Journal
NANO TODAY
Volume 6, Issue 4, Pages 381-400Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.nantod.2011.06.003
Keywords
Chirality; Plasmonics; Metal nanoparticles; Circular dichroism; Optical activity; Coupled-dipole model
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Funding
- Spanish Ministerio de Ciencia e Innovacion [MAT2010-15374, CTQ2010-18576]
- Xunta de Galicia [09TMT011314PR]
- EU [CP-248236, CP-FP 213948-2]
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Recent reports have illustrated the promising potential of chiral metal nanostructures, which exploit the characteristic localized surface plasmon resonance of metal colloids, to produce intense optical activity. In this article we review the concepts, synthetic methods, and theoretical predictions underlying the chirality of metal colloids with a particular emphasis on the size range of 10-100 nanometers. The formation of individual colloidal nanoparticles with a chiral morphology and a plasmonic response remains elusive; however, collective chirality and the associated optical activity in nanoparticle assemblies is a promising alternative that has seen a few recent experimental demonstrations. We conclude with a perspective on chiral nanostructures built up from achiral anisotropic metal particles. (C) 2011 Elsevier Ltd. All rights reserved.
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