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Sensors 2018, 18(3), 846; https://doi.org/10.3390/s18030846

Modifications of Au Nanoparticle-Functionalized Graphene for Sensitive Detection of Sulfanilamide

School of Food Science and Technology, Henan Key Laboratory of Cereal and Oil Food Safety Inspection and Control, Henan University of Technology, Zhengzhou 450001, China
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Received: 6 February 2018 / Revised: 10 March 2018 / Accepted: 10 March 2018 / Published: 13 March 2018
(This article belongs to the Special Issue Graphene Based Sensors and Electronics)
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Abstract

In this paper, we present a simple and feasible electrochemical sensor based on Au nanoparticle-functionalized graphene for the determination of sulfanilamide. Au nanoparticles were deposited on graphene, which acted as a platform to prepare excellent nanocomposites. Attributed to the graphene’s large surface area and the Au nanoparticles’ strong conductivity, many sulfanilamide molecules were enriched on the sensor surface and the signal response became more sensitive. Under the optimal conditions, the electrochemical sensors could be used for the efficient detection of sulfanilamide. Good linearity was observed in the range of 0.1–1000 μmol·L−1 and the detection limit was 0.011 μmol·L−1. Most importantly, the Au nanoparticle-functionalized graphene-modified electrode could be successfully applied for the detection of sulfanilamide in animal meat, and exhibited good stability, acceptable recovery, and offered a promising platform for point-of-care detecting in real samples. View Full-Text
Keywords: electrochemical sensor; Au nanoparticles; graphene; sulfanilamide electrochemical sensor; Au nanoparticles; graphene; sulfanilamide
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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He, B.-S.; Yan, X.-H. Modifications of Au Nanoparticle-Functionalized Graphene for Sensitive Detection of Sulfanilamide. Sensors 2018, 18, 846.

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