Abstract
The nucleation and growth of liquid condensed domains into a continuous liquid expanded phase has been monitored by epifluorescence microscopy in monolayers of myristic acid mixed with a fluorescent dye. Various patterns, ranging from circular droplets to highly ramified structures, have been observed over a temperature range of a few degrees C around room temperature. This reflects the complexity of the phase diagram of myristic acid monolayers. For instance the existence of a critical temperature T c for the two-phase coexistence region around 31 °C has probably a strong influence on the patterns aspects since the line tension between the liquid expanded and the liquid condensed phases vanishes at T c . We believe that the morphological unstability of the interfacial front is diffusion-controlled, as first predicted by Mullins and Sekerka in binary alloys for the growth of a solid sphere in a uniformly supersaturated melt. On the other hand, thermal diffusion only a small plays role in the present experiments. In the limit of very small line tension, the patterns are self-similar and are characterized by a Hausdorff exponent of 1.8±0.1.
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A brief account of the same experiments can also be found in Suresh KA, Nittmann J, Rondelez F (1988) Europhys Lett 6:437
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© 1989 Dr. Dietrich Steinkopff Verlag GmbH & Co. KG
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Suresh, K.A., Nittmann, J., Rondelez, F. (1989). Pattern growth during the liquid expanded-liquid condensed phase transition in langmuir monolayers of myristic acid. In: Bothorel, P., Dufourc, E.J. (eds) Trends in Colloid and Interface Science III. Progress in Colloid & Polymer Science, vol 79. Steinkopff. https://doi.org/10.1007/BFb0116207
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DOI: https://doi.org/10.1007/BFb0116207
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