期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 235, 期 -, 页码 507-514出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2016.05.111
关键词
Wireless magnetoelastic sensor; Mercury(II) specific aptamer probe; Graphene oxide; Streptavidin; Gold nanoparticles
资金
- National Natural Science Foundation of China [21177052, 81502850]
- Natural Science Foundation of Hunan Province in China [2015JJ2122]
A novel wireless magnetoelastic sensor (WMS) strategy for Hg2+ assay was proposed using a specific aptamer probe and graphene oxide (GO) as an adsorbent. The introduction of Hg2+ results in the release of CDNA-biotin. This one can be adsorbed to the surface of GO that was immobilized on the WMS along with a decrease of the resonance frequency of the sensor. A biotin-streptavidin (SA)-gold nanoparticles( AuNPs) system designed in this work was used for amplifying response signal of the sensor. The signal intensity linearly correlated with Hg2+ concentration ranging from 2.80 to 88.9 nM with a detection limit of 0.885 nM. This WMS has additional advantages of being less time-consuming, low cost and remote query, and can be employed for the real-time and in situ detection of Hg2+ in real samples. The mechanism for structure switching and signal amplification was also studied by transmission electron microscopy and UV-vis spectra. (C) 2016 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