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Proceedings Paper

Diluted ferroelectric suspension of Sn2P2S6 nanoparticles in nematic liquid crystal
Author(s): Olexander Buchnev; Anatoliy V. Glushchenko; Yurii Reznikov; Victor Yu. Reshetnyak; Olexander Tereshchenko; John L. West
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Paper Abstract

Long-range forces between ultra-fine particles imbedded in liquid crystal (LC) matrices result in intriguing colloids. Embedded inorganic particles in LC contribute to the properties of the LC matrix. For example, doping of a LC with ferromagnetic particles resulted in a strong enhancement of magnetic properties of the LC. Large (>>µm) colloidal particles form defects in LC matrices due to strong director deformations and ensembles of these particles and defects can form complex structures. Small (<<µm) particles at its high concentration (>2-3% by weight) create almost a rigid LC suspension. Here we show that at low concentrations LC nanocolloids appear similar to a pure LC with no readily apparent evidence of dissolved particles, but possess unique properties. The diluted suspensions are stable, because the small concentration of nanoparticles does not significantly perturb the director field in the LC, and interaction between the particles is weak. At the same time, the nanoparticles share their intrinsic properties with the LC matrix due to the anchoring with the LC. In particular, doping a nematic LC matrix with ferroelectric nanoparticles results in a suspension, which possesses an enhanced dielectric anisotropy and reveals ferroelectric and paraelectric properties inherent to the nanoparticles.

Paper Details

Date Published: 3 December 2003
PDF: 6 pages
Proc. SPIE 5257, Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, (3 December 2003); doi: 10.1117/12.545780
Show Author Affiliations
Olexander Buchnev, Institute of Physics (Ukraine)
Anatoliy V. Glushchenko, Kent State Univ. (United States)
Yurii Reznikov, Institute of Physics (Ukraine)
Victor Yu. Reshetnyak, National Taras Shevchenko Univ. of Kyiv (Ukraine)
Olexander Tereshchenko, Institute of Physics (Ukraine)
John L. West, Kent State Univ. (United States)

Published in SPIE Proceedings Vol. 5257:
Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals
Gertruda V. Klimusheva; Andrey G. Iljin; Sergey A. Kostyukevych, Editor(s)

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