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We report on the phenomenon that in the two phase coexistence region (LC-LE) of a lipid monolayer film the fractal-like solid domains may grow simply by continuous illumination of a fluorescence microscope. The mechanism of this 2D domain growth is discussed. This phenomenon gives insight into the two-dimensional ramified crystallization in monolayers.
The average molecular orientation in a nematic liquid crystal sample submitted to an external field is analyzed assuming strong anchoring. It is shown that if a small constant pretilt angle at the surface is actually present, an apparent extrapolation length can be measured. This could lead to the conclusion that the anchoring is weak, despite the fact that the anchoring is truly strong. This conclusion...
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