structuralcoloration
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Exotic bird inspires cheaper light-based camouflage design
Colors usually come from pigments or dyes, but are also created when light is refracted and reflected by microscopic structures. Those iridescent hues, known as "structural coloration," are often seen in nature on bird or butterfly wings. While durable and potentially useful for military and industrial applications, it's difficult and pricey to produce. However, Harvard University researchers have developed a robust and inexpensive way to build materials with structural coloring that could be used for camouflage, solar cells and optical switches.
