Direct observation of domain structure in condensed monolayer phases
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Fluorescence microscopy with polarized excitation allows regions of uniform tilt to be seen within domains of the liquid-condensed phase in monolayers of esters at the air/water interface. Transitions between a tilted and an utilted phase have been observed. Tilt regions within domains form regular six-arm patterns that are analogous to the star defect in films of liquid crystals. It is shown that six-arm stars are to be expected in these monolayers. A second transition has also been observed at lower temperatures. © 1991 The American Physical Society.
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