Surface-enhanced Raman scattering of water in aqueous dispersions of silver nanoparticles

被引：0
作者：
Filipczak P. [1 ]
Halagan K. [1 ]
Ulański J. [1 ]
Kozanecki M. [1 ]
机构：
[1] Department of Molecular Physics, Faculty of Chemistry, Lodz University of Technology, Zeromskiego 116, Lodz
来源：
Beilstein Journal of Nanotechnology | 2021年 / 12卷
关键词：
Dynamic lattice liquid (DLL) simulations; liquid water; plasmons; resonance Raman effect; surface-enhanced Raman scattering; water structure;
D O I：
10.3762/BJNANO.12.40
中图分类号：
学科分类号：
摘要：
The resonance Raman effect (RRE) is a phenomenon which results in a strong selective enhancement of Raman signals from the samples. Previous studies showed that the RRE in liquid water directly corresponds to its supramolecular structure. It was also reported that the electric-field-induced orientation of water molecules on the electrode surface results in the surface-enhanced Raman scattering (SERS) effect. In this work, we show the SERS effect for water molecules in the dispersion of silver nanoparticles (AgNPs) without any external electrical field. An enhancement factor was estimated to be (4.8 ± 0.8) x 106 for an excitation wavelength of 514.5 nm and for AgNPs with an average size of 34 ± 14 nm. The temperature experiment results showed a higher enhancement with temperature increase. Performed simulation studies revealed a slowdown of the mobility of the water molecules close to the surface of AgNPs. © 2021 Filipczak et al. All Rights Reserved.
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页码：497 / 506.
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