期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 173, 期 7, 页码 1717-1726出版社
SPRINGER
DOI: 10.1007/s12010-014-0959-2
关键词
Graphene; Multiwall carbon nanotubes; Gold nanoclusters; Ascorbic acid; Dopamine; Uric acid
资金
- National Natural Science Foundation of China [21075100, 21275119]
- Municipal Key Laboratory on Luminescence and Real-Time Analysis, Southwest University
- Fundamental Research Funds for the Central Universities [XDJK2012A004]
In this paper, graphene-multiwall carbon nanotube-gold nanocluster (GP-MWCNT-AuNC) composites were synthesized and used as modifier to fabricate a sensor for simultaneous detection of ascorbic acid (AA), dopamine (DA), and uric acid (UA). The electrochemical behavior of the sensor was investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and differential pulse voltammetry (DPV) techniques. The combination of GP, MWCNTs, and AuNCs endowed the electrode with a large surface area, good catalytic activity, and high selectivity and sensitivity. The linear response range for simultaneous detection of AA, DA, and UA at the sensor were 120-1,701, 2-213, and 0.7-88.3 mu M, correspondingly, and the detection limits were 40, 0.67, and 0.23 mu M (S/N = 3), respectively. The proposed method offers a promise for simple, rapid, selective, and cost-effective analysis of small biomolecules.
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