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Cellulose nanocrystal-based materials: from liquid crystal self-assembly and glass formation to multifunctional thin films

NPG Asia materials, 2014-01, Vol.6 (1), p.e80-e80 [Peer Reviewed Journal]

Copyright Nature Publishing Group Jan 2014 ;ISSN: 1884-4049 ;ISSN: 1884-4057 ;EISSN: 1884-4057 ;DOI: 10.1038/am.2013.69

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  • Title:
    Cellulose nanocrystal-based materials: from liquid crystal self-assembly and glass formation to multifunctional thin films
  • Author: Lagerwall, Jan P F ; Schütz, Christina ; Salajkova, Michaela ; Noh, JungHyun ; Hyun Park, Ji ; Scalia, Giusy ; Bergström, Lennart
  • Subjects: Cellulose ; cholesteric ; Computer numerical control ; gel ; glass ; Glass formation ; Helical ; liquid crystal ; Liquid crystals ; materialkemi ; Materials Chemistry ; nanocellulose ; Nanocrystals ; Obstacles ; photonic crystal ; Self assembly ; Thin films
  • Is Part Of: NPG Asia materials, 2014-01, Vol.6 (1), p.e80-e80
  • Description: Cellulose nanocrystals (CNCs), produced by the acid hydrolysis of wood, cotton or other cellulose-rich sources, constitute a renewable nanosized raw material with a broad range of envisaged uses: for example, in composites, cosmetics and medical devices. The intriguing ability of CNCs to self-organize into a chiral nematic (cholesteric) liquid crystal phase with a helical arrangement has attracted significant interest, resulting in much research effort, as this arrangement gives dried CNC films a photonic band gap. The films thus acquire attractive optical properties, creating possibilities for use in applications such as security papers and mirrorless lasing. In this critical review, we discuss the sensitive balance between glass formation and liquid crystal self-assembly that governs the formation of the desired helical structure. We show that several as yet unclarified observations--some constituting severe obstacles for applications of CNCs--may result from competition between the two phenomena. Moreover, by comparison with the corresponding self-assembly processes of other rod-like nanoparticles, for example, carbon nanotubes and fd virus particles, we outline how further liquid crystal ordering phenomena may be expected from CNCs if the suspension parameters can be better controlled. Alternative interpretations of some unexpected phenomena are provided, and topics for future research are identified, as are new potential application strategies.
  • Publisher: Tokyo: Nature Publishing Group
  • Language: English
  • Identifier: ISSN: 1884-4049
    ISSN: 1884-4057
    EISSN: 1884-4057
    DOI: 10.1038/am.2013.69
  • Source: Nature Open Access
    SWEPUB Freely available online
    ProQuest Central
    DOAJ Directory of Open Access Journals
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