Force between colloidal particles in a nematic liquid crystal studied by optical tweezers

Kenji Takahashi, Masatoshi Ichikawa, Yasuyuki Kimura

研究成果: Contribution to journalArticle査読

62 被引用数 (Scopus)

抄録

We measure the dependence of the interparticle force F on the distance R between two colloidal particles with hyperbolic hedgehog defects in a nematic liquid crystal using optical tweezers. The particle-defect pair can be regarded as an elastic "dipole" in the electrostatic analogy. In a parallel configuration, where the dipole vectors are parallel with each other, F is attractive and proportional to R-4. However, F becomes repulsive at small R due to the existence of a defect between the particles. In an antiparallel configuration, where the particles directly face each other, F is repulsive over the whole range of R and proportional to R-3.6. In another antiparallel configuration, where two hyperbolic hedgehog defects directly face each other, F is proportional to R-3.6 and F at small R turns out to be attractive upon tilting the dipoles. Furthermore, we yield the force between particles connected by a stringlike defect called a bubblegum defect.

本文言語英語
論文番号020703
ジャーナルPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
77
2
DOI
出版ステータス出版済み - 2 25 2008

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

フィンガープリント 「Force between colloidal particles in a nematic liquid crystal studied by optical tweezers」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル