<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>Wilts, Bodo D.</dc:creator>
  <dc:creator>Saranathan, Vinodkumar</dc:creator>
  <dc:date>2018</dc:date>
  <dc:description xmlns:ns0="xml" ns0:lang="en">The brilliant colors of many insects arise from the interference of incident light with  complex nanostructured biomaterials that are present in their cuticle. Here, the  rainbow‐colored spots on the elytra of a snout weevil, Pachyrrhynchus congestus  pavonius (Coleoptera: Curculionidae), are investigated using synchrotron small‐angle  X‐ray scattering, scanning electron microscopy, microspectrophotometry, and photonic  bandgap modeling. It is shown that the iridescent scales present in the rainbow‐hued  spots are due to a 3D photonic crystal network of chitin in air with a single diamond  (Fd‐3m) symmetry. In many insects, different orientations of photonic crystal domains  are used to create various hues. In this weevil, however, both the chitin volume  fractions as well as the lattice parameters of the biologically self‐assembled single  diamond nanostructure are varied to achieve the remarkable tuning of the structural  colors across the visible light spectrum on a scale‐by‐scale basis. Uncovering the  precise mechanism of color tuning employed by this weevil has important implications  for further structural and developmental research on biophotonic nanostructures and  may provide fresh impetus for bioinspired and biomimetic multifunctional applications,  as synthesis of photonic crystals at visible length scales is currently challenging.</dc:description>
  <dc:format>application/pdf</dc:format>
  <dc:identifier>https://folia.unifr.ch/global/documents/308038</dc:identifier>
  <dc:identifier>https://folia.unifr.ch/documents/308038/files/wit_ler.pdf</dc:identifier>
  <dc:identifier>https://folia.unifr.ch/documents/308038/files/wit_ler_sm.pdf</dc:identifier>
  <dc:language>eng</dc:language>
  <dc:relation>info:eu-repo/semantics/altIdentifier/doi/10.1002/smll.201802328</dc:relation>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>License undefined</dc:rights>
  <dc:source>Small. - 2018, vol. 14, no. 46, p. 1802328</dc:source>
  <dc:subject xmlns:ns1="xml" ns1:lang="en">biophotonics</dc:subject>
  <dc:subject xmlns:ns2="xml" ns2:lang="en">tunable colors</dc:subject>
  <dc:subject xmlns:ns3="xml" ns3:lang="en">single diamond biophotonic crystals</dc:subject>
  <dc:subject xmlns:ns4="xml" ns4:lang="en">structurally colored weevils</dc:subject>
  <dc:subject xmlns:ns5="xml" ns5:lang="en">iridescent biological displays</dc:subject>
  <dc:subject>info:eu-repo/classification/udc/54</dc:subject>
  <dc:title xmlns:ns6="xml" ns6:lang="en">A literal elytral rainbow: tunable structural colors using single diamond biophotonic crystals in Pachyrrhynchus congestus weevils</dc:title>
  <dc:type>http://purl.org/coar/resource_type/c_6501</dc:type>
</oai_dc:dc>