A glassy carbon electrode with electrodeposited silver nanoparticles for aptamer based voltammetric determination of trinitrotoluene using riboflavin as a redox probe

被引：28
作者：
Roushani, Mahmoud [1 ]
Shahdost-fard, Faezeh [1 ]
机构：
[1] Ilam Univ, Dept Chem, POB 69315-516, Ilam, Iran
来源：
MICROCHIMICA ACTA | 2018年 / 185卷 / 12期
关键词：
TNT; Aptasensor; AgNPs; Electrodeposition; Aptasensig assay; ELECTROCHEMICAL REDUCTION; GOLD-NANOPARTICLES; GRAPHENE OXIDE; TNT DETECTION; APTASENSOR; OXIDATION; LABEL; ELECTROCHEMILUMINESCENCE; 2,4,6-TRINITROTOLUENE; NANOCOMPOSITES;
D O I：
10.1007/s00604-018-3098-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
An electrochemical nanoaptasensor is described that is based on the use of a glassy carbon electrode (GCE) modified with electrodeposited silver nanoparticles (AgNPs). An aptamer (Apt) against trinitrotoluene (TNT) was then immobilized on the AgNPs. The addition of TNT to the modified GCE leads to decrease in peak current (typically measured at a potential of -0.45V vs. Ag/AgCl) of riboflavin which acts as an electrochemical probe. Even small changes in the surface (as induced by binding of Apt to TNT) alter the interfacial properties. As a result, the LOD is lowered to 33 aM, and the dynamic range extends from 0.1 fM to 10M without sacrificing specificity.
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页数：8
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