Polycarbazole modified carbon fiber microelectrode: Surface characterization and dopamine sensor


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

FIBERS AND POLYMERS, cilt.10, ss.46-52, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 10 Konu: 1
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1007/s12221-009-0046-4
  • Dergi Adı: FIBERS AND POLYMERS
  • Sayfa Sayıları: ss.46-52

Özet

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.