Chiral Lyotropic Liquid Crystals: TGB Phases and Helicoidal Structures

Details Chiral Lyotropic Liquid Crystals: TGB Phases and Helicoidal Structures Chiral Lyotropic Liquid Crystals: TGB Phases and Helicoidal Structures

1996-05-20

arxiv.org/abs/cond-mat/9605129v2

J. Phys. II France 7 (1997) 157

Physics

Condensed Matter

10 pages, plain TeX, two included figures, revision corrects figures only

Scientific paper

10.1051/jp2:1997119

The molecules in lyotropic membranes are typically aligned with the surface normal. When these molecules are chiral, there is a tendency for the molecular direction to twist. These competing effects can reach a compromise by producing helicoidal defects in the membranes. Unlike thermotropic smectics, the centers of these defects are hollow and thus their energy cost comes from the line energy of an exposed lamellar surface. We describe both the twist-grain-boundary phase of chiral lamellar phases as well as the isolated helicoidal defects.

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