Butterfly wings have brightly colored wings that give off various colors in light. Pigments don't create the colors - rather microscopic structures on the insects’ wings reflect light. They're like the inside of an egg carton, with alternating layers of cuticle and air. Light bounces off the structures so scales look like they shimmer.
Nature reports that Cambridge researchers used nanofabrication techniques to create scales identical to the butterflies’.
Based on this premise, researchers hope to design money or credit cards.
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