A novel one-step electrochemical codeposition of carbon nanotubes-DNA hybrids and tiron doped polypyrrole for selective and sensitive determination of dopamine

被引：21

作者：

Li, Jing ^{[1
]}

Wei, Wanzhi ^{[1
]}

Luo, Shenglian ^{[1
]}

机构：

[1] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China

来源：

MICROCHIMICA ACTA | 2010年 / 171卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

Carbon nanotubes-DNA hybrids; Tiron; Polypyrrole; Electrocodeposition; Dopamine; ASCORBIC-ACID; ELECTRODE; IMMOBILIZATION; COMPOSITE;

D O I：

10.1007/s00604-010-0412-3

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We describe a novel sensor for dopamine. It is based on the use of polypyrrole doped with a carbon nanotube-DNA hybrid. The composite material can be used as a matrix for immobilizing doping anions such as tiron which assist in electrostatic repulsion of anions such as ascorbate and others. The sensor was used for highly selective and sensitive determination of dopamine. Parameters affecting the response were optimized. The sensor displays a wide dynamic range, a detection limit as low as 0.5 pM, high stability, and good reproducibility.

引用

页码：109 / 116

页数：8

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