Interparticle force between different types of nematic colloids

Kuniyoshi Izaki, Yasuyuki Kimura

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We have studied the interparticle force between colloidal particles with three different types of defects in nematic liquid crystal by dual-beam optical tweezers. The force between a dipole (D)- and a Saturn-ring (S)-type particle at large interparticle distance R is proportional to R-4.95 ±0.05. The force between a D- and a planar (P)-type particle and that between an S- and a P-type particle are, respectively, proportional to R-5.04±0.08 and R-5.78 ±0.13. The observed dependence of the interparticle force on R at large R is in agreement with that predicted by electrostatic analogy. The topological quadrupole moments for S and P particles are evaluated from experimental data. We have also studied the force curves in oblique arrangement against the far-field director for respective pairs. The experimental force curves at large R quantitatively agree with those predicted by electrostatic analogy, but they always become attractive at small R due to the reorientation and deformation of defects. The force profiles for the S-P pair are also compared with those obtained by the recent numerical simulation.

Original languageEnglish
Article number062507
JournalPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume87
Issue number6
DOIs
Publication statusPublished - Jun 20 2013

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Colloids
colloids
Electrostatics
Analogy
Defects
Directly proportional
electrostatics
Saturn rings
Optical Tweezers
Curve
defects
Nematic Liquid Crystal
curves
Oblique
Far Field
Dipole
retraining
far fields
Arrangement
quadrupoles

All Science Journal Classification (ASJC) codes

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

Cite this

Interparticle force between different types of nematic colloids. / Izaki, Kuniyoshi; Kimura, Yasuyuki.

In: Physical Review E - Statistical, Nonlinear, and Soft Matter Physics, Vol. 87, No. 6, 062507, 20.06.2013.

Research output: Contribution to journalArticle

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