期刊
BIOSENSORS & BIOELECTRONICS
卷 70, 期 -, 页码 122-129出版社
ELSEVIER ADVANCED TECHNOLOGY
DOI: 10.1016/j.bios.2015.03.028
关键词
Impedimetric aptasensor; Gold nanoparticle; Graphene oxide nanoribbon; Acetamiprid
类别
资金
- National Natural Science Foundation of China [21175061, 21305052, 21375050, 21405063]
- Key Laboratory of Modern Agriculture Equipment and Technology [NZ201109]
- Priority Academic Program Development of Jiangsu Higher Education Institutions [PAPD-2014-37]
Gold nanoparticles (Au NPs) decorated multiwalled carbon nanotube-reduced graphene oxide nanoribbon (Au/MWCNT-rGONR) composites were synthesized by a one-pot reaction. By employing the resulting Au/MWCNT-rGONR composites as the support for aptamer immobilization, we developed an ultrasensitive label-free electrochemical impedimetric aptasensor for acetamiprid detection, which was based on that the variation of electron transfer resistance was relevant to the formation of acetamiprid-aptamer complex at the modified electrode surface. Compared with pure Au NPs and MWCNT-rGONR, the Au/MWCNT-rGONR composites modified electrode was the most sensitive aptasensing platform for the determination of acetamiprid. The proposed aptasensor displayed a linear response for acetamiprid in the range from 5 x 10(-14) M to 1 x 10(-5) M with an extremely low detection limit of 1.7 x 10(-14) M (S/N=3). In addition, this impedimetric aptasensor possessed great advantages including the simple operation process, low-cost, selectivity and sensitivity, which provided a promising model for the aptamer-based detection with a direct impedimetric method. (C) 2015 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据