Cseh, L., Mang, X., Zeng, X. et al. (4 more authors) (2015) Helically Twisted Chiral Arrays of Gold Nanoparticles Coated with a Cholesterol Mesogen. Journal of the American Chemical Society, 137 (40). pp. 12736-12739. ISSN 0002-7863
Abstract
Gold nanoparticles have been prepared and surface-functionalized with a 1:1 molar mixture of a hexylthiol ligand and a chiral mesogenic ligand consisting of a cholesterylbenzoate attached via an undecylthiol spacer. Grazing incidence X-ray diffraction showed that upon annealing a columnar liquid crystal (LC) structure develops with the nanoparticles forming strings on a regular oblique 2d lattice. Synchrotron radiation circular dichroism is substantially enhanced upon the isotropic− LC transition. In the proposed structural model, layers of Au columns rotate by a small angle relative to their neighbors, with the columns winding around a helical axis. The work demonstrates that it is possible to obtain chiral LC superstructures from nanoparticles coated with chiral mesogen without the addition of a separate LC or chiral dopants. The results provide direction in the development of plasmonic metamaterials interacting selectively with circularly polarized light.
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Copyright, Publisher and Additional Information: | © 2015 American Chemical Society. This is an author produced version of a paper subsequently published in Journal of the American Chemical Society. Uploaded in accordance with the publisher's self-archiving policy. | ||||||
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Institution: | The University of Sheffield | ||||||
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) | ||||||
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Depositing User: | Symplectic Sheffield | ||||||
Date Deposited: | 21 Apr 2016 07:56 | ||||||
Last Modified: | 28 Oct 2016 00:03 | ||||||
Published Version: | http://dx.doi.org/10.1021/jacs.5b05059 | ||||||
Status: | Published | ||||||
Publisher: | American Chemical Society | ||||||
Refereed: | Yes | ||||||
Identification Number: | https://doi.org/10.1021/jacs.5b05059 | ||||||
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