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      Structural coloring in large scale core-shell nanowires

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      Author
      Khudiyev, T.
      Ozgur E.
      Yaman, M.
      Bayındır, Mehmet
      Date
      2011
      Source Title
      Nano Letters
      Print ISSN
      1530-6984
      Publisher
      American Chemical Society
      Volume
      11
      Issue
      11
      Pages
      4661 - 4665
      Language
      English
      Type
      Article
      Item Usage Stats
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      126
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      Abstract
      We demonstrated two complementary size-dependent structural coloring mechanisms, interference and scattering, in indefinitely long core-shell nanowire arrays. The unusual nanostructures are comprised of an amorphous semiconducting core and a polymer shell layer with disparate refractive indices but with similar thermomechanical properties. Core-shell nanowires are mass produced from a macroscopic semiconductor rod by using a new top-to-bottom fabrication approach based on thermal size reduction. Nanostructures with diameters from 30 to 200 nm result in coloration that spans the whole visible spectrum via resonant Mie scattering. Nanoshell coloration based on thin film interference is proposed as a structural coloration mechanism which becomes dominant for nanowires having 700-1200 nm diameter. Controlled color generation in any part of visible and infrared spectral regions can be achieved by the simple scaling down procedure. Spectral color generation in mass-produced uniform core-shell nanowire arrays paves the way for applications such as spectral authentication at nanoscale, light-scattering ingredients in paints and cosmetics, large-area devices, and infrared shielding. © 2011 American Chemical Society.
      Keywords
      Top-to-bottom approach
      Thermal size reduction
      Core-shell nanowires
      Thin-film interference
      Structural coloring
      Resonant Mie scattering
      color
      Permalink
      http://hdl.handle.net/11693/21720
      Published Version (Please cite this version)
      http://dx.doi.org/10.1021/nl2022114
      Collections
      • Department of Physics 2299
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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