Electrocatalytic response of dopamine at a thiolactic acid self-assembled gold electrode

被引：58

作者：

Wang, Q ^{[1
]}

Jiang, N ^{[1
]}

Li, NQ ^{[1
]}

机构：

[1] Peking Univ, Dept Chem, Beijing 100871, Peoples R China

来源：

MICROCHEMICAL JOURNAL | 2001年 / 68卷 / 01期

基金：

中国国家自然科学基金;

关键词：

electrocatalysis; dopamine; self-assembled electrode; cyclic voltammetry; X-ray photoelectron spectroscopy;

D O I：

10.1016/S0026-265X(00)00178-8

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The thiolactic acid (TLA) self-assembled monolayer modified gold electrode (TLA/Au) is demonstrated to catalyze the electrochemical response of dopamine (DA) by cyclic voltammetry. A pair of well-defined redox waves were obtained and the calculated standard rate constant (ks) is 0.525 cm/s at the sell-assembled electrode. The electrode reaction is a reversible process. The oxidation peak of DA can be used to determine the concentration of DA. The peak current and the concentration of DA have a linear relationship in the range of 4.0 x 10(-5)-8.0 x 10(-4) mol/l. The detection limit is 3.0 x 10(-6) mol/l. The TLA-SAM was characterized with X-ray photoelectron spectroscopy (XPS) and a contact angle goniometer. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：77 / 85

页数：9

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