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Gold Nanoparticles dotted Reduction Graphene Oxide Nanocomposite Based Electrochemical Aptasensor for Selective, Rapid, Sensitive and Congener-Specific PCB77 Detection

文献类型： 外文期刊

作者： Wu, Lidong 1 ; Lu, Xianbo 2 ; Fu, Xiaochen 1 ; Wu, Lingxia 2 ; Liu, Huan 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Control Qual & Safety Aquat Prod, Minisrty Agr, Beijing 100141, Peoples R China

2.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian 116023, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2017 年 7 卷

页码：

收录情况： SCI

摘要： Gold nanoparticles (AuNP) dotted reduction graphene oxide (RGO-AuNP) is used as a platform for an aptamer biosensor to selectively detect 3,3'4,4'-polychlorinated biphenyls (PCB77). By anchoring aptamers onto the binding sites of RGO-AuNP and making use of the synergy effect of RGO and AuNP, the RGO-AuNP based biosensor exhibits superior analytical performances to AuNP based biosensor in terms of sensitivity and repeatability. The sensitivity of RGO-AuNP based aptamers (RGO-AuNP-Ap) biosensor (226.8 mu A cm(-2)) is nearly two times higher than that of Au based biosensors (AuNP-Ap/Au electrode, 147.2 mu A cm(-2)). The RGO-AuNP-Ap/Au biosensor demonstrated a linear response for PCB77 concentrations between 1 pg L-1 and 10 mu g L-1, with a low limit of detection (LOD) of 0.1 pg L-1. The superb LOD satisfies the exposure thresholds (uncontaminated water < 0.1 ng L-1) set out by International Agency for Research on Cancer (IARC) and the Environmental Protection Agency (EPA). The proposed biosensor can be a powerful tool for rapid, sensitive and selective detection of PCBs on site.

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