☆ 4.7 Article

Electrochemical behavior of dopamine and ascorbic acid at dendritic Au rod surfaces: Selective detection of dopamine in the presence of high concentration of ascorbic acid

JOURNAL OF ELECTROANALYTICAL CHEMISTRY (2012)

期刊

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

卷 683, 期 -, 页码 75-79

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ELSEVIER SCIENCE SA

DOI: 10.1016/j.jelechem.2012.08.012

关键词

Dendritic Au rod; Dopamine; Ascorbic acid; Differential pulse voltammetry

类别

Chemistry, Analytical Electrochemistry

资金

Basic Science Research Program through the National Research Foundation of Korea (NRF)
Ministry of Education, Science and Technology [2010-0004126]
Ministry of Education, Science Technology (MEST)
National Research Foundation of Korea (NRF) through the Human Resource Training Project for Regional Innovation
National Research Foundation of Korea [2010-0004126] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)

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摘要

Electrochemical behavior of dopamine (DA) and ascorbic acid (AA) at dendritic Au rod (DAR) surfaces prepared by a simple and fast electrodeposition from sulfite-based Au(I) electrolytes was investigated. The unique DAR structures with sharp edge Au sites differentiated the anodic waves between DA and AA, and the electrooxidation of DA at DAR surfaces was significantly enhanced at lower DA concentration ranges. The DAR surfaces enabled the differential pulse voltammetric determination of DA in the presence of 0.1 mM of AA, and the modification of the DAR with Nafion layer; enhanced the sensitivity and selectivity against AA. Electrochemical deposition would offer an efficient route for fabricating nanostructured surfaces for electrochemical determination of biologically important species. (C) 2012 Elsevier B.V. All rights reserved.

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