Non-equilibrium dynamics of 2D liquid crystals driven by transmembrane gas flow

Kazuyoshi Seki, Ken Ueda, Yu Ichi Okumura, Yuka Tabe

    Research output: Contribution to journalArticle

    10 Citations (Scopus)

    Abstract

    Free-standing films composed of several layers of chiral smectic liquid crystals (SmC*) exhibited unidirectional director precession under various vapor transfers across the films. When the transferred vapors were general organic solvents, the precession speed linearly depended on the momentum of the transmembrane vapors, where the proportional constant was independent of the kind of vapor. In contrast, the same SmC* films under water transfer exhibited precession in the opposite direction. As a possible reason for the rotational inversion, we suggest the competition of two origins for the torques, one of which is microscopic and the other macroscopic. Next, we tried to move an external object by making use of the liquid crystal(LC) motion. When a solid or a liquid particle was set on a film under vapor transfer, the particle was rotated in the same direction as the LC molecules. Using home-made laser tweezers, we measured the force transmitted from the film to the particle, which we found to be several pN.

    Original languageEnglish
    Article number284114
    JournalJournal of Physics Condensed Matter
    Volume23
    Issue number28
    DOIs
    Publication statusPublished - 2011 Jul 20

    Fingerprint

    Liquid Crystals
    Liquid crystals
    gas flow
    Flow of gases
    Gases
    Vapors
    liquid crystals
    vapors
    precession
    Smectic liquid crystals
    Optical Tweezers
    Torque
    Organic solvents
    torque
    Momentum
    Water
    inversions
    momentum
    Molecules
    Lasers

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Materials Science(all)
    • Medicine(all)

    Cite this

    Non-equilibrium dynamics of 2D liquid crystals driven by transmembrane gas flow. / Seki, Kazuyoshi; Ueda, Ken; Okumura, Yu Ichi; Tabe, Yuka.

    In: Journal of Physics Condensed Matter, Vol. 23, No. 28, 284114, 20.07.2011.

    Research output: Contribution to journalArticle

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