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Issue 9, 2011
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Au@Ag core–shell nanoparticles: efficient all-plasmonic Fano-resonance generators

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Abstract

Fano resonances (FR) in strongly coupled systems like a metallic dimer arise due to the coupling between the spectrally localized surface plasmon resonance (SPR) of a noble metal nanoparticle and the continuum of interband transitions of the other. Since its discovery in Au–Ag dimers, several plasmonic structures have been proposed as candidates for obtaining Fano resonances. However, most of them either are difficult to synthesize or do not generate FR signal of adequate intensity. In this paper we demonstrate that simple Au@Ag core–shell nanoparticles with typical shell thickness below 5.0 nm, which can be synthesized through a common citrate reduction method, have a Fano resonance easily detectable in the far-field.

Graphical abstract: Au@Ag core–shell nanoparticles: efficient all-plasmonic Fano-resonance generators

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Supplementary files

Article information


Submitted
16 Jun 2011
Accepted
15 Jul 2011
First published
03 Aug 2011

Nanoscale, 2011,3, 3609-3612
Article type
Communication

Au@Ag core–shell nanoparticles: efficient all-plasmonic Fano-resonance generators

O. Peña-Rodríguez and U. Pal, Nanoscale, 2011, 3, 3609
DOI: 10.1039/C1NR10625B

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