at optimum experimental conditions indicate that electrodes show a reversible and stable behavior over sixty eight days of testing for dopamine in 100 A mu mol center dot dm(-3) buffer solution. A detection limit for PCz thin films as low as 0.1 A mu M (3S/N) was obtained for the polycarbazole (PCz) thin films formed using CV. Hence, this novel sensor can be considered as promising sensor for dopamine detection.