Recent advances in the manipulation of circularly polarised light with cellulose nanocrystal films

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Abstract

Significant advances have been made to control the iridescence and the selective reflection of left circularly polarised (LCP) light, and transmission of right circularly polarised (RCP) light of solid films prepared from cellulose nanocrystals (CNCs). However the manipulation of the photonic properties of the CNCs films, which reflect both RCP and LCP light is less investigated. Solid films prepare from natural sources as CNCs have advantageous characteristics that are absent in other synthetic structures, such as wide availability and renewability. Here we review and compare recent research activity involving the production and characterization of photonic band gap structures resulting from an anisotropic layer inserted between two cholesteric layers with different helical pitches but the same handedness. We make connections between systems existing in Nature and synthetic ones with the hope of advancing in the production and manipulation of CNCs-based photonic structures.

Original languageEnglish
Pages (from-to)63-73
JournalCurrent Opinion in Solid State and Materials Science
Volume23
Issue number2
DOIs
Publication statusPublished - Apr 2019

Keywords

  • Bio-inspired materials
  • Cellulose nanocrystals
  • Circularly polarised light
  • Iridescence
  • Liquid crystals
  • Photonics

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