CUED Publications database

Blue-phase templated fabrication of three-dimensional nanostructures for photonic applications

Castles, F and Day, FV and Morris, SM and Ko, DH and Gardiner, DJ and Qasim, MM and Nosheen, S and Hands, PJW and Choi, SS and Friend, RH and Coles, HJ (2012) Blue-phase templated fabrication of three-dimensional nanostructures for photonic applications. Nature Materials, 11. pp. 599-603. ISSN 1476-1122

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A promising approach to the fabrication of materials with nanoscale features is the transfer of liquid-crystalline structure to polymers. However, this has not been achieved in systems with full three-dimensional periodicity. Here we demonstrate the fabrication of self-assembled three-dimensional nanostructures by polymer templating blue phase I, a chiral liquid crystal with cubic symmetry. Blue phase I was photopolymerized and the remaining liquid crystal removed to create a porous free-standing cast, which retains the chiral three-dimensional structure of the blue phase, yet contains no chiral additive molecules. The cast may in turn be used as a hard template for the fabrication of new materials. By refilling the cast with an achiral nematic liquid crystal, we created templated blue phases that have unprecedented thermal stability in the range-125 to 125°C, and that act as both mirrorless lasers and switchable electro-optic devices. Blue-phase templated materials will facilitate advances in device architectures for photonics applications in particular. © 2012 Macmillan Publishers Limited. All rights reserved.

Item Type: Article
Divisions: Div B > Photonics
Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 19:17
Last Modified: 22 Mar 2018 02:00