Invited Article: Chiral optics of helicoidal cellulose nanocrystal films
Published version
Peer-reviewed
Repository URI
Repository DOI
Change log
Authors
Wilts, BD
Dumanli, AG
Middleton, Roxanne https://orcid.org/0000-0002-5309-3517
Vukusic, P
Vignolini, Silvia https://orcid.org/0000-0003-0664-1418
Abstract
Cellulose nanocrystals (CNCs) in water suspensions behave as lyotropic liquid crystals forming a chiral nematic phase above a critical concentration. Such organization can be retained in solid films and give rise to an intense colored appearance. Here, we fully 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.
Description
Keywords
51 Physical Sciences, 5104 Condensed Matter Physics
Journal Title
APL Photonics
Conference Name
Journal ISSN
2378-0967
2378-0967
2378-0967
Volume Title
2
Publisher
AIP Publishing
Publisher DOI
Sponsorship
EPSRC (1360817)
Biotechnology and Biological Sciences Research Council (BB/K014617/1)
Engineering and Physical Sciences Research Council (EP/G037221/1)
European Research Council (639088)
Biotechnology and Biological Sciences Research Council (BB/K014617/1)
Engineering and Physical Sciences Research Council (EP/G037221/1)
European Research Council (639088)
This work was supported by the EPSRC Cambridge NanoDTC [No. EP/G037221/1 to R.M.], the National Centre of Competence in Research “Bio-InspiredMaterials”, the Ambizione program of the Swiss National Science Foundation [No. 168223 to B.D.W.], the European Research Council [No. ERC-2014-STG H2020 639088 to S.V. and A.G.D.], and the BBSRC David Phillips fellowship [No. BB/K014617/1 to S.V.].