Selective determination of dopamine on a boron-doped diamond electrode modified with gold nanoparticle/polyelectrolyte-coated polystyrene colloids

Min Wei; Li Guo Sun; Zhuo Ying Xie; Jin Fang Zhii; Akira Fujishima; Yasuaki Einaga; De Gang Fu; Xue Mei Wang; Zhong Ze Gu

doi:10.1002/adfm.200701099

Selective determination of dopamine on a boron-doped diamond electrode modified with gold nanoparticle/polyelectrolyte-coated polystyrene colloids

Min Wei, Li Guo Sun, Zhuo Ying Xie, Jin Fang Zhii, Akira Fujishima, Yasuaki Einaga, De Gang Fu, Xue Mei Wang, Zhong Ze Gu

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

70 Citations (Scopus)

Abstract

Negatively charged gold nanoparticles (AuNPs) and a polyelectrolyte (PE) have been assembled alternately on a polystyrene (PS) colloid by a layer-by-layer (LBL) self-assembly technique to form three-dimensional (Au/PAH)₄/(PSS/PAH)₄ multilayer-coated PS spheres (Au/PE/PS multilayer spheres). The Au/PE/PS multilayer spheres have been used to modify a boron-doped diamond (BDD) electrode. Cyclic voltammetry is utilized to investigate the properties of the modified electrode in a 1.0M KCl solution that contains 5.0 × 10^-3 M K₃Fe(CN)₆, and the result shows a dramatically decreased redox activity compared with the bare BDD electrode. The electrochemical behaviors of dopamine (DA) and ascorbic acid (AA) on the bare and modified BDD electrode are studied. The cyclic voltammetric studies indicate that the negatively charged, three-dimensional Au/PE/PS multilayer sphere-modified electrodes show high electrocatalytic activity and promote the oxidation of DA, whereas they inhibit the electrochemical reaction of AA, and can effectively be used to determine DA in the presence of AA with good selectivity. The detection limit of DA is 0.8 × 10^-6M in a linear range from 5 × 10^-6 to 100 × 10^-6M in the presence of 1×10^-3M AA.

Original language	English
Pages (from-to)	1414-1421
Number of pages	8
Journal	Advanced Functional Materials
Volume	18
Issue number	9
DOIs	https://doi.org/10.1002/adfm.200701099
Publication status	Published - 2008 May 9

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

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title = "Selective determination of dopamine on a boron-doped diamond electrode modified with gold nanoparticle/polyelectrolyte-coated polystyrene colloids",

abstract = "Negatively charged gold nanoparticles (AuNPs) and a polyelectrolyte (PE) have been assembled alternately on a polystyrene (PS) colloid by a layer-by-layer (LBL) self-assembly technique to form three-dimensional (Au/PAH)4/(PSS/PAH)4 multilayer-coated PS spheres (Au/PE/PS multilayer spheres). The Au/PE/PS multilayer spheres have been used to modify a boron-doped diamond (BDD) electrode. Cyclic voltammetry is utilized to investigate the properties of the modified electrode in a 1.0M KCl solution that contains 5.0 × 10-3 M K3Fe(CN)6, and the result shows a dramatically decreased redox activity compared with the bare BDD electrode. The electrochemical behaviors of dopamine (DA) and ascorbic acid (AA) on the bare and modified BDD electrode are studied. The cyclic voltammetric studies indicate that the negatively charged, three-dimensional Au/PE/PS multilayer sphere-modified electrodes show high electrocatalytic activity and promote the oxidation of DA, whereas they inhibit the electrochemical reaction of AA, and can effectively be used to determine DA in the presence of AA with good selectivity. The detection limit of DA is 0.8 × 10-6M in a linear range from 5 × 10-6 to 100 × 10-6M in the presence of 1×10-3M AA.",

author = "Min Wei and Sun, {Li Guo} and Xie, {Zhuo Ying} and Zhii, {Jin Fang} and Akira Fujishima and Yasuaki Einaga and Fu, {De Gang} and Wang, {Xue Mei} and Gu, {Zhong Ze}",

year = "2008",

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T1 - Selective determination of dopamine on a boron-doped diamond electrode modified with gold nanoparticle/polyelectrolyte-coated polystyrene colloids

AU - Wei, Min

AU - Sun, Li Guo

AU - Xie, Zhuo Ying

AU - Zhii, Jin Fang

AU - Fujishima, Akira

AU - Einaga, Yasuaki

AU - Fu, De Gang

AU - Wang, Xue Mei

AU - Gu, Zhong Ze

PY - 2008/5/9

Y1 - 2008/5/9

N2 - Negatively charged gold nanoparticles (AuNPs) and a polyelectrolyte (PE) have been assembled alternately on a polystyrene (PS) colloid by a layer-by-layer (LBL) self-assembly technique to form three-dimensional (Au/PAH)4/(PSS/PAH)4 multilayer-coated PS spheres (Au/PE/PS multilayer spheres). The Au/PE/PS multilayer spheres have been used to modify a boron-doped diamond (BDD) electrode. Cyclic voltammetry is utilized to investigate the properties of the modified electrode in a 1.0M KCl solution that contains 5.0 × 10-3 M K3Fe(CN)6, and the result shows a dramatically decreased redox activity compared with the bare BDD electrode. The electrochemical behaviors of dopamine (DA) and ascorbic acid (AA) on the bare and modified BDD electrode are studied. The cyclic voltammetric studies indicate that the negatively charged, three-dimensional Au/PE/PS multilayer sphere-modified electrodes show high electrocatalytic activity and promote the oxidation of DA, whereas they inhibit the electrochemical reaction of AA, and can effectively be used to determine DA in the presence of AA with good selectivity. The detection limit of DA is 0.8 × 10-6M in a linear range from 5 × 10-6 to 100 × 10-6M in the presence of 1×10-3M AA.

AB - Negatively charged gold nanoparticles (AuNPs) and a polyelectrolyte (PE) have been assembled alternately on a polystyrene (PS) colloid by a layer-by-layer (LBL) self-assembly technique to form three-dimensional (Au/PAH)4/(PSS/PAH)4 multilayer-coated PS spheres (Au/PE/PS multilayer spheres). The Au/PE/PS multilayer spheres have been used to modify a boron-doped diamond (BDD) electrode. Cyclic voltammetry is utilized to investigate the properties of the modified electrode in a 1.0M KCl solution that contains 5.0 × 10-3 M K3Fe(CN)6, and the result shows a dramatically decreased redox activity compared with the bare BDD electrode. The electrochemical behaviors of dopamine (DA) and ascorbic acid (AA) on the bare and modified BDD electrode are studied. The cyclic voltammetric studies indicate that the negatively charged, three-dimensional Au/PE/PS multilayer sphere-modified electrodes show high electrocatalytic activity and promote the oxidation of DA, whereas they inhibit the electrochemical reaction of AA, and can effectively be used to determine DA in the presence of AA with good selectivity. The detection limit of DA is 0.8 × 10-6M in a linear range from 5 × 10-6 to 100 × 10-6M in the presence of 1×10-3M AA.

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Selective determination of dopamine on a boron-doped diamond electrode modified with gold nanoparticle/polyelectrolyte-coated polystyrene colloids

Abstract

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