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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

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Transparent Polymer Opal Thin Films with Intense UV Structural Color.

Giselle Rosetta^1,2, Matthew Gunn¹, John J Tomes¹

¹Department of Physics, Prifysgol Aberystwyth University, Aberystwyth SY23 3BZ, UK.

Molecules (Basel, Switzerland)

|June 24, 2022

Summary

This summary is machine-generated.

Shear-ordered polymer photonic crystals exhibit strong UV structural color and reflectivity. These materials offer robust, low-cost UV reflection coatings for applications like photovoltaics.

Keywords:

UV reflecting films UV spectroscopy optical characterization photonic crystals polymers thin film coatings

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Area of Science:

Materials Science
Optics
Polymer Science

Background:

Structural color in polymers can be achieved through ordered structures.
Photonic crystals offer tunable optical properties based on their periodic nanostructure.
UV light applications require materials with specific optical and mechanical properties.

Purpose of the Study:

To investigate shear-ordered polymer photonic crystals for UV structural color.
To characterize the angle-dependent optical properties of these polymer composites.
To explore their potential as UV reflection coatings.

Main Methods:

Fabrication of shear-ordered polymer photonic crystals.
Spectroscopic analysis of structural color and photonic bandgap.
Characterization of angle-dependent reflectivity and scattering cones.
Evaluation of spectral anisotropy.

Main Results:

Demonstrated intense UV structural color with a photonic bandgap at 270 nm.
Observed strong reflectivity in the 275-315 nm range, dependent on viewing angle.
Quantified scattering cones and spectral anisotropy in the polymer films.

Conclusions:

Shear-ordered polymer photonic crystals provide tunable UV structural color.
These materials exhibit favorable optical and mechanical properties for UV reflection coatings.
Potential applications include photovoltaics and UV protection.