期刊
ELECTROANALYSIS
卷 25, 期 11, 页码 2523-2529出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/elan.201300332
关键词
Molybdenum disulfide; Gold nanoparticles; Dopamine; Nanocomposites
资金
- National Basic Research Program of China [2012CB933301, 2009CB930600]
- National Natural Science Foundation of China [21204038, 81273409, 21305070]
- Ministry of Education of China [IRT1148, 20123223110007]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- State Key Laboratory of Bioelectronics, Southeast University
- State Key Laboratory of Coordination Chemistry, Nanjing University
Herein, a novel nanocomposite has been synthesized by molybdenum disulfide (MoS2) nanosheets and gold nanoparticles (AuNPs) via a microwave-assisted hydrothermal method, which possesses the specific features of both MoS2 and AuNPs. The AuNPs@MoS2 nanocomposite modified electrode exhibits excellent electrocatalytic activity toward dopamine (DA). Its oxidation peak current shows a linear dependence over the DA concentration in the range from 0.1 to 200 mu M, with a detection limit of 80nM (S/N=3). More importantly, the AuNPs@MoS2-based sensor can detect DA in the presence of a large excess of ascorbic acid. The AuNPs@MoS2-based sensor shows good sensitivity, reproducibility and selectivity, suggesting that the AuNPs@MoS2 nanocomposite is a promising candidate in electrochemical sensing and other electrocatalytic applications.
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