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Numerical study of the thermally adaptive emissivity of VO2–polymer nanostructured coatings

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Abstract

The emissivity of an opal photonic crystal loaded with thermochromic ${{\rm VO}_2}$ nanoparticles is studied through optical calculations, highlighting the influence of the structure by comparison with a homogenized model. Parameters are first set to maximize the structure influence on material emissivity. Then, a full study of the influence of the ${{\rm VO}_2}$ concentration is made to identify, on one hand, cases with the highest structure impact, and on the other hand, interesting cases for applications such as energy-efficient coatings for buildings, satellites, and camouflage applications.

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