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Calorimetric and optical reflectivity studies on free-standing partially fluorinated liquid-crystal films have revealed novel melting phenomena. The smectic-A-isotropic transition occurs through a series of layer-thinning transitions, causing the films to thin in a stepwise manner as the temperature is increased. The temperature dependence of the film thickness has been found to be well fitted by a simple power law. These results are discussed in the context of present theory and the effects of fluorination are addressed.
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Stoebe et al. (1994) studied this question.
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