Chitosan/graphene oxide/MoS2/AuNPs modified electrochemical sensor for trace mercury detection

被引：5
作者：
Wang, Ri [1 ,2 ]
Xiong, Chenyu [1 ,2 ]
Xie, Yong [1 ,2 ]
Han, Mingjie [1 ,2 ]
Xu, Yuhao [1 ,2 ]
Bian, Chao [1 ,2 ]
Xia, Shanhong [1 ,2 ]
机构：
[1] Chinese Acad Sci, Aerosp Informat Res Inst, State Key Lab Transducer Technol, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Sch Elect Elect & Commun Engn, Beijing 100190, Peoples R China
来源：
2021 IEEE 16TH INTERNATIONAL CONFERENCE ON NANO/MICRO ENGINEERED AND MOLECULAR SYSTEMS (NEMS) | 2021年
关键词：
molybdenum disulfide; thymine-Hg2+-thymine; electrochemical sensor; trace mercury detection;
D O I：
10.1109/NEMS51815.2021.9451224
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
This study reports a novel electrochemical sensor to detect trace mercury based on an electrode coated by chitosan/graphene oxide/MoS2/AuNPs and thymine-Hg2+-thymine base pair. This method effectively utilizes the biocompatibility of molybdenum disulfide to DNA and constructs a detection platform for mercury ions. The electrocatalytic activity of MoS2 and the specific binding of thymine-Hg2+-thymine base pair significantly reduce the detection limit of mercury and improve the sensitivity of the electrode. When there exists Hg2+, the voltammetric current signal of redox peak decreases after the interaction between mercury and DNA. The sensor showed good linearity from 0.01 mu g/L to 4 mu g/L with a correlation coefficient of 0.991 and the limit of detection was found to be 5.8ng/L. This simple, sensitive, low cost and easy preparation electrochemical sensor has the potential application in trace mercury detection.
引用
收藏
页码：1303 / 1307
页数：5
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