Multiple Surface Plasmon Modes for Gold/Silver Alloy Nanorods

被引：42

作者：

Bok, Hye-Mi ^{[1
,2
]}

Shuford, Kevin L. ^{[4
]}

Kim, Sungwan ^{[1
,2
]}

KyuKim, Seong ^{[1
,2
]}

Park, Sungho ^{[1
,2
,3
]}

机构：

[1] Sungkyunkwan Univ, Dept Chem, Suwon 440746, South Korea

[2] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea

[3] Sungkyunkwan Univ, Adv Inst Nanotechnol, Suwon 440746, South Korea

[4] Oak Ridge Natl Lab, Div Chem Sci, Oak Ridge, TN 37831 USA

来源：

LANGMUIR | 2009年 / 25卷 / 09期

基金：

瑞典研究理事会;

关键词：

DISCRETE-DIPOLE APPROXIMATION; GOLD NANORODS; SILVER NANOPARTICLES; METAL NANOPARTICLES; OPTICAL-PROPERTIES; COLLOIDAL SOLUTION; ABSORPTION; PARTICLES; RESONANCES; SHAPE;

D O I：

10.1021/la803900w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Alloy nanorods consisting of bimetallic gold and silver are synthesized by employing the electrochemical codeposition of Au/Ag alloy materials into the pores of anodized aluminum oxide templates. This paper presents the variation of localized surface plasmon resonance (LSPR) modes of the Au-x/Ag1-x alloy nanorods as a function of relative compositions of Au and Ag. Transverse and multiple longitudinal modes were observed when the length was longer than ca. 300 nm. For a given length, the transverse LSPR mode systematically blue-shifted as the Ag portion increased, while there was little variation in peak positions of the longitudinal LSPR modes. The optical properties of the Au-x/Ag1-x alloy nanorods were calculated using the discrete dipole approximation and showed a good agreement with the experimental measurements.

引用

页码：5266 / 5270

页数：5

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