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Proceedings Paper

Thickness dependence of forming single crystal by liquid-crystalline blue phase on chemically patterned surface
Author(s): Xiao Li; Jose A. Martinez-Gonzalez; Juan J. de Pablo; Paul Nealey
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Paper Abstract

Topological defects of blue-phase liquid crystals (BPLCs) can be self-assembled into three-dimensional cubic crystalline structures, representing unique ordered states of matter among other liquid crystals. In a recent study, we presented the preparation of stable, macroscopic single-crystal blue phase materials by using chemically-patterned surfaces with binary anchoring and the appropriate geometry to favor a desired crystallographic orientation of the BPLC. Here we study the thickness dependence for chemically patterned surface for the crystal growth of the blue-phase II –which is characterized by a simple cubic crystalline structure, under a thermally controlled process. The hybrid cell used in our work to direct the self-assembly of the BP LCs has a top surface that provides uniform homeotropic anchoring, and a bottom surface with chemical patterns consisting of a stripe array of alternative planar and homeotropic anchoring. There is a spacer in between the two substrates to vary the cell thickness. Under such a process we achieve single crystals of blue-phase II with a [100]-lattice orientation (BPII[100]) that start to nuclei and grow from the pattern surface and propagate through the cell. By changing the cell thickness, we analyze the morphology difference of crystalline BPII[100] on the pattern surface.

Paper Details

Date Published: 8 February 2018
PDF: 9 pages
Proc. SPIE 10555, Emerging Liquid Crystal Technologies XIII, 1055514 (8 February 2018); doi: 10.1117/12.2284807
Show Author Affiliations
Xiao Li, The Univ. of Chicago (United States)
Argonne National Lab. (United States)
Jose A. Martinez-Gonzalez, The Univ. of Chicago (United States)
Univ. Autonoma de San Luis Potosi (Mexico)
Juan J. de Pablo, The Univ. of Chicago (United States)
Argonne National Lab. (United States)
Paul Nealey, The Univ. of Chicago (United States)
Argonne National Lab. (United States)

Published in SPIE Proceedings Vol. 10555:
Emerging Liquid Crystal Technologies XIII
Liang-Chy Chien, Editor(s)

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