Optical trapping of colloidal particles and measurement of the defect line tension and colloidal forces in a thermotropic nematic liquid crystal

被引:109
作者
Smalyukh, II [1 ]
Kuzmin, AN
Kachynski, AV
Prasad, PN
Lavrentovich, OD
机构
[1] Kent State Univ, Inst Liquid Crystal, Kent, OH 44242 USA
[2] SUNY Buffalo, Inst Lasers Photon & Biophoton, Buffalo, NY 14260 USA
[3] Kent State Univ, Chem Phys Interdisciplinary Program, Kent, OH 44242 USA
基金
美国国家科学基金会;
关键词
D O I
10.1063/1.1849839
中图分类号
O59 [应用物理学];
学科分类号
摘要
We demonstrate optical trapping and manipulation of transparent microparticles suspended in a thermotropic nematic liquid crystal with low birefringence. We employ the particle manipulation to measure line tension of a topologically stable disclination line and to determine colloidal interaction of particles with perpendicular surface anchoring of the director. The three-dimensional director fields and positions of the particles manipulated by laser tweezers are visualized by fluorescence confocal polarizing microscopy. (C) 2005 American Institute of Physics.
引用
收藏
页码:021913 / 1
页数:3
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