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

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


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
Issue number28
Publication statusPublished - 2011 Jul 20

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics


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