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Nano Lett. 2008 Nov;8(11):4033-8. doi: 10.1021/nl802877h. Epub 2008 Oct 18.

Self-organized silver nanoparticles for three-dimensional plasmonic crystals.

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  • 1Department of Chemistry, UC Berkeley, Berkeley, California 94720, USA.

Abstract

Metal nanostructures that support surface plasmons are compelling as plasmonic circuit elements and as the building blocks for metamaterials. We demonstrate here the spontaneous self-assembly of shaped silver nanoparticles into three-dimensional plasmonic crystals that display a frequency-selective response in the visible wavelengths. Extensive long-range order mediated by exceptional colloid monodispersity gives rise to optical passbands that can be tuned by particle volume fraction. These metallic supercrystals present a new paradigm for the fabrication of plasmonic materials, delivering a functional, tunable, completely bottom-up optical element that can be constructed on a massively parallel scale without lithography.

PMID:
18928325
[PubMed - indexed for MEDLINE]

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