Abstract
Gold nanoparticles were in-situ decorated on top of a polyaniline film (GNPs–PANI) via the direct electroreduction of the adsorbed AuCl -4 ions on a glassy carbon electrode that previously was coated with PANI by electropolymerization. The GNPs–PANI composite and the performance of the resultant sensors were investigated in some detail. The sensor was applied to the oxidation of dopamine (DA) with improved catalytic activity. Its catalytic current showed wide linear response toward dopamine ranging from 3 to 115 μM, with a low detection limit of 0.8 μM (S/N=3). In addition, the sensor exhibits easy-operation, fast response to dopamine, as well as excellent reproducibility and stability.
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Gold nanoparticles decorated polyaniline (GNPs-PANI) was prepared via electrosynthesis. The GNPs-PANI composite showed good catalytic activity toward the oxidation of dopamine.
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This work was financially supported by the Nation Natural Science foundation of China (Nos. 20805011, 20905021).
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Wang, AJ., Feng, JJ., Li, YF. et al. In-situ decorated gold nanoparticles on polyaniline with enhanced electrocatalysis toward dopamine. Microchim Acta 171, 431–436 (2010). https://doi.org/10.1007/s00604-010-0452-8
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DOI: https://doi.org/10.1007/s00604-010-0452-8