Label-free SERS study of galvanic replacement reaction on silver nanorod surface and its application to detect trace mercury ion.
Label-free SERS study of galvanic replacement reaction on silver nanorod surface and its application to detect trace mercury ion.
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银纳米棒表面电偶置换反应的无标记SERS研究及其在痕量汞离子检测中的应用
DOI：
10.1038/srep19650
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发表时间：
2016-01-21
影响因子：
4.6
通讯作者：
Jiang Z
中科院分区：
文献类型：
--
作者：
Wang Y;Wen G;Ye L;Liang A;Jiang Z
It is significant to explore a rapid and highly sensitive galvanic replacement reaction (GRR) surface enhanced Raman scattering (SERS) method for detection of trace mercury ions. This article was reported a new GRR SERS analytical platform for detecting Hg (II) with label-free molecular probe Victoria blue B (VBB). In HAc-NaCl-silver nanorod (AgNR) substrate, the molecular probe VBB exhibited a strong SERS peak at 1609 cm− 1. Upon addition of Hg (II), the GRR occurred between the AgNR and Hg (II) and formed a weak SERS activity of Hg2Cl2 that deposited on the AgNR surfaces to decrease the SERS intensity at 1609 cm− 1. The decreased SERS intensity was linear to Hg (II) concentration in the range of 1.25–125 nmol/L, with a detection limit of 0.2 nmol/L. The GRR was studied by SERS, transmission electron microscopy and other techniques and the GRR mechanism was discussed.
