Ring patterns in liquid crystals aligned by phase-separated two-component monolayers

    Authors

    T. Bera; W. L. Liang;J. Y. Fang

    Comments

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    Abbreviated Journal Title

    Colloid Surf. A-Physicochem. Eng. Asp.

    Keywords

    Phase-separated organosilane monolayers; Liquid crystal alignments; SELF-ASSEMBLED MONOLAYERS; ORGANOSILANE MONOLAYERS; FLUORESCENCE; MICROSCOPY; MIXED MONOLAYERS; FORCE MICROSCOPY; ATOMIC-FORCE; ALIGNMENT; SURFACES; ADSORPTION; PLANAR; Chemistry, Physical

    Abstract

    We investigate the alignment of 4 '-pentyl-4-cynobiphenyl (5CB) liquid crystal on phase-separated two-component organosilane monolayers that consist of the protruding islands surrounded by a continuous phase. The molecular disordering at the protruding island edge locally perturbs the homeotropic alignment of the 5CB induced the phase-separated monolayers, leading to the formation of ring patterns. The edge effect on the 5CB alignment decreases with the decrease of the height difference between the protruding islands and the surrounding monolayer and increases with the decrease of the size of the protruding islands. (C) 2011 Elsevier B.V. All rights reserved.

    Journal Title

    Colloids and Surfaces a-Physicochemical and Engineering Aspects

    Volume

    395

    Publication Date

    1-1-2012

    Document Type

    Article

    Language

    English

    First Page

    32

    Last Page

    37

    WOS Identifier

    WOS:000300206400005

    ISSN

    0927-7757

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