Monte Carlo study of binary mixtures adsorbed on square lattices |
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Authors: | GD García FO Sánchez-Varretti F Bulnes AJ Ramirez-Pastor |
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Institution: | 1. Dpto. de Física, Instituto de Física Aplicada, Universidad Nacional de San Luis, CONICET, Chacabuco 917, 5700 San Luis, Argentina;2. Universidad Tecnológica Nacional, Regional San Rafael, Gral. Urquiza 314, 5600 San Rafael, Mendoza, Argentina |
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Abstract: | The monolayer adsorption of interacting binary mixtures on 2D square lattices has been studied through grand canonical Monte Carlo simulation in the framework of the lattice-gas model. The process has been monitored through total and partial isotherms and differential heats of adsorption corresponding to both species of the mixture. Repulsive lateral interactions between the adsorbed particles have been considered, resulting in a rich variety of structural orderings in the adlayer. At the end of this work, the phase diagram characterizing the transitions occurring in the system has been determined. A nontrivial interdependence between the partial surface coverage of both species was observed and discussed. |
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