Dopamine amperometric detection at a ferrocene clicked PEDOT:PSS coated electrode

Autor: Beatrice Fraboni, Monia Demelas, Erika Scavetta, Sonia Lucia Fiorilli, Marco Marzocchi, Annalisa Bonfiglio, Federica Mariani, Rita Mazzoni, Riccardo G. Margutta
Přispěvatelé: E. Scavetta, R. Mazzoni, F. Mariani, R. G. Margutta, A. Bonfiglio, M. Demela, S. Fiorilli, M. Marzocchi, B. Fraboni
Rok vydání: 2014
Předmět:
Zdroj: J. Mater. Chem. B. 2:2861-2867
ISSN: 2050-7518
2050-750X
DOI: 10.1039/c4tb00169a
Popis: Chemically modified electrodes are widely employed in electroanalytical chemistry and an important goal is to strongly anchor redox mediators on the electrode surface. In this work, indium tin oxide (ITO) electrodes have been coated with PEDOT:PSS that has been ferrocene-functionalized, by a two-step procedure consisting of the electrodeposition of PEDOT-N3 followed by copper-catalyzed azide–alkyne cycloaddition of ethynylferrocene. The coated electrodes have been characterized by XPS, showing successful ferrocene immobilization, by AFM, and by cyclic voltammetry (CV), which is dominated by the stable and highly reversible response of ferrocene. The electrocatalytical performance of the device is assessed by analyzing 3,4-dihydroxyphenyl ethylamine, also commonly known as dopamine (DA). The sensor presents a linear range between 0.01 and 0.9 mM, a mean sensitivity of 196 mA M−1 cm−2 and a limit of detection (LoD) of 1 µM.
Databáze: OpenAIRE