Synthesis, characterization and SERS activity of Au-Ag nanorods

被引：40
|
作者：
Philip, Daizy [1 ]
Gopchandran, K. G. [2 ]
Unni, C. [2 ]
Nissamudeen, K. M. [2 ]
机构：
[1] Mar lvanios Coll, Dept Phys, Thiruvananthapuram 695015, Kerala, India
[2] Univ Kerala, Dept Optoelect, Kariyavattom 695581, India
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2008年 / 70卷 / 04期
关键词：
gold nanoparticles; mixed Au-Ag nanoparticles; Au-Ag alloy nanorods; UV-vis spectra; TEM; SERS; NIR laser excitation; sodium salicylate;
D O I：
10.1016/j.saa.2007.09.016
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
The formation mechanism and morphology of Au-Ag bimetallic colloidal nanoparticles depend on the composition. Ag coated Au colloidal nanoparticles have been prepared by deposition of Ag through chemical reduction on performed Au colloid. The composition of the Au100-x-Ag-x particles was varied from x = 0 to 50. The obtained colloids were characterized by UV-vis spectroscopy and transmission electron microscopy (TEM). The Au-80-Ag-20 colloid consists of alloy nanorods with dimension of 25 nm x 100 nm. The activity of these nanorods in surface enhanced Raman spectroscopy (SERS) was checked by using sodium salicylate as an adsorbate probe. Intense SERS bands are observed indicating its usefulness as a SERS substrate in near infrared (NIR) laser excitation. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：780 / 784
页数：5
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