Growth and morphology in Langmuir monolayersA. Flores1, E. Corvera-Poiré2, C. Garza1 and R. Castillo1
1 Instituto de Física, UNAM - P. O. Box 20-364, D. F., 01000 Mexico
2 Facultad de Química, UNAM - Cd. Universitaria, D. F., 04510 Mexico
received 9 December 2005; accepted 30 March 2006
published online 28 April 2006
We show that domain growth of condensed phases from a metastable phase in Langmuir monolayers presents several stages. At the very beginning, depending on the supersaturation level, structures evolve through a tip-splitting dynamics. If supersaturation levels are high, there is a morphological transition, domains grow with needle tips that show as growth proceeds, side branching. The way in which the instability starts at round domains when a small lateral pressure jump is applied to the monolayer is also shown. A model for a monolayer interacting with the subphase is presented. This model can be related to the theory of dynamic phase transitions, where morphological structures and morphological transitions are predicted.
05.70.Np - Interface and surface thermodynamics.
47.20.Dr - Surface-tension-driven instability.
68.55.Ac - Nucleation and growth: microscopic aspects.
© EDP Sciences 2006