Microscopic characterisation of self-assembled colloidal particles in electrohydrodynamic convection of a low-birefringence nematic liquid crystal

Yoriaki Nishioka, Fumiaki Kobayashi, Nobutaka Sakurai, Yuji Sasaki, Hiroshi Orihara

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

ABSTRACT: Electrokinetics of small particles immersed in anisotropic fluids is attracting attention in recent years. Here we focus on microscopic appearance of single as well as self-assembled particles moving in the electrohydrodynamic convection (EHC) of a nematic liquid crystal with low birefringence. Characterisation of the birefringent properties is made by polarised light microscopy under different illumination conditions. Because of the small optical anisotropy, the director distortion around the particles clearly exhibits distinctive colours on both sides depending on the height in the cell. The observation can be explained as the change in the net phase retardation of the light. It is also found that a caterpillar-like motion is possible by tuning temperature, although the horizontal size of the EHC rolls is relatively narrow.

Original languageEnglish
Pages (from-to)427-435
Number of pages9
JournalLiquid Crystals
Volume43
Issue number4
DOIs
Publication statusPublished - Mar 15 2016
Externally publishedYes

All Science Journal Classification (ASJC) codes

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

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