Cellulose photonic pigments.
Springer Science and Business Media LLC
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Parker, R., Zhao, T. H., Frka-Petesic, B., & Vignolini, S. (2022). Cellulose photonic pigments.. Nat Commun, 13 (1) https://doi.org/10.1038/s41467-022-31079-9
Funder: Winton Programme for the Physics of Sustainability (PhD scholarship)
When pursuing sustainable approaches to fabricate photonic structures, nature can be used as a source of inspiration for both the nanoarchitecture and the constituent materials. Although several biomaterials have been promised as suitable candidates for photonic materials and pigments, their fabrication processes have been limited to the small to medium-scale production of films. Here, by employing a substrate-free process, structurally coloured microparticles are produced via the confined self-assembly of a cholesteric cellulose nanocrystal (CNC) suspension within emulsified microdroplets. Upon drying, the droplets undergo multiple buckling events, which allow for greater contraction of the nanostructure than predicted for a spherical geometry. This buckling, combined with a solvent or thermal post-treatment, enables the production of dispersions of vibrant red, green, and blue cellulose photonic pigments. The hierarchical structure of these pigments enables the deposition of coatings with angular independent colour, offering a consistent visual appearance across a wide range of viewing angles.
Article, /639/301/54/989, /639/301/923/916, /639/301/923/919, /639/624/399/1022, /639/301/923/966, /128, /147, /147/135, article
Is supplemented by: https://doi.org/10.17863/CAM.72840
This work was supported by: the European Research Council ([ERC-2014-STG H2020 639088] and [ERC-2017-POC 790518] to S.V., R.P., T. Z., & B.F.-P.), the BBSRC ([David Phillips Fellowship BB/K014617/1] to S.V. and [BB/V00364X/1] to S.V. & R.P.), the EPSRC ([EP/R511675/1] to S.V. & R.P.), and the Winton Programme for the Physics of Sustainability (PhD scholarship to T.Z.).
Engineering and Physical Sciences Research Council (EP/R511675/1)
European Research Council (639088)
Biotechnology and Biological Sciences Research Council (BB/K014617/1)
European Research Council (790518)
External DOI: https://doi.org/10.1038/s41467-022-31079-9
This record's URL: https://www.repository.cam.ac.uk/handle/1810/338032