From individual to collective chirality in metal nanoparticles |
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Authors: | André s Guerrero-Martí nez,José Lorenzo Alonso-Gó mez,Baptiste Auguié ,M. Magdalena Cid,Luis M. Liz-Marzá n[Author vitae] |
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Affiliation: | aColloid Chemistry Group, Departamento de Química Física and Unidad Asociada CSIC-Universidade de Vigo, 36310 Vigo, Spain;bDepartamento de Química Orgánica, Universidade de Vigo, 36310 Vigo, Spain |
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Abstract: | 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. |
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Keywords: | Chirality Plasmonics Metal nanoparticles Circular dichroism Optical activity Coupled-dipole model |
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