Dynamics of electric field induced deformations in flexoelectric nematic layers

G. Derfel, M. Buczkowska

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

The dynamics of deformations induced by DC electrical fields in homeotropically aligned layers containing a flexoelectric nematic material with negative dielectric anisotropy has been studied numerically. The rise time constants, characterising the development of deformations after switching on the external voltage, and the decay time constants, describing the decay of deformation after switching off the voltage, were calculated as a function of the parameters essential for the behaviour of the layer. In particular, the influence of flexoelectricity was studied. It was found that the stronger the flexoelectric properties of the nematic, the lower is its viscosity, the higher is the bias voltage, the weaker is the surface anchoring, the thinner is the layer and the higher is the ion concentration, the more rapid was the onset of deformation. Similarly, the lower the viscosity, the thinner is the layer, the stronger the anchoring and the larger the ion content, the more rapid was the decay of deformation. Neither the voltage previously applied nor the flexoelectric properties were found to affect the decay time.

Original languageEnglish
Pages (from-to)272-280
Number of pages9
JournalLiquid Crystals
Volume40
Issue number2
DOIs
StatePublished - 1 Feb 2013
Externally publishedYes

Keywords

  • director deformation
  • director dynamics
  • flexoelectricity
  • nematic

ASJC Scopus subject areas

  • Chemistry (all)
  • Materials Science (all)
  • Condensed Matter Physics

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