Surface-functionalized MoS2 ultrathin nanosheets for electrochemical monitoring terminal deoxynucleotidyl transferase activity based on in-situ polymerized DNA
Surface-functionalized MoS2 ultrathin nanosheets for electrochemical monitoring terminal deoxynucleotidyl transferase activity based on in-situ polymerized DNA
复制标题
基于原位聚合 DNA 的表面功能化 MoS2 超薄纳米片用于电化学监测末端脱氧核苷酸转移酶活性
DOI:
10.1016/j.snb.2018.09.016
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发表时间:
2018-12
期刊:
影响因子:
--
通讯作者:
Song Wenbo
中科院分区:
文献类型:
--
作者:
Du Cuicui;Shang Anqi;Shang Mengxiang;Zhang Jinling;Song Wenbo
An efficient electrochemical biosensing strategy for terminal deoxynucleotidyl transferase (TdT) activity is developed based on thionin functionalized MoS2ultrathin nanosheets (Th/MoS2UTNS) and TdT-induced DNA polymerization. MoS2ultrathin nanosheets is firstly achieved via a facile pyrolytic approach assisted by g-C3N4sacrificial template. Followed by subsequent surface-functionalization with thionin, the Th/MoS2UTNS composite is obtained and designed as a sensing platform for TdT activity detection. In this approach, TdT catalyzes the polymerization of deoxyribonucleotides triphosphate (dNTP) substrate of 50% dATP-50% dTTP to the 3′-OH terminus of DNA primer and in-situ produces dsDNA consequently, which can be strongly immobilized onto thionin by intercalation and electrostatic interaction, resulting in a decreased redox signal of thionin. The proposed sensor exhibits a wide linear response for TdT in the range from 0.01 U to 2.44 U with a low detection limit of 0.0025 U. By elucidating an efficient biosensing platform on the basis of surface engineered MoS2ultrathin nanosheets, this work sheds light on the development of novel strategy for detecting other nucleic acid or protein analytes.
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影响因子:
12.6
作者:
Zhu Chengzhou;Du Dan;Lin Yuehe
通讯作者:
Lin Yuehe
影响因子:
12.6
作者:
K. Thenmozhi;S. Narayanan
通讯作者:
K. Thenmozhi;S. Narayanan
DOI:
10.1016/j.snb.2017.01.065
发表时间:
2017-06
期刊:
Sensors and Actuators B: Chemical
影响因子:
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作者:
Sun Huiping;Ma Shangxian;Li Yan;Qi Honglan
通讯作者:
Qi Honglan
影响因子:
7.4
作者:
Ju, Jian;Chen, Wei
通讯作者:
Chen, Wei
影响因子:
9.5
作者:
Leung, Ka-Ho;He, Bingyong;Ma, Dik-Lung
通讯作者:
Ma, Dik-Lung