Adsorption thermodynamics of a lattice–gas model with non-additive lateral interactions

In the present paper, we study the adsorption thermodynamics of a lattice–gas model with non-additive interactions between adsorbed particles. We have assumed that the energy which links a certain atom with any of its nearest neighbors strongly depends on the state of occupancy in the first coordina...

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Bibliographic Details
Published in:Surface science 2008-05, Vol.602 (10), p.1763-1769
Main Authors: Pinto, O.A., Ramirez-Pastor, A.J., Nieto, F.
Format: Article
Language:English
Subjects:
Adsorption
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Lattice–gas models
Monte Carlo simulations
Non-additive lateral interactions
Physics
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Summary:In the present paper, we study the adsorption thermodynamics of a lattice–gas model with non-additive interactions between adsorbed particles. We have assumed that the energy which links a certain atom with any of its nearest neighbors strongly depends on the state of occupancy in the first coordination sphere of that adatom. By means of Monte Carlo simulations in the grand canonical ensemble the adsorption isotherms, isothermal susceptibility (or equivalently the mean square density fluctuations of adparticles), and isosteric heat of adsorption were calculated and their striking behavior was analyzed and discussed in terms of the low temperature phases formed in the system.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2008.03.006