Improved detection of Hg2+ in aqueous solution with high sensitivity and selectivity by using mercury-specific DNA, Sybr Green I and gold nanoparticles

被引：0
作者：
Xu, Hui [1 ]
Gao, Shuli [1 ]
Chen, Jiannong [2 ]
Liu, Quanwen [1 ]
机构：
[1] Ludong Univ, Sch Chem & Mat Sci, Yantai 264025, Peoples R China
[2] Ludong Univ, Dept Phys, Yantai 264025, Peoples R China
来源：
ADVANCED MATERIALS, PTS 1-4 | 2011年 / 239-242卷
关键词：
Sybr Green I; Hg2+; K+; Gold nanoparticle; ANODIC-STRIPPING VOLTAMMETRY; PLASMA-MASS SPECTROMETRY; TURN-ON; COLORIMETRIC DETECTION; CONJUGATED POLYMERS; ENERGY-TRANSFER; SOIL SAMPLES; FLUORESCENCE; ION; MOLECULES;
D O I：
10.4028/www.scientific.net/AMR.239-242.934
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
We report a label-free, fast, fluorescence turn on assay for Hg2+ detecton by using mercury-specific DNA (MSD), Sybr Green I (SG) and gold nanoparticles (AuNPs). SG efficiently discriminates MSD and MSD/Hg2+ complex. The addition of gold nanoparticle decreases the background fluorescence signal further for MSD. The fluorescence intensity of MSD/Hg2+ complex keeps constant after addition of AuNPs. This property improves the signal-to-background ratio and decreases the detection limitation further. In addition, the method shows improved selectivity compared with that in the absence of AuNPs. This strategy could be applied to the detection of potassium ions and showed good generality.
引用
收藏
页码：934 / +
页数：3
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