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Issue 43, 2015
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Templated blue phases

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Cholesteric blue phases of a chiral liquid crystal are interesting examples of self-organised three-dimensional nanostructures formed by soft matter. Recently it was demonstrated that a polymer matrix introduced by photopolymerization inside a bulk blue phase not only stabilises the host blue phase significantly, but also serves as a template for blue phase ordering. We show with numerical modelling that the transfer of the orientational order of the blue phase to the surfaces of the polymer matrix, together with the resulting surface anchoring, can account for the templating behaviour of the polymer matrix inducing the blue phase ordering of an achiral nematic liquid crystal. Furthermore, tailoring the anchoring conditions of the polymer matrix surfaces can bring about orientational ordering different from those of bulk blue phases, including an intertwined complex of the polymer matrix and topological line defects of orientational order. Optical Kerr response of templated blue phases is explored, finding large Kerr constants in the range of K = 2–10 × 10−9 m V−2 and notable dependence on the surface anchoring strength. More generally, the presented numerical approach is aimed to clarify the role and actions of templating polymer matrices in complex chiral nematic fluids, and further to help design novel template-based materials from chiral liquid crystals.

Graphical abstract: Templated blue phases

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Article information

28 Jul 2015
17 Sep 2015
First published
17 Sep 2015

This article is Open Access

Soft Matter, 2015,11, 8417-8425
Article type
Author version available

Templated blue phases

M. Ravnik and J. Fukuda, Soft Matter, 2015, 11, 8417
DOI: 10.1039/C5SM01878A

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