T. Stoebe et al., SURFACE-TENSION OF FREESTANDING LIQUID-CRYSTAL FILMS, Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 49(5), 1994, pp. 180003587-180003590
A unique system has been developed and used to determine the surface t
ension of free-standing films of three different liquid-crystal compou
nds in the smectic phases. The results obtained have been found to be
in good agreement with the existing experimental data. For one of thes
e compounds, the surface tension has also been found to be independent
of film thickness from over 100 down to only 2 molecular layers.