Growth of Tetrahedral Silver Nanocrystals in Aqueous Solution and Their SERS Enhancement

Growth of Tetrahedral Silver Nanocrystals in Aqueous Solution and Their SERS Enhancement

Silver nanocrystals with tetrahedral shapes and {111} faces have been synthesized by the light-driven growth method in an aqueous solution. The nanocrystals of T d symmetry were formed under the effect of tartrate and citrate as the structural-directing reagents at the appropriate stages of reaction...

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Veröffentlicht in:Langmuir 2008-09, Vol.24 (18), p.10407-10413
Hauptverfasser: Zhou, Ji, An, Jing, Tang, Bin, Xu, Shuping, Cao, Yanxin, Zhao, Bing, Xu, Weiqing, Chang, Jingjing, Lombardi, John R
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Sprache:eng
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Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
Surface physical chemistry
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container_end_page 10413
container_issue 18
container_start_page 10407
container_title Langmuir
container_volume 24
creator Zhou, Ji
An, Jing
Tang, Bin
Xu, Shuping
Cao, Yanxin
Zhao, Bing
Xu, Weiqing
Chang, Jingjing
Lombardi, John R
description Silver nanocrystals with tetrahedral shapes and {111} faces have been synthesized by the light-driven growth method in an aqueous solution. The nanocrystals of T d symmetry were formed under the effect of tartrate and citrate as the structural-directing reagents at the appropriate stages of reaction. Further, the nanocrystals may be assembled through electrostatic interaction to develop large-scale particle surfaces with sharp vertexes, which can generate strong localized electromagnetic field for surface-enhanced Raman scattering (SERS) studies. Benzenethiol was used as the probe to evaluate their SERS enhancement, and enhancement factors of up to 106 are reached. As a kind of promising material, these novel nanocrystals will be applied in surface enhanced spectroscopy and plasmonics field.
doi_str_mv 10.1021/la800961j
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source ACS Journals: American Chemical Society Web Editions
subjects Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Materials: Nano-and Mesostructured Materials, Polymers, Gels, Liquid Crystals, Composites
Surface physical chemistry
title Growth of Tetrahedral Silver Nanocrystals in Aqueous Solution and Their SERS Enhancement
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