List of records in nano database
||Photonic crystal type structures of biological
origin: Structural and spectral characterization
||Current Applied Physics
||Koreai-magyar nano workshop, 24-27 January 2005
||Photonic crystal type structures of biological origin were investigated by scanning electron microscopy (SEM) and UV�VIS
reflectance measurements. It was demonstrated that despite the moderate refractive index contrast between chitin and air, biological
evolution developed in the wing scale nanostructures of butterflies representing various families, numerous structures with different
hues of blue and very different degrees of directionality. Furthermore, for illustrating the variety of purposes for which nature may
use photonic structures, the UV protection mechanism of the high altitude flower Edelweiss has been investigated. We present fully
supportive data that the protection mechanism is based on coupling by nanostructured, highly selective couplers the harmful UV
radiation in propagating modes along fibers containing UV absorbing pigment.
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