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Article

Transparent Polymer Opal Thin Films with Intense UV Structural Color

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Department of Physics, Prifysgol Aberystwyth University, Aberystwyth SY23 3BZ, UK
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Varichem Co., Ltd., Brynmawr NP23 4BX, UK
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Minton Treharne and Davies, Cardiff CF14 7HY, UK
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Polymer Chemistry, Saarland University, Campus C4 2, 66123 Saarbrücken, Germany
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Saarene, Saarland Center for Energy Materials and Sustainability, Campus Saarbrücken C4 2, 66123 Saarbrücken, Germany
*
Author to whom correspondence should be addressed.
Academic Editor: Jacques Lalevee
Molecules 2022, 27(12), 3774; https://doi.org/10.3390/molecules27123774
Received: 19 May 2022 / Revised: 7 June 2022 / Accepted: 8 June 2022 / Published: 11 June 2022
(This article belongs to the Special Issue Polymeric Photonic Materials)
We report on shear-ordered polymer photonic crystals demonstrating intense structural color with a photonic bandgap at 270 nm. Our work examines this UV structural color, originating from a low refractive index contrast polymer composite system as a function of the viewing angle. We report extensive characterization of the angle-dependent nature of this color in the form of ‘scattering cones’, which showed strong reflectivity in the 275–315 nm range. The viewing range of the scattering was fully quantified for a number of planes and angles, and we additionally discuss the unique spectral anisotropy observed in these structures. Such films could serve as low-cost UV reflection coatings with applications in photovoltaics due to the fact of their non-photobleaching and robust mechanical behavior in addition to their favorable optical properties. View Full-Text
Keywords: photonic crystals; UV spectroscopy; optical characterization; polymers; thin film coatings; UV reflecting films photonic crystals; UV spectroscopy; optical characterization; polymers; thin film coatings; UV reflecting films
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MDPI and ACS Style

Rosetta, G.; Gunn, M.; Tomes, J.J.; Butters, M.; Pieschel, J.; Hartmann, F.; Gallei, M.; Finlayson, C.E. Transparent Polymer Opal Thin Films with Intense UV Structural Color. Molecules 2022, 27, 3774. https://doi.org/10.3390/molecules27123774

AMA Style

Rosetta G, Gunn M, Tomes JJ, Butters M, Pieschel J, Hartmann F, Gallei M, Finlayson CE. Transparent Polymer Opal Thin Films with Intense UV Structural Color. Molecules. 2022; 27(12):3774. https://doi.org/10.3390/molecules27123774

Chicago/Turabian Style

Rosetta, Giselle, Matthew Gunn, John J. Tomes, Mike Butters, Jens Pieschel, Frank Hartmann, Markus Gallei, and Chris E. Finlayson. 2022. "Transparent Polymer Opal Thin Films with Intense UV Structural Color" Molecules 27, no. 12: 3774. https://doi.org/10.3390/molecules27123774

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