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Proceedings Paper

Hard-core liquid-crystal fibers
Author(s): Antoni Adamczyk
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Paper Abstract

Self-organized liquid-crystal filamentary forms arise in many mixtures of the smectogen compounds at the transition from the isotropic melt. In some mixtures, a subsequent phase transition to the crystal or crystal smectic phase occurs at the core of the filaments. The resulting hard-core fibers act as anisotropic cylindrical lenses composed of the crystalline core surrounded by the nematic shell. In this work, the filaments, referred to as nematoids, have been obtained in several binary mixtures based on five mesogens: 4,4'-dipentylazoxybenzene, 4-dodecyloxy-4'- pentylbiphenyl, 4-hexyl-4'nonyloxybiphenyl, 4-acetyl-4'-dodecylbiphenyl and 4''-pentylcyclohexyl 4-(4'- pentylcyclohexyl) benzoate within a silicone oil as an inert liquid. To characterize the molecular arrangements within the nematoids, we present the microinterferometric measurements of the refractive index distribution within the fibers and its changes at the phase transitions.

Paper Details

Date Published: 27 August 2008
PDF: 10 pages
Proc. SPIE 7050, Liquid Crystals XII, 70501A (27 August 2008); doi: 10.1117/12.797063
Show Author Affiliations
Antoni Adamczyk, Warsaw Univ. of Technology (Poland)

Published in SPIE Proceedings Vol. 7050:
Liquid Crystals XII
Iam Choon Khoo, Editor(s)

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