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. 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 10(6) are reached. As a kind of promising material, these novel nanocrystals will be applied in surface enhanced spectroscopy and plasmonics field.
Zhou
Ji
J
State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, P. R. China.
An
Jing
J
Tang
Bin
B
Xu
Shuping
S
Cao
Yanxin
Y
Zhao
Bing
B
Xu
Weiqing
W
Chang
Jingjing
J
Lombardi
John R
JR