Synthesis of Au/Ag nanoframes from Ag nanoplates by galvanic replacement reaction and its optical properties

被引：8
|
作者：
Sung, Hwa Kyung [1 ]
Kim, Younghun [1 ]
机构：
[1] Kwangwoon Univ, Dept Chem Engn, Seoul 139701, South Korea
来源：
MATERIALS LETTERS | 2015年 / 145卷
基金：
新加坡国家研究基金会;
关键词：
Galvanic replacement reaction; Bimetallic nanoparticles; Au/Ag nanoframe; Surface plasmon resonance; SILVER;
D O I：
10.1016/j.matlet.2015.01.081
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Metallic hollow nanostructures, prepared using a galvanic replacement reaction (GRR), give rise to hotspots in electromagnetic fields, due to plasmon coupling between their interior and exterior surface fields. Herein, Au/Ag triangular nanoframes (Au/AgNF) were prepared by a galvanic replacement reaction (GRR) of Ag nanoplates with HAuCl4 in an aqueous solution for 5 mm. Through sequential processes of pre-oxidation and GRR, Au/AgNF with 65/35 ratio of Au/Ag was obtained. An optical change in the UV-vis spectra was confirmed with discrete dipole approximation simulations. The dipole peak of Au/AgNF further red-shifted than the quadrupole peak, found at near-infrared region. (C) 2015 Elsevier B.V. All rights reserved.
引用
收藏
页码：154 / 157
页数：4
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