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

I. I. Smalyukh; A. N. Kuzmin; A. V. Kachynski; P. N. Prasad; O. D. Lavrentovich

doi:10.1063/1.1849839

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

I. I. Smalyukh
, A. N. Kuzmin
, A. V. Kachynski
, P. N. Prasad
, O. D. Lavrentovich

Kent State University
SUNY Buffalo

Research output: Contribution to journal › Article › peer-review

116 Scopus citations

Abstract

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.

Original language	English
Article number	021913
Pages (from-to)	021913-1-021913-3
Journal	Applied Physics Letters
Volume	86
Issue number	2
DOIs	https://doi.org/10.1063/1.1849839
State	Published - Jan 10 2005

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10.1063/1.1849839

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abstract = "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.",

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AU - Kuzmin, A. N.

AU - Kachynski, A. V.

AU - Prasad, P. N.

AU - Lavrentovich, O. D.

PY - 2005/1/10

Y1 - 2005/1/10

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AB - 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.

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DO - 10.1063/1.1849839

M3 - Article

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JO - Applied Physics Letters

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

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