Suppressed ionic effect and low-frequency texture transitions in a cholesteric liquid crystal doped with graphene nanoplatelets

Po Chang Wu, Longin N. Lisetski, Wei Lee

Research output: Contribution to journalArticle

29 Scopus citations

Abstract

We focus on investigating the dielectric behaviors and the lowfrequency texture transitions in a cholesteric liquid crystal (CLC) doped with graphene nanoplatelets (GNPs) by means of dielectric spectroscopy and measurements of electro-optical responses. The experimental results indicate that incorporating GNPs at a content of 0.5 wt% into the CLC leads to significant suppression of ionic behaviors, as manifested by the reduction in ionic density, diffusivity, and relaxation frequency. In addition, the electro-optical properties of the GNP-doped CLC cell show the lowered operation voltage for the switching from the planar to focal conic state and the absence of the low-frequency focal-conic-to-uniform-lying-helix texture transition. Such results are attributable to the effects of GNPs as nuclei in the CLC medium, giving rise to the repression of the ionic and electrohydrodynamic effects.

Original languageEnglish
Pages (from-to)11195-11204
Number of pages10
JournalOptics Express
Volume23
Issue number9
DOIs
StatePublished - 4 May 2015

Fingerprint Dive into the research topics of 'Suppressed ionic effect and low-frequency texture transitions in a cholesteric liquid crystal doped with graphene nanoplatelets'. Together they form a unique fingerprint.

  • Cite this