Roll-to-roll fabrication of touch-responsive cellulose photonic laminates.
Springer Science and Business Media LLC
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Liang, H., Bay, M., Vadrucci, R., Barty-King, C., Peng, J., Baumberg, J., De Volder, M., & 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
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.
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)
External DOI: https://doi.org/10.1038/s41467-018-07048-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/286432
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/