Diluted ferroelectric suspension of Sn2P2S6 nanoparticles in nematic liquid crystal

Olexander Buchnev; Anatoliy V. Glushchenko; Yurii Reznikov; Victor Yu. Reshetnyak; Olexander Tereshchenko; John L. West

doi:10.1117/12.545780

3 December 2003 Diluted ferroelectric suspension of Sn₂P₂S₆ nanoparticles in nematic liquid crystal

Olexander Buchnev, Anatoliy V. Glushchenko, Yurii Reznikov, Victor Yu. Reshetnyak, Olexander Tereshchenko, John L. West

Proceedings Volume 5257, Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals; (2003) https://doi.org/10.1117/12.545780
Event: 2003 Chapter books, 2003, Bellingham, WA, United States

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.

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Olexander Buchnev, Anatoliy V. Glushchenko, Yurii Reznikov, Victor Yu. Reshetnyak, Olexander Tereshchenko, and John L. West "Diluted ferroelectric suspension of Sn₂P₂S₆ nanoparticles in nematic liquid crystal", Proc. SPIE 5257, Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals, (3 December 2003); https://doi.org/10.1117/12.545780

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