A sensitive localized surface plasmon resonance sensor for determining mercury(II) ion using noble metal nanoparticles as probe

被引：33
|
作者：
Bi, Ning [1 ]
Chen, Yanhua [1 ]
Qi, Haibo [1 ]
Zheng, Xia [1 ]
Chen, Yang [1 ]
Liao, Xue [1 ]
Zhang, Hanqi [1 ]
Tian, Yuan [1 ]
机构：
[1] Jilin Univ, Coll Chem, Changchun 130012, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2012年 / 95卷
基金：
中国国家自然科学基金;
关键词：
Localized surface plasmon resonance (LSPR); Mercury(II) ion; Noble metal nanoparticles (NPs); ATOMIC FLUORESCENCE SPECTROMETRY; UNMODIFIED GOLD NANOPARTICLES; COLORIMETRIC DETECTION; ABSORPTION SPECTROMETRY; SILVER NANOPARTICLES; DNA; MECHANISM; NANORODS;
D O I：
10.1016/j.saa.2012.04.086
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The noble metal nanoparticles (NPs), including gold nanorods (AuNRs), gold nanospheres (AuNSs) and silver nanoplates (AgNFTs), were synthesized and Tween 20 stabilized NPs (Tween 20-NPs) were used as the probes for determining Hg2+. Hg2+ was determined based on the strong affinity between Au (Ag) and Hg. Hg2+ was reduced to Hg in the presence of sodium borohydride. Hg interacts with the NPs and the diameter of the NPs decreases with the increase of Hg2+ concentration, which causes the shift in absorption peak of Tween 20-NP5. The peak shifts are linearly related to Hg2+ concentrations. Compared with AuNSs and AgNFTs, when the AuNRs was used, the sensitivity for determining Hg2+ was higher. The developed method shows a good selectivity for Hg2+ and can be applied to the determination of Hg2+ in water samples. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：276 / 281
页数：6
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