Ion selectivity of a poly(3-pentylmethoxythiophene) LB-layer modified carbon-fiber microelectrode as a consequence of the second order filtering in voltcoulometry.
Ion selective properties of poly(3-pentylmethoxythiophene) Langmuir-Blodgett film modified carbon-fiber microelectrode are described. The study of the electrode behavior indicates that important features occur if two electrochemical methods, one of them being kinetics sensitive, are used. While in case of the typical steady-state voltammetry the electrode remains sensitive to both the cations and anions, the kinetics-sensitive properties of voltcoulometry based on the second-order filtering scheme disable the observation of anions. As a model system a mixture of copper and dopamine ions is used.
Gmucová
Katarína
K
Institute of Physics, Slovak Academy of Sciences, SK-845 11 Bratislava, Slovak Republic. gmucova@savba.sk
Weis
Martin
M
Barancok
Drahoslav
D
Cirák
Július
J
Tomcík
Pavol
P
Pavlásek
Juraj
J
D002244:Carbon; D020099:Coated Materials, Biocompatible; D004563:Electrochemistry; D008839:Microelectrodes; D011108:Polymers / Q000737:chemistry*; D013876:Thiophenes / Q000737:chemistry*
D020099:Coated Materials, Biocompatible; D011108:Polymers; D013876:Thiophenes; D002244:Carbon