Effect of nanoparticle chain formation on dielectric anisotropy of nematic composites

M. A. Osipov, M. V. Gorkunov

Research output: Contribution to journalArticle

14 Citations (Scopus)
39 Downloads (Pure)

Abstract

A general theory of the dielectric constant of nematic liquid crystal mixtures is presented including the particular case of nematics doped with polar nanoparticles. The results are used to estimate the contribution of chains of polar nanoparticles to the static dielectric anisotropy and birefringence of the nematic composite taking into account contributions from chains of different lengths. The dependence of the dielectric anisotropy on the dipolar interaction strength is considered in detail and it is shown that formation of polar chains of nanoparticles enables one to explain a significant increase of the dielectric constant of the composite as observed experimentally.

Original languageEnglish
Article number032501
Number of pages8
JournalPhysical Review E
Volume92
Issue number3
DOIs
Publication statusPublished - 3 Sep 2015

    Fingerprint

Keywords

  • anisotropy
  • chains
  • liquid crystals
  • nematic liquid crystals
  • dielectric anisotropies
  • dipolar interaction
  • general theory
  • nanoparticle chains
  • nematic liquid crystal mixtures
  • nematics
  • polar chain

Cite this