Highly Sensitive and Selective Determination of Dopamine in the Presence of Ascorbic Acid Using Gold Nanoparticles‐Decorated MoS2 Nanosheets Modified Electrode. Issue 11 (9th October 2013)

• Record Type: Journal Article
• Authors: Su, Shao; Sun, Haofan; Xu, Fei; Yuwen, Lihui; Wang, Lianhui
• Is Part Of: Electroanalysis. Volume 25:Issue 11(2013:Nov.)
• Page Start: 2523
• Page End: 2529
• Publication Date: 2013-10-09
• Subjects: Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201300332
• Languages: English
• ISSNs: 1040-0397

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 (<italic>S</italic>/<italic>N</italic>=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.</p> </abstract>