Surface Plasmon Resonance of Single Gold Nanodimers near the Conductive Contact Limit

被引：96

作者：

Marhaba, Salem ^{[1
]}

Bachelier, Guillaume ^{[1
]}

Bonnet, Christophe ^{[1
]}

Broyer, Michel ^{[1
]}

Cottancin, Emmanuel ^{[1
]}

Grillet, Nadia ^{[1
]}

Lerme, Jean ^{[1
]}

Vialle, Jean-Louis ^{[1
]}

Pellarin, Michel ^{[1
]}

机构：

[1] Univ Lyon 1, CNRS, Spectrometrie Ion & Mol Lab, UMR 5579, F-69622 Villeurbanne, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 11期

关键词：

DISCRETE DIPOLE APPROXIMATION; SILVER NANOPARTICLES; METAL NANOPARTICLE; OPTICAL-PROPERTIES; PARTICLE PAIRS; SCATTERING; EXTINCTION; CLUSTERS; DIMERS; MODEL;

D O I：

10.1021/jp810405y

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 studied the spectral response of individual pairs of gold nanoparticles chemically synthesized and stabilized on a transparent thin film. Very thin interspacing distances are explored by taking advantage of a residual layer of surfactant molecules at the metal surface. Absolute extinction cross section measurements by the spatial modulation spectroscopy technique are correlated to the corresponding high magnification images independently obtained from transmission electron microscopy. The signature of a transition from isolated to conductively coupled particles is evidenced in the optical spectra and is discussed in relation with their morphology. The strength of the electromagnetic coupling is controlled not only by their spacing but also by the shape of their opposite surfaces in the gap region.

引用

页码：4349 / 4356

页数：8

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