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

来源：

APPLIED PHYSICS LETTERS | 2005年 / 86卷 / 02期

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

页码：021913 / 1

页数：3

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