Close up macaw feather structural colour

Close up macaw feather structural colour

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Credit: PAUL D STEWART/SCIENCE PHOTO LIBRARY

Caption: Structural colour (non pigment colour) of a blue and yellow macaw feather (Ara ararauna) is created by randomly orientated nanochannels in a spongelike keratin matrix. The reflections are not arranged in the same direction giving them bright but not strongly irridescent colours that do not change with angle.

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Keywords: blue, close up, color, deformed matrices, feather, keratin, macaw, nano, nanochannel, nanotechnology, structural, structural colour

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