Label-free electrochemical biosensor for ultra-low level detection of Ag(I) using ssDNA functionalized multi-walled carbon nanotube

被引：8

作者：

Pal, Chittatosh ^{[1
]}

Majumder, Subrata ^{[1
]}

机构：

[1] Natl Inst Technol, Patna 800005, India

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2022年 / 645卷

关键词：

Silver; Biosensor; Picomolar; DNA; MWNT; Cyclic voltammetry; CYTOSINE-CYTOSINE PAIRS; SILVER IONS; VISUAL DETECTION; ENDS; ELECTRODES; GRAPHITE; DOTS;

D O I：

10.1016/j.colsurfa.2022.128927

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Prolonged exposure to silver(I) could harm both human health and the environment. This paper proposes the fabrication of a sensitive, selective, and facile electrochemical biosensor based on non-covalent ssDNA-MWNT hybridization to detect the Ag+ ions in an aqueous medium. Exploration by cyclic voltammetry revealed selective detection of Ag+ metal ions by exploiting Cytosine-Cytosine mismatch chemistry to form specific Cytosine-Ag(I)Cytosine complexes. The biosensor recorded the lowest 1 pM silver ion concentration in the aqueous medium, and real sample studies further proved its potential for trace amount determination in the aqueous medium for environmental monitoring purposes.

引用

页数：6

共 42 条

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