Sensitivity enhancement of the carbon fibre microelectrode modified by LB layers of polythiophene to trace metals in aqueous solutions

The detection of trace metals in aqueous solutions is of great importance in relation to the environmental protection. A significant sensitivity enhancement in the double-step voltcoulometry was reached by using a chemically modified carbon fibre microelectrode. The sensitivity to the method used for cleaning of the microelectrode surface before being coated by the Langmuir-Blodgett polythiophene film was demonstrated. The changes in kinetics of redox reactions, taking place on the microelectrode surface, were described (Authors)