期刊
ANALYTICA CHIMICA ACTA
卷 715, 期 -, 页码 99-104出版社
ELSEVIER
DOI: 10.1016/j.aca.2011.12.011
关键词
Seed-mediated growth; Copper nanoparticles; Carbon nanotubes; Biosensor; Glucose; Electrocatalytic oxidation
资金
- National Natural Science Foundation of China [J0830415, 20975034]
- 973 National Key Basic Research Program of China [2007CB310500]
- Program for Changjiang Scholars and Innovative Research Team in University
- Ministry of Education of China [NCET-07-0272]
In this paper, for the first time, Cu nanoparticles (CuNPs) were prepared by seed-mediated growth method with Au nanoparticles (AuNPs) playing the role of seeds. Carbon nanotubes (CNTs) and AuNPs were first dropped on the surface of glassy carbon (GC) electrode, and then the electrode was immersed into growth solution that contained CuSO4 and hydrazine. CuNPs were successfully grown on the surface of the CNTs. The modified electrode showed a very high electrochemical activity for electrocatalytic oxidation of glucose in alkaline medium, which was utilized as the basis of the fabrication of a nonenzymatic biosensor for electrochemical detection of glucose. The biosensor can be applied to the quantification of glucose with a linear range covering from 1.0 x 10(-7) to 5 x 10(-3) M and a low detection limit of 3 x 10(-8) M. Furthermore, the experiment results also showed that the biosensor exhibited good reproducibility and long-term stability, as well as high selectivity with no interference from other oxidable species. (C) 2011 Elsevier B.V. All rights reserved.
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