Boojum and Stripe Textures in Long-Range Orientationally Ordered Monolayers on Solid Substrates

    Authors

    W. L. Liang; T. Bera; X. J. Zhang; A. J. Gesquiere;J. Y. Fang

    Comments

    Authors: contact us about adding a copy of your work at STARS@ucf.edu

    Abbreviated Journal Title

    Langmuir

    Keywords

    SCANNING FORCE MICROSCOPY; LANGMUIR-BLODGETT-FILMS; MOLECULAR TILT; AZIMUTH; LIQUID-CRYSTALS; ATOMIC-FORCE; FLUORESCENCE MICROSCOPY; OPTICAL; AMPLIFICATION; FRICTION ANISOTROPY; PHASE-TRANSITIONS; ACID; Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, ; Multidisciplinary

    Abstract

    Long-range organization of molecular tilt azimuth is a striking feature in monolayers at the air-water interface. We show that the boojum and stripe textures of pentadecanoic acid (PDA) with the continuous variations of molecular tilt azimuth formed at the air-water interface at temperatures lower than room temperature can be preserved after being transferred to glass substrates at low dipping speeds. The long-range tilt order in the transferred boojums and stripes is resolved by frictional force microscopy. at room temperature, suggesting that the tilt order is "frozen" through the interaction of PDA molecules with the glass surface. The transferred stripe structure can be used as a unique alignment layer to induce a continuously azimuthal orientation of nematic liquid crystals.

    Journal Title

    Langmuir

    Volume

    27

    Issue/Number

    3

    Publication Date

    1-1-2011

    Document Type

    Article

    Language

    English

    First Page

    1051

    Last Page

    1055

    WOS Identifier

    WOS:000286485600028

    ISSN

    0743-7463

    Share

    COinS