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Thermochromic polymer opals

Appl. Phys. Lett. 95, 173116 (2009); doi:10.1063/1.3256193

Published 30 October 2009

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Jason Sussman,1 David Snoswell,1 Andreas Kontogeorgos,1 Jeremy J. Baumberg,1 and Peter Spahn2
1NanoPhotonics Centre, Cavendish Laboratory, University of Cambridge, Cambridge CB3 OHE, United Kingdom
2Deutsches Kunststoff-Institut, Schlossgartenstrasse 6, D-64289 Darmstadt, Germany
Large-scale shear-ordered photonic crystals are shown to exhibit unusual thermochromic properties. By balancing the refractive index of the polymer core and composite shell components at room temperature, transparent films are created, which become colored on heating to 150 °C. Since this scattering-based structural color depends only on resonant Bragg scattering of the unpigmented components, it can be tuned to any wavelength. The observed color shifts with temperature are not simply accounted for by theory and are sensitive to the constituents. ©2009 American Institute of Physics
History: Received 3 August 2009; accepted 6 October 2009; published 30 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/173116/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.25.Gy
    Edge and boundary effects; optical reflection and refraction
  • 42.70.Qs
    Photonic bandgap materials
  • 78.20.Ci
    Optical constants
  • YEAR: 2009

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ISSN:
0003-6951 (print)   1077-3118 (online)
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