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 language | English |
|---|---|
| Article number | 062507 |
| Journal | Physical Review E - Statistical, Nonlinear, and Soft Matter Physics |
| Volume | 87 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 20 2013 |
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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 journal › Article
}
TY - JOUR
T1 - Interparticle force between different types of nematic colloids
AU - Izaki, Kuniyoshi
AU - Kimura, Yasuyuki
PY - 2013/6/20
Y1 - 2013/6/20
N2 - 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.
AB - 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.
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U2 - 10.1103/PhysRevE.87.062507
DO - 10.1103/PhysRevE.87.062507
M3 - Article
AN - SCOPUS:84879805637
VL - 87
JO - Physical Review E
JF - Physical Review E
SN - 2470-0045
IS - 6
M1 - 062507
ER -