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Scientists from Yale-NUS College and the University of Fribourg have discovered a novel color-generating mechanism used by the iridescent rainbow weevil to create a spectrum of colors:
… the researchers determined that the scales of the insect were composed of a 3D photonic crystalline structure made from chitin, the main ingredient in insect exoskeletons. They further discovered that the vibrant rainbow colors on this weevil’s scales are caused by two factors: the size of the crystal structure that makes up each scale, and the volume of chitin used to form the crystal structure. Larger scales have a larger crystalline structure and use a larger volume of chitin to reflect red light; smaller scales have a smaller crystalline structure and use a smaller volume of chitin to reflect blue light.
“The ability to produce these structures, which are able to provide a high color fidelity regardless of the angle you view it from, will have applications in any industry which deals with color production,” said Yale-NUS professor Vinodkumar Saranathan. "We can use these structures in cosmetics and other pigmentations to ensure high-fidelity hues, or in digital displays in your phone or tablet, which will allow you to view it from any angle and see the same true image without any color distortion. We can even use them to make reflective cladding for optical fibers to minimize signal loss during transmission."
(Image: Dr. Bodo D. Wilts)
Source: neatorama