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When Chirophotonic Film Meets Wrinkles: Viewing Angle Independent Corrugated Photonic Crystal Paper

Lim, Seok‐In ; Jang, Eunji ; Yu, Dongmin ; Koo, Jahyeon ; Kang, Dong‐Gue ; Lee, Kyung Min ; Godman, Nicholas P. ; McConney, Michael E. ; Kim, Dae‐Yoon ; Jeong, Kwang‐Un

Advanced materials (Weinheim), 2023-01, Vol.35 (1), p.e2206764-n/a [Periódico revisado por pares]

Germany: Wiley Subscription Services, Inc

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  • Título:
    When Chirophotonic Film Meets Wrinkles: Viewing Angle Independent Corrugated Photonic Crystal Paper
  • Autor: Lim, Seok‐In ; Jang, Eunji ; Yu, Dongmin ; Koo, Jahyeon ; Kang, Dong‐Gue ; Lee, Kyung Min ; Godman, Nicholas P. ; McConney, Michael E. ; Kim, Dae‐Yoon ; Jeong, Kwang‐Un
  • Assuntos: angle independence ; Angle of reflection ; Cholesteric liquid crystals ; Interpenetrating networks ; interpenetrating polymer networks ; Materials science ; Optical reflection ; Paints ; photonic crystal papers ; Photonic crystals ; Photopolymerization ; Pitch (inclination) ; Substrates ; Viewing ; Wave reflection ; wrinkle structures
  • É parte de: Advanced materials (Weinheim), 2023-01, Vol.35 (1), p.e2206764-n/a
  • Descrição: Light manipulation strategies of nature have fascinated humans for centuries. In particular, structural colors are of considerable interest due to their ability to control the interaction between light and matter. Here, wrinkled photonic crystal papers (PCPs) are fabricated to demonstrate the consistent reflection of colors regardless of viewing angles. The nanoscale molecular self‐assembly of a cholesteric liquid crystal (CLC) with a microscale corrugated surface is combined. Fully polymerizable CLC paints are uniaxially coated onto a wrinkled interpenetrating polymer network (IPN) substrate. Photopolymerization of the helicoidal nanostructures results in a flexible and free‐standing PCP. The facile method of fabricating the wrinkled PCPs provides a scalable route for the development of novel chirophotonic materials with precisely controlled helical pitch and curvature dimensions. The reflection notch position of the flat PCP shifts to a lower wavelength when the viewing angle increased, while the selective reflection wavelength of wrinkled PCP is remained consistent regardless of viewing angles. The optical reflection of the 1D stripe‐wrinkled PCP is dependent on the wrinkle direction. PCPs with different corrugated directions can be patterned to reduce the angular‐dependent optical reflection of wrinkles. Furthermore, 2D wavy‐wrinkled PCP is successfully developed that exhibit directionally independent reflection of color. 1D stripe and 2D wavy wrinkled photonic crystal paper are fabricated by shear coating on the wrinkled interpenetrating network rubber substrate to reflect the same color regardless of viewing angle. The wrinkled photonic crystal paper can be applied as an anti‐counterfeiting film and wide‐angle monochromatic light reflector.
  • Editor: Germany: Wiley Subscription Services, Inc
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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