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Issue 45, 2015
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Colloidal spirals in nematic liquid crystals

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Abstract

One of the central experimental efforts in nematic colloids research aims to explore how the interplay between the geometry of particles along with the accompanying nematic director deformations and defects around them can provide a means of guiding particle self-assembly and controlling the structure of particle-induced defects. In this work, we design, fabricate, and disperse low-symmetry colloidal particles with shapes of spirals, double spirals, and triple spirals in a nematic fluid. These spiral-shaped particles, which are controlled by varying their surface functionalization to provide tangential or perpendicular boundary conditions of the nematic molecular alignment, are found inducing director distortions and defect configurations with non-chiral or chiral symmetry. Colloidal particles also exhibit both stable and metastable multiple orientational states in the nematic host, with a large number of director configurations featuring both singular and solitonic nonsingular topological defects accompanying them, which can result in unusual forms of colloidal self-assembly. Our findings directly demonstrate how the symmetry of particle-generated director configurations can be further lowered, or not, as compared to the low point group symmetry of solid micro-inclusions, depending on the nature of induced defects while satisfying topological constraints. We show that achiral colloidal particles can cause chiral symmetry breaking of elastic distortions, which is driven by complex three-dimensional winding of induced topological line defects and solitons.

Graphical abstract: Colloidal spirals in nematic liquid crystals

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Publication details

The article was received on 23 Jun 2015, accepted on 03 Sep 2015 and first published on 04 Sep 2015


Article type: Paper
DOI: 10.1039/C5SM01539A
Citation: Soft Matter, 2015,11, 8758-8767
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    Colloidal spirals in nematic liquid crystals

    B. Senyuk, M. B. Pandey, Q. Liu, M. Tasinkevych and I. I. Smalyukh, Soft Matter, 2015, 11, 8758
    DOI: 10.1039/C5SM01539A

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