Roll-to-roll fabrication of touch-responsive cellulose photonic laminates.
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Authors
Publication Date
2018-11-06Journal Title
Nat Commun
ISSN
2041-1723
Publisher
Springer Science and Business Media LLC
Volume
9
Issue
1
Pages
4632
Language
eng
Type
Article
This Version
VoR
Physical Medium
Electronic
Metadata
Show full item recordCitation
Liang, H., Bay, M. M., Vadrucci, R., Barty-King, C. H., Peng, J., Baumberg, J. J., De Volder, M. F., & et al. (2018). Roll-to-roll fabrication of touch-responsive cellulose photonic laminates.. Nat Commun, 9 (1), 4632. https://doi.org/10.1038/s41467-018-07048-6
Abstract
Hydroxypropyl-cellulose (HPC), a derivative of naturally abundant cellulose, can self-assemble into helical nanostructures that lead to striking colouration from Bragg reflections. The helical periodicity is very sensitive to pressure, rendering HPC a responsive photonic material. Recent advances in elucidating these HPC mechano-chromic properties have so-far delivered few real-world applications, which require both up-scaling fabrication and digital translation of their colour changes. Here we present roll-to-roll manufactured metre-scale HPC laminates using continuous coating and encapsulation. We quantify the pressure response of the encapsulated HPC using optical analyses of the pressure-induced hue change as perceived by the human eye and digital imaging. Finally, we show the ability to capture real-time pressure distributions and temporal evolution of a human foot-print on our HPC laminates. This is the first demonstration of a large area and cost-effective method for fabricating HPC stimuli-responsive photonic films, which can generate pressure maps that can be read out with standard cameras.
Keywords
cholesteric liquid crystals, cellulose, photonic structures, pressure sensors, roll to roll
Sponsorship
Biotechnology and Biological Sciences Research Council (BB/K014617/1)
Engineering and Physical Sciences Research Council (EP/N016920/1)
European Research Council (639088)
Engineering and Physical Sciences Research Council (EP/L027151/1)
Engineering and Physical Sciences Research Council (EP/L016567/1)
Swiss National Science Foundation (165176)
Biotechnology and Biological Sciences Research Council (BB/L016567/1)
Engineering and Physical Sciences Research Council (EP/G060649/1)
Identifiers
External DOI: https://doi.org/10.1038/s41467-018-07048-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286432
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