Invited Article: Chiral optics of helicoidal cellulose nanocrystal films

Invited Article: Chiral optics of helicoidal cellulose nanocrystal films

Cellulose nanocrystals in water suspensions behave as lyotropic liquid crystals forming a chiral nematic phase above a critical concentration. Such an organization can be retained in solid films and give rise to an intense colored appearance. Here, we characterize the...

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Main Authors: B. D. Wilts, A. G. Dumanli, R. Middleton, P. Vukusic, S. Vignolini
Format: Article
Language:English
Published: AIP Publishing LLC 2017-04-01
Series:APL Photonics
Online Access:http://dx.doi.org/10.1063/1.4978387
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spelling doaj-78e051298365491b9b00e55c0f5867922020-11-24T21:58:20ZengAIP Publishing LLCAPL Photonics2378-09672017-04-0124040801040801-710.1063/1.4978387006703APPInvited Article: Chiral optics of helicoidal cellulose nanocrystal filmsB. D. Wilts0A. G. Dumanli1R. Middleton2P. Vukusic3S. Vignolini4Adolphe Merkle Institute, University of Fribourg, Chemin des Verdiers 4, 1700 Fribourg, SwitzerlandDepartment of Materials, Imperial College, London, Exhibition Road, SW7 2AZ London, United KingdomDepartment of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, United KingdomDepartment of Physics and Astronomy, University of Exeter, Stocker Road, Exeter EX4 4QL, United KingdomDepartment of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW Cambridge, United KingdomCellulose nanocrystals in water suspensions behave as lyotropic liquid crystals forming a chiral nematic phase above a critical concentration. Such an organization can be retained in solid films and give rise to an intense colored appearance. Here, we characterize their optical response by applying optical and scanning electron microscopy, imaging scatterometry, and angle-resolved reflectance measurements. We show that the experimental results are well explained by computational modeling using the finite-difference time-domain method, but slightly less well by Berremann’s analytical model.http://dx.doi.org/10.1063/1.4978387
collection DOAJ
language English
format Article
sources DOAJ
author B. D. Wilts
A. G. Dumanli
R. Middleton
P. Vukusic
S. Vignolini
spellingShingle B. D. Wilts
A. G. Dumanli
R. Middleton
P. Vukusic
S. Vignolini
Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
APL Photonics
author_facet B. D. Wilts
A. G. Dumanli
R. Middleton
P. Vukusic
S. Vignolini
author_sort B. D. Wilts
title Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
title_short Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
title_full Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
title_fullStr Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
title_full_unstemmed Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
title_sort invited article: chiral optics of helicoidal cellulose nanocrystal films
publisher AIP Publishing LLC
series APL Photonics
issn 2378-0967
publishDate 2017-04-01
description Cellulose nanocrystals in water suspensions behave as lyotropic liquid crystals forming a chiral nematic phase above a critical concentration. Such an organization can be retained in solid films and give rise to an intense colored appearance. Here, we characterize their optical response by applying optical and scanning electron microscopy, imaging scatterometry, and angle-resolved reflectance measurements. We show that the experimental results are well explained by computational modeling using the finite-difference time-domain method, but slightly less well by Berremann’s analytical model.
url http://dx.doi.org/10.1063/1.4978387
work_keys_str_mv AT bdwilts invitedarticlechiralopticsofhelicoidalcellulosenanocrystalfilms
AT agdumanli invitedarticlechiralopticsofhelicoidalcellulosenanocrystalfilms
AT rmiddleton invitedarticlechiralopticsofhelicoidalcellulosenanocrystalfilms
AT pvukusic invitedarticlechiralopticsofhelicoidalcellulosenanocrystalfilms
AT svignolini invitedarticlechiralopticsofhelicoidalcellulosenanocrystalfilms
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