Au Core/Au-Ag Alloy Shell Nanorods: Composition- and Shape-Tailored Optical Responses

被引：0
|
作者：
Liu, Jianbo [1 ]
Feng, Lili [1 ]
Hu, Zhijian [1 ]
Hu, Xiaona [1 ]
Hou, Shuai [1 ]
Wen, Tao [1 ]
Liu, Wenqi [1 ]
Zhang, Ke [1 ]
Zhu, Xing [2 ]
Ji, Yinglu [1 ]
Wang, Qi [1 ]
Guo, Yuting [1 ]
Wu, Xiaochun [1 ]
机构：
[1] Natl Ctr Nanosci & Technol, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China
[2] Peking Univ, Dept Phys, Beijing 100871, Peoples R China
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2013年 / 13卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Gold; Silver; Alloy; Core-Shell; Nanorod; SERS; GOLD; GROWTH; NANOSTRUCTURES; NANOCRYSTALS; FACETS;
D O I：
10.1166/jnn.2013.6089
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A feasible way is developed to prepare Au core/Au-Ag alloy shell nanorods (Au@AuxAg1-X, NRs) based on co-reduction of gold and silver ions under the guidance of Au NRs templates. Alloy nanorods with a wide composition range (x tunable from 0 to 1) are obtained. The Ag+/Au3+ ratios are found to affect the detailed morphology of the endcaps, which is responsible for the abnormal red-shift of localized surface plasmon resonance (SPR) mode. In consensus with theoretical prediction, dielectric sensitivity of the alloy NRs is mainly determined by the maximum of the LSPR band. Due to the change in electron structure, the alloy shells exhibit lower SERS activities than pure Ag shell.
引用
收藏
页码：1006 / 1010
页数：5
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