Several nanoengineered materials have been proposed as potential alternatives to chemical colorants. Although they are non-toxic and stable, they suffer from severe angle and polarization sensitivity, lack of saturation, limited color-palette, and are impractical to integrate with industrial standards. Here, we present an approach to structural coloration that avoids these limitations by exploiting the strong hybridization of localized and cavity modes of a layer of self-assembled plasmonic nanoparticles in the proximity of a mirror. Our approach offers a versatile platform for environmental-friendly, large-scale, and low-cost paint solution that bridges the gap from proof-of-concept science to real-world industrial applications.
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