Combined Antenna and Localized Plasmon Resonance in Raman Scattering from Random Arrays of Silver-Coated, Vertically Aligned Multiwalled Carbon Nanotubes

被引：81

作者：

Dawson, P. ^{[1
]}

Duenas, J. A. ^{[1
]}

Boyle, M. G. ^{[1
]}

Doherty, M. D. ^{[1
]}

Bell, S. E. J. ^{[1
]}

Kern, A. M. ^{[2
]}

Martin, O. J. F. ^{[2
]}

Teh, A. -S. ^{[3
]}

Teo, K. B. K. ^{[3
]}

Milne, W. I. ^{[3
]}

机构：

[1] Queens Univ Belfast, Sch Maths & Phys, Ctr Nanostruct Media, Belfast BT7 INN, Antrim, North Ireland

[2] Ecole Polytech Fed Lausanne, Nanophoton & Metrol Lab, CH-1015 Lausanne, Switzerland

[3] Univ Cambridge, Ctr Appl Photon & Elect, Cambridge CB3 0FA, England

来源：

NANO LETTERS | 2011年 / 11卷 / 02期

基金：

瑞士国家科学基金会;

关键词：

Surface-enhanced Raman scattering; optical antenna; plasmons; surface integral equation; carbon nanotubes; NANOROD ARRAYS; ASPECT RATIO; SURFACE; SPECTROSCOPY; SERS; DEPENDENCE; NANOSTRUCTURES; HYBRIDIZATION; ENHANCEMENT; ELECTRODE;

D O I：

10.1021/nl102838w

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The electric field enhancement associated with detailed structure within novel optical antenna nanostructures is modeled using the surface integral equation technique in the context of surface-enhanced Raman scattering (SERS). The antennae comprise random arrays of vertically aligned, multi-walled carbon nanotubes dressed with highly granular Ag. Different types of "hot-spot" underpinning the SERS are identified, but contrasting characteristics are revealed. Those at the outer edges of the Ag grains are antenna driven with field enhancement amplified in antenna antinodes while intergrain hotspots are largely independent of antenna activity Hot-spots between the tops of antennae leaning towards each other also appear to benefit from antenna amplification.

引用

页码：365 / 371

页数：7

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