Dependence of interparticle force on temperature and cell thickness in nematic colloids

Noboru Kondo, Yasutaka Iwashita, Yasuyuki Kimura

研究成果: Contribution to journalArticle査読

15 被引用数 (Scopus)

抄録

We have experimentally studied the interparticle force between two particles accompanied by hyperbolic hedgehog defects in a nematic liquid crystal. The force F was measured with dual-beam optical tweezers at various temperatures and in cells with various thicknesses. In a thick cell, the dependence of F on the interparticle distance R obtained at different temperatures can be scaled to a universal curve of F∼R-4 for R>3a, where a is the radius of a particle. The effective elastic constant evaluated from F is found to be in good agreement with splay constant of the nematic liquid crystal. In a thin cell, the magnitude of F decreases and the dependence of F on R becomes short-ranged as the thickness of a cell, L, decreases. The reduced force curves, F L4 against R/L, at different L are found to be scaled to a single theoretical curve which has been proposed recently.

本文言語英語
論文番号020701
ジャーナルPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
82
2
DOI
出版ステータス出版済み - 8 18 2010

All Science Journal Classification (ASJC) codes

  • 統計物理学および非線形物理学
  • 統計学および確率
  • 凝縮系物理学

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