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Helical Assemblies of Gold Nanoparticles
Author(s) -
Lilly G. Daniel,
Agarwal Ashish,
Srivastava Sudhanshu,
Kotov Nicholas A.
Publication year - 2011
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201100536
Subject(s) - materials science , metamaterial , nanoparticle , nanowire , nanotechnology , optical rotation , colloidal gold , polarization (electrochemistry) , wavelength , optoelectronics , metal , optics , chemistry , physics , metallurgy
Chiral metallic nanohelices with periodicity in the submicrometer regime are made from twisted CdTe nanoribbons. These helices are highly effective in polarization rotation at wavelengths centered at their pitch length. Interestingly, the chiro‐optical performance of helical nanoparticle assemblies is better than that of solid gold nanowires with similar geometries, which sets an important target for the design of metamaterials.