Highly Sensitive and Selective Determination of Dopamine in the Presence of Ascorbic Acid Using Gold Nanoparticles-Decorated MoS2 Nanosheets Modified Electrode

作者：Su Shao; Sun Haofan; Xu Fei; Yuwen Lihui^*; Wang Lianhui

来源：Electroanalysis, 2013, 25(11): 2523-2529.

DOI：10.1002/elan.201300332

• Molybdenum disulfide
• Gold nanoparticles
• Dopamine
• Nanocomposites

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.

• 出版日期2013-11
• 单位南京大学