Surface tension of the isotropic-nematic interface

Details Surface tension of the isotropic-nematic interface Surface tension of the isotropic-nematic interface

2000-08-03

arxiv.org/abs/cond-mat/0008056v2

Physics

Condensed Matter

Materials Science

Minor changes; to appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.63.010701

We present the first calculations of the pressure tensor profile in the vicinity of the planar interface between isotropic liquid and nematic liquid crystal, using Onsager's density functional theory and computer simulation. When the liquid crystal director is aligned parallel to the interface, the situation of lowest free energy, there is a large tension on the nematic side of the interface and a small compressive region on the isotropic side. By contrast, for perpendicular alignment, the tension is on the isotropic side. There is excellent agreement between theory and simulation both in the forms of the pressure tensor profiles, and the values of the surface tension.

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