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Filling and wetting transitions on sinusoidal substrates: a mean-field study of the Landau-Ginzburg model

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Autor: Rodríguez Rivas, Álvaro
Romero Enrique, José Manuel
Galván, José
Departamento: Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Universidad de Sevilla. Departamento de Física Aplicada II
Fecha: 2014
Publicado en: Journal of Physics: Condensed Matter, 23 (3), 1-22.
Tipo de documento: Artículo
Resumen: We study the interfacial phenomenology of a fluid in contact with a one-dimensional array of infinitely long grooves of sinusoidal section, characterized by the periodicity length L and amplitude A. The system is modelled by the Landau–Ginzburg–Wilson functional, with fluid-substrate couplings which control the wettability of the substrate. We investigate the filling and wetting phenomena within the mean-field approximation, and compare with the predictions of the macroscopic and interfacial Hamiltonian theories. For large values of L and under bulk coexistence conditions, we observe first-order filling transitions between dry (D) and partially filled (F) interfacial states, and wetting transitions between partially filled F and completely wet (W) interfacial states of the same order as for the flat substrate. Depending on the order of the wetting transition, the transition temperature is either shifted towards lower temperatures for first-order wetting or it coincides with the wettin...
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Cita: Rodríguez Rivas, Á., Romero Enrique, J.M. y Galván, J. (2014). Filling and wetting transitions on sinusoidal substrates: a mean-field study of the Landau-Ginzburg model. Journal of Physics: Condensed Matter, 23 (3), 1-22.
Tamaño: 1.309Mb
Formato: PDF

URI: http://hdl.handle.net/11441/64563

DOI: 10.1088/0953-8984/27/3/035101

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