共 50 条
A sensitive localized surface plasmon resonance sensor for determining mercury(II) ion using noble metal nanoparticles as probe
被引:34
|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
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
相关论文