A Novel Aptasensor Based on Graphene/Graphite Carbon Nitride Nanocomposites for Cadmium Detection with High Selectivity and Sensitivity

文献类型： 外文期刊

第一作者： Wang, Xiaofang

作者： Wang, Xiaofang;Gao, Wenyu;Yan, Wei;Li, Pei;Zou, Haihan;Wei, Zhengxuan;Wu, Songmei;Yu, Yu;Ding, Kejian;Guan, Weijun;Ma, Yuehui

作者机构：

关键词： graphite carbon nitride; reduced graphene oxide; aptamer sensor; cadmium; DPASV

期刊名称：ACS APPLIED NANO MATERIALS （ 影响因子：5.097； 五年影响因子：5.1 ）

ISSN： 2574-0970

年卷期： 2018 年 1 卷 5 期

页码：

收录情况： SCI

摘要： Aptamers as new modes of detection have strong affinity and specificity for targets. A novel sensor was developed by constructing a composite system of specific aptamers and reduced graphene oxide (rGO)/graphitic carbon nitride (g-C3N4) (GCN) for detecting the cadmium cation. Attributed to the incorporation of rGO and aptamers with designed terminal groups as well as the delicate bonding of aptamers with g-C3N4, this electrochemical biosensor exhibited good sensitivity, specificity, reproducibility, and stability for Cd2+ detection. The linear calibration curves range from 1 nM to 1 mu M and from 1 mu M to 1 mM, and the limit of detection (LOD) was calculated to be 0.337 nM. The practical application of the proposed method was also verified in the real sample.

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