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Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation

The circularly polarized reflection of nature is due to their distinct azimuthally twisted or helical character in the nanostructure of the surface films. Although many chiral inorganic powders have been successfully synthesised, the artificial synthesis of chiral inorganic films is rare. Herein, we...

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Autores principales: Liu, Ben, Han, Lu, Duan, Yingying, Cao, Yunayuan, Feng, Ji, Yao, Yuan, Che, Shunai
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4007082/
https://www.ncbi.nlm.nih.gov/pubmed/24784912
http://dx.doi.org/10.1038/srep04866
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author Liu, Ben
Han, Lu
Duan, Yingying
Cao, Yunayuan
Feng, Ji
Yao, Yuan
Che, Shunai
author_facet Liu, Ben
Han, Lu
Duan, Yingying
Cao, Yunayuan
Feng, Ji
Yao, Yuan
Che, Shunai
author_sort Liu, Ben
collection PubMed
description The circularly polarized reflection of nature is due to their distinct azimuthally twisted or helical character in the nanostructure of the surface films. Although many chiral inorganic powders have been successfully synthesised, the artificial synthesis of chiral inorganic films is rare. Herein, we reported a facile synthetic route for the growth of monolayered chiral film on the quaternary ammonium-modified silicon substrate. The films grew on the substrate surface because of the strong electrostatic interaction between positively charged quaternary ammonium groups and negatively charged phosphate groups of DNA, with subsequent growth to right-handed, vertically aligned, impeller-like helical architectures with left-handed two-dimensional square p4mm-structured DNA chiral packing. The DNA–silica composite films exhibited strong optical activity at 295 nm and in the range of 400–800 nm, corresponding to DNA chiral packing (absorption) and to the helical blade in the impeller (scattering), respectively. Upon removal of DNA templates, the pure inorganic impeller-like helical morphology was maintained; consequently, the scattering-based optical response was blue-shifted approximately 200 nm as a result of a decrease in the effective average refractive index. The hierarchical structures were reflected from the surfaces by cross-polarised light, which confirmed that the films were strongly birefringent, with long-range anisotropy.
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spelling pubmed-40070822014-05-05 Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation Liu, Ben Han, Lu Duan, Yingying Cao, Yunayuan Feng, Ji Yao, Yuan Che, Shunai Sci Rep Article The circularly polarized reflection of nature is due to their distinct azimuthally twisted or helical character in the nanostructure of the surface films. Although many chiral inorganic powders have been successfully synthesised, the artificial synthesis of chiral inorganic films is rare. Herein, we reported a facile synthetic route for the growth of monolayered chiral film on the quaternary ammonium-modified silicon substrate. The films grew on the substrate surface because of the strong electrostatic interaction between positively charged quaternary ammonium groups and negatively charged phosphate groups of DNA, with subsequent growth to right-handed, vertically aligned, impeller-like helical architectures with left-handed two-dimensional square p4mm-structured DNA chiral packing. The DNA–silica composite films exhibited strong optical activity at 295 nm and in the range of 400–800 nm, corresponding to DNA chiral packing (absorption) and to the helical blade in the impeller (scattering), respectively. Upon removal of DNA templates, the pure inorganic impeller-like helical morphology was maintained; consequently, the scattering-based optical response was blue-shifted approximately 200 nm as a result of a decrease in the effective average refractive index. The hierarchical structures were reflected from the surfaces by cross-polarised light, which confirmed that the films were strongly birefringent, with long-range anisotropy. Nature Publishing Group 2014-05-02 /pmc/articles/PMC4007082/ /pubmed/24784912 http://dx.doi.org/10.1038/srep04866 Text en Copyright © 2014, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/3.0/ This work is licensed under a Creative Commons Attribution 3.0 Unported License. The images in this article are included in the article's Creative Commons license, unless indicated otherwise in the image credit; if the image is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the image. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/
spellingShingle Article
Liu, Ben
Han, Lu
Duan, Yingying
Cao, Yunayuan
Feng, Ji
Yao, Yuan
Che, Shunai
Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation
title Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation
title_full Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation
title_fullStr Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation
title_full_unstemmed Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation
title_short Growth of Optically Active Chiral Inorganic Films through DNA Self-Assembly and Silica Mineralisation
title_sort growth of optically active chiral inorganic films through dna self-assembly and silica mineralisation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4007082/
https://www.ncbi.nlm.nih.gov/pubmed/24784912
http://dx.doi.org/10.1038/srep04866
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