Localized plasmon resonances of bimetallic AgAuAg nanorods

被引：13

作者：

Ahn, Sung-Hyun ^{[1
]}

Kim, Deok-Soo ^{[1
]}

Seo, Daeha ^{[2
]}

Choi, Wonjun ^{[3
]}

Yi, Gi-Ra ^{[4
]}

Song, Hyunjoon ^{[2
]}

Park, Q-Han ^{[3
]}

Kim, Zee Hwan ^{[1
]}

机构：

[1] Korea Univ, Dept Chem, Seoul 137701, South Korea

[2] Korea Adv Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[3] Korea Univ, Dept Phys, Seoul 137701, South Korea

[4] Sungkyunkwan Univ, Dept Polymer Sci & Engn, Gyeonggi 440746, South Korea

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2013年 / 15卷 / 12期

基金：

新加坡国家研究基金会;

关键词：

OPTICAL-PROPERTIES; GOLD NANORODS; NANOPARTICLES; MODES; NANOSTRUCTURES; SPECTROSCOPY;

D O I：

10.1039/c2cp43365f

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 investigated the localized surface plasmon resonances of individual AgAuAg nanorods (NRs) using the dark-field spectro-microscopy technique. We find that the scattering spectra of such hetero-NRs show longitudinal resonance wavelengths that are nearly insensitive to the relative composition of Ag and Au. Instead, the resonance is mostly governed by the overall length of the nanorod. This shows that the plasmons oscillate along the entire length of the NR without the significant perturbation at the Ag-Au interfaces. The results demonstrate that the overall geometry as well as the composition determine the tunability of the hetero-metallic nanostructures, and provide an important design rule for the composition-tunable bimetallic plasmon structures.

引用

页码：4190 / 4194

页数：5

共 24 条

[1] Nanoantennas for visible and infrared radiation [J].