Individual Ag Nanowire Dimer for Surface-Enhanced Raman Scattering

被引：18

作者：

Du, ChaoLing ^{[1
]}

You, YuMeng ^{[2
]}

Chen, Tao ^{[3
]}

Zhu, Yan ^{[1
]}

Hu, HaiLong ^{[2
]}

Shi, DaNing ^{[1
]}

Chen, HongYu ^{[3
]}

Shen, ZeXiang ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Sci, Nanjing 211100, Jiangsu, Peoples R China

[2] Nanyang Technol Univ, Sch Phys & Math Sci, Div Phys & Appl Phys, Singapore 637616, Singapore

[3] Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore 637371, Singapore

来源：

PLASMONICS | 2011年 / 6卷 / 04期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Ag nanowires (AgNWs); Dimer; Surface-enhanced Raman scattering (SERS); Electromagnetic (EM) coupling; SILVER NANOWIRE; SINGLE-NANOWIRE; SPECTROSCOPY; NANOPARTICLES; DEPENDENCE; MONOLAYERS; MOLECULES;

D O I：

10.1007/s11468-011-9261-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

We have investigated the polarization-dependent surface-enhanced Raman scattering (SERS) of an individual Ag nanowire (AgNW) dimer, which contains two parallel closely packed AgNWs with very different lengths. Similar cos(2) theta dependence of signal intensities with respect to the polarization angle theta of the incident laser was observed from the dimeric part and the parts of the body as well as the tip of the longer AgNW. The dimeric part was demonstrated to exhibit the strongest SERS effect. The results agree well with our numerical simulations of the electric field distributions using finite element method. The SERS enhancement mechanisms at different parts of the dimer were also discussed which are different in origin.

引用

页码：761 / 766

页数：6

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