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- Title
Highly Sensitive and Selective Determination of Dopamine in the Presence of Ascorbic Acid Using Gold Nanoparticles-Decorated MoS<sub>2</sub> Nanosheets Modified Electrode.
- Authors
Su, Shao; Sun, Haofan; Xu, Fei; Yuwen, Lihui; Wang, Lianhui
- Abstract
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 µM, with a detection limit of 80 nM ( 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.
- Subjects
GOLD nanoparticles; DOPAMINE; VITAMIN C; NANOCOMPOSITE materials; OXIDATION
- Publication
Electroanalysis, 2013, Vol 25, Issue 11, p2523
- ISSN
1040-0397
- Publication type
Article
- DOI
10.1002/elan.201300332