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Issue 16, 2012
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Periodic lattices of frustrated focal conic defect domains in smectic liquid crystal films

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Abstract

We have created periodic lattices of close-packed non-toroidal focal conic domains (FCD) in smectic A liquid crystal films deposited on solid substrates that induce unidirectional planar anchoring, at the interface with air which induces homeotropic anchoring. Each cell of the quasi-hexagonal lattice contained a FCD with an eccentric ellipse aligned with the planar anchoring direction and tilted from the solid substrate towards the free interface. In contrast to common toroidal FCDs, the ellipse was truncated by both the substrate and the free interface, and its longest portions were virtual. Such geometry results from a complex balance between the distortion of the smectic layers, anchoring and surface tension achieved through multiple frustrations of the smectic layered structure and anchoring at the interfaces, and creation of additional defects at the boundaries between neighbouring FCDs in the lattice.

Graphical abstract: Periodic lattices of frustrated focal conic defect domains in smectic liquid crystal films

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Article information


Submitted
18 Nov 2011
Accepted
09 Jan 2012
First published
22 Feb 2012

Soft Matter, 2012,8, 4318-4326
Article type
Paper

Periodic lattices of frustrated focal conic defect domains in smectic liquid crystal films

B. Zappone, C. Meyer, L. Bruno and E. Lacaze, Soft Matter, 2012, 8, 4318
DOI: 10.1039/C2SM07207F

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