Study of the adsorption of cytochrome c on a gold nanoparticle - modified gold electrode by using cyclic voltammetry, electrochemical impedance spectroscopy and chronopotentiometry

被引：23
|
作者：
Ding, Xiaoqin
Yang, Meng
Hu, Jingbo [1 ]
Li, Qilong
McDougall, Angus
机构：
[1] Beijing Normal Univ, Dept Chem, Beijing 100875, Peoples R China
[2] Univ Manchester, Sch Chem Engn & Analyt Sci, Manchester M60 1QD, Lancs, England
来源：
MICROCHIMICA ACTA | 2007年 / 158卷 / 1-2期
关键词：
cytochrome c; gold electrode; gold nanoparticle; adsorption; electrochemical impedance spectroscopy; cyclic voltammetry; chronopotentiometry;
D O I：
10.1007/s00604-006-0683-x
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Adsorption of cytochrome c (Cyt c) on a gold nanoparticle - modified gold electrode was studied by using cyclic voltammetry, electrochemical impedance spectroscopy and chronopotentiometry in a phosphate buffer solution. It is shown that the charge transfer resistance is directly proportional to the amount of adsorbed Cyt c. The effects of temperature and time on the course of adsorption were also studied. The trends obtained in Delta G(ADS) showed that Cyt c was found to have a smaller affinity for the modified electrode as indicated by their smaller negative Delta G(ADS) values.
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页码：65 / 71
页数：7
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