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Nanomaterials 2016, 6(11), 213; doi:10.3390/nano6110213

Recent Advances in Chiral Nematic Structure and Iridescent Color of Cellulose Nanocrystal Films

Department of Chemistry, McGill University, Montreal, QC H3A 2A7, Canada
Academic Editor: John H. T. Luong
Received: 29 September 2016 / Revised: 4 November 2016 / Accepted: 4 November 2016 / Published: 14 November 2016
(This article belongs to the Special Issue Emerging Applications of Cellulose Nanocrystal and Its Composites)
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Abstract

One unique property of cellulose nanocrystals (CNC) is their property of forming suspensions with chiral nematic order. This order can be preserved in films cast from the suspensions, raising the possibility of applications as photonic materials and templates. However, it has proved difficult to generate uniform, well-ordered chiral nematic materials from CNC. Recently, the importance of kinetic arrest due to gel formation in the later stages of evaporation has been recognized as a key step in film formation. In this brief review, recent developments regarding the structure of chiral nematic suspensions and films as monitored by polarized light microscopy are outlined, and attention is drawn to the importance of shear forces on the self-organization process. View Full-Text
Keywords: cellulose nanocrystals; chiral nematic; polarized light microscopy cellulose nanocrystals; chiral nematic; polarized light microscopy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Gray, D.G. Recent Advances in Chiral Nematic Structure and Iridescent Color of Cellulose Nanocrystal Films. Nanomaterials 2016, 6, 213.

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