Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 44, 2018
Previous Article Next Article

Polymer stabilization of cholesteric liquid crystals in the oblique helicoidal state

Author affiliations

Abstract

Electrical control of the pitch has been reported in a variant of the cholesteric liquid crystal phase composed of chiral dopants and liquid crystal dimers with a bent conformation, such as CB7CB. For a finite range of applied electric field, the dimeric mesogens assume an oblique helicoidal structure, in which the helical axis is aligned along the electric field and the local director is tilted towards the helical axis (rather than being perpendicular to it). An electric field can directly regulate the periodicity (pitch), allowing reconfiguration of the optical response from a scattering or transparent state to a reflective state. Here, we employ po stabilization to retain the oblique helicoidal state absent an applied field. The polymer stabilized oblique helicoidal structures were investigated under various conditions and material compositions. With polymer stabilization, the magnitude of the selective reflection is found to be dependent on the strength of the applied field. Comparison of the electro-optical response of samples with and without a polymer network elucidates the relative role of boundary conditions, anchoring strength, and elastic energy on the stability of the oblique helicoidal state.

Graphical abstract: Polymer stabilization of cholesteric liquid crystals in the oblique helicoidal state

Back to tab navigation

Article information


Submitted
22 Jun 2018
Accepted
31 Aug 2018
First published
04 Sep 2018

Soft Matter, 2018,14, 8883-8894
Article type
Paper
Author version available

Polymer stabilization of cholesteric liquid crystals in the oblique helicoidal state

M. Rumi, T. J. Bunning and T. J. White, Soft Matter, 2018, 14, 8883
DOI: 10.1039/C8SM01278D

Social activity

Search articles by author

Spotlight

Advertisements