Microstructure-Stabilized Blue Phase Liquid Crystals

Lin, Jia-De, Ho, Daniel, Chen, Lifeng, Lopez-Garcia, Martin, Jiang, Shun-An, Taverne, Mike P. C., Lee, Chia-Rong and Rarity, John G. (2018) Microstructure-Stabilized Blue Phase Liquid Crystals. ACS Omega, 3 (11). pp. 15435-15441. ISSN 2470-1343

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Official URL: http://dx.doi.org/10.1021/acsomega.8b01749

Abstract

We show that micron-scale two-dimensional (2D) honeycomb microwells can significantly improve the stability of blue phase liquid crystals (BPLCs). Polymeric microwells made by direct laser writing improve various features of the blue phase (BP) including a dramatic extension of stable temperature range and a large increase both in reflectivity and thermal stability of the reflective peak wavelength. These results are mainly attributed to the omnidirectional anchoring of the isotropically oriented BP molecules at the polymer walls of the hexagonal microwells and at the top and bottom substrates. This leads to an omnidirectional stabilization of the entire BPLC system. This study not only provides a novel insight into the mechanism for the BP formation in the 2D microwell but also points to an improved route to stabilize BP using 2D microwell arrays.

Item Type: Article
Uncontrolled Keywords: blue phase liquid crystals, chiral materials, direct laser writing, photonic bandgaps
Subjects: H600 Electronic and Electrical Engineering
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Paul Burns
Date Deposited: 12 Sep 2019 11:04
Last Modified: 11 Oct 2019 13:04
URI: http://nrl.northumbria.ac.uk/id/eprint/40656

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