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Electrochemical sensing platform for L-CySH based on nearly uniform Au nanoparticles decorated graphene nanosheets.
Mater Sci Eng C Mater Biol Appl. 2014 May 01; 38:292-8.MS

Abstract

In this study, Au nanoparticles decorated graphene nanosheets were prepared using poly(vinylpyrrolidone) (PVP) covalently functionalized graphene oxide and chloroauric acid as template and Au precursor, respectively. Both the density and the size of Au nanoparticles deposited on the surface of graphene could be adjusted by the PVP grafting density. The graphene-Au hybrid nanosheets were then applied to fabricate a highly sensitive l-cysteine (L-CySH) electrochemical sensing platform. The cyclic voltammetry results showed that the modified glassy carbon electrode with graphene-Au hybrid nanosheets exhibited strong catalytic activity toward the electrooxidation of L-CySH. The current exhibited a widely linear response ranging from 0.1 to 24 μM with a low detection limit under the optimized conditions. The detection limit of L-CySH could reach as low as 20.5 nM (S/N=3). The enhanced electrochemical performance of the fabricated sensor was attributed to the combination of the excellent conductivity of graphene and strong catalytic property of uniform Au nanoparticles.

Authors+Show Affiliations

College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China.College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China; Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, Xiangtan University, Xiangtan 411105, Hunan Province, PR China; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, Xiangtan 411105, Hunan Province, PR China. Electronic address: gydx.1027@163.com.College of Chemistry, Xiangtan University, Xiangtan 411105, Hunan Province, PR China; Key Laboratory of Polymeric Materials & Application Technology of Hunan Province, Xiangtan University, Xiangtan 411105, Hunan Province, PR China; Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, Xiangtan 411105, Hunan Province, PR China; Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan 411105, Hunan Province, PR China. Electronic address: lihuaming@xtu.edu.cn.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24656381

Citation

Xu, Fugui, et al. "Electrochemical Sensing Platform for L-CySH Based On Nearly Uniform Au Nanoparticles Decorated Graphene Nanosheets." Materials Science & Engineering. C, Materials for Biological Applications, vol. 38, 2014, pp. 292-8.
Xu F, Wang F, Yang D, et al. Electrochemical sensing platform for L-CySH based on nearly uniform Au nanoparticles decorated graphene nanosheets. Mater Sci Eng C Mater Biol Appl. 2014;38:292-8.
Xu, F., Wang, F., Yang, D., Gao, Y., & Li, H. (2014). Electrochemical sensing platform for L-CySH based on nearly uniform Au nanoparticles decorated graphene nanosheets. Materials Science & Engineering. C, Materials for Biological Applications, 38, 292-8. https://doi.org/10.1016/j.msec.2014.02.017
Xu F, et al. Electrochemical Sensing Platform for L-CySH Based On Nearly Uniform Au Nanoparticles Decorated Graphene Nanosheets. Mater Sci Eng C Mater Biol Appl. 2014 May 1;38:292-8. PubMed PMID: 24656381.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Electrochemical sensing platform for L-CySH based on nearly uniform Au nanoparticles decorated graphene nanosheets. AU - Xu,Fugui, AU - Wang,Fan, AU - Yang,Duanguang, AU - Gao,Yong, AU - Li,Huaming, Y1 - 2014/02/20/ PY - 2013/10/23/received PY - 2013/12/23/revised PY - 2014/02/13/accepted PY - 2014/3/25/entrez PY - 2014/3/25/pubmed PY - 2014/12/15/medline KW - Au nanoparticles KW - Grafting KW - Graphene KW - Modified electrode KW - l-Cysteine SP - 292 EP - 8 JF - Materials science & engineering. C, Materials for biological applications JO - Mater Sci Eng C Mater Biol Appl VL - 38 N2 - In this study, Au nanoparticles decorated graphene nanosheets were prepared using poly(vinylpyrrolidone) (PVP) covalently functionalized graphene oxide and chloroauric acid as template and Au precursor, respectively. Both the density and the size of Au nanoparticles deposited on the surface of graphene could be adjusted by the PVP grafting density. The graphene-Au hybrid nanosheets were then applied to fabricate a highly sensitive l-cysteine (L-CySH) electrochemical sensing platform. The cyclic voltammetry results showed that the modified glassy carbon electrode with graphene-Au hybrid nanosheets exhibited strong catalytic activity toward the electrooxidation of L-CySH. The current exhibited a widely linear response ranging from 0.1 to 24 μM with a low detection limit under the optimized conditions. The detection limit of L-CySH could reach as low as 20.5 nM (S/N=3). The enhanced electrochemical performance of the fabricated sensor was attributed to the combination of the excellent conductivity of graphene and strong catalytic property of uniform Au nanoparticles. SN - 1873-0191 UR - https://www.unboundmedicine.com/medline/citation/24656381/Electrochemical_sensing_platform_for_L_CySH_based_on_nearly_uniform_Au_nanoparticles_decorated_graphene_nanosheets_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0928-4931(14)00094-0 DB - PRIME DP - Unbound Medicine ER -