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Issue 20, 2013
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Substrate-mediated charge transfer plasmons in simple and complex nanoparticle clusters

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Abstract

A conductive substrate can provide a simple and straightforward way to induce charge-transfer plasmon modes in Au nanoparticle clusters. For a simple dimer structure, a remarkably narrow charge transfer plasmon, which differs dramatically from the dipolar plasmon mode of the electrically isolated nanostructure, is clearly observed. For a more complex nonamer cluster that supports a strong Fano resonance on an insulating substrate, a mixed charge transfer-dipole mode is observed, where charge transfer is induced on the outer nanoparticles, establishing an opposing dipole on the intervening central particles, resulting in a strongly damped far field response.

Graphical abstract: Substrate-mediated charge transfer plasmons in simple and complex nanoparticle clusters

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Supplementary files

Article information


Submitted
31 May 2013
Accepted
07 Aug 2013
First published
21 Aug 2013

Nanoscale, 2013,5, 9897-9901
Article type
Paper

Substrate-mediated charge transfer plasmons in simple and complex nanoparticle clusters

Y. Wang, Z. Li, K. Zhao, A. Sobhani, X. Zhu, Z. Fang and N. J. Halas, Nanoscale, 2013, 5, 9897
DOI: 10.1039/C3NR02835F

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