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Visual appearance of chiral nematic cellulose-based photonic films: angular and polarization independent color response with a twist

Accepted version
Peer-reviewed

Type

Article

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Authors

Chan, Chun Lam Clement  ORCID logo  https://orcid.org/0000-0002-5812-8440
Bay, Mélanie Marthe 
Roberto, Vadrucci 
Williams, Cyan Abigail 

Abstract

Hydroxypropyl cellulose (HPC) is a biocompatible cellulose derivative capable of self assembling into a lyotropic chiral nematic phase in aqueous solution. This liquid crystalline phase reflects right-handed circular polarized light of a specific color as a function of the HPC weight fraction. Here, we demonstrate that, by introducing a crosslinking agent, it is possible to drastically alter the visual appearance of the HPC mesophase in terms of the reflected color, the scattering distribution and the polarization response, resulting in an exceptional matte appearance in dry solid-state films. By exploiting the interplay between order and disorder, a robust and simple methodology towards the preparation of polarization and angular independent color was developed, which constitutes an important step towards the development of real-world photonic colorants.

Description

Keywords

chiral nematic liquid crystals, hydroxypropyl cellulose, structural color

Journal Title

Advanced Materials

Conference Name

Journal ISSN

0935-9648
1521-4095

Volume Title

31

Publisher

Wiley-Blackwell
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/K014617/1)
Engineering and Physical Sciences Research Council (EP/R511675/1)
Engineering and Physical Sciences Research Council (EP/L016087/1)
European Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (722842)
Swiss National Science Foundation (165176)
European Research Council (639088)
European Research Council (790518)
This work is funded by EPSRC grant EP/R511675/1 to B.F.-P., S.V.; by EPSRC grant EP/L016087/1 to C.A.W.; by BBSRC David Phillips fellowship BB/K014617/1 to G.J., S.V.; by EU’s Horizon 2020 research and innovation programme under the Marie Skodowska-Curie grant agreement No. 722842 (ITN Plant-inspired Materials and Surfaces – PlaMatSu) to G.T.K., S.V.; by Swiss National Science Foundation #165176 to R.V.; by Croucher Cambridge International Scholarship to C.L.C.C.; by ERC grant ERC 2014 STG H2020 639088 to M.M.B., G.J., S.V.; by ERC grant ERC 2017 POC 790518 to R.M.P., S.V.