Multilayer Adsorption of Interacting Polyatomics on Heterogeneous Surfaces

Details Multilayer Adsorption of Interacting Polyatomics on Heterogeneous Surfaces Multilayer Adsorption of Interacting Polyatomics on Heterogeneous Surfaces

2011-05-23

arxiv.org/abs/1105.4520v1

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

In the present work we introduce a generalized lattice-gas model to study the multilayer adsorption of interacting polyatomics on heterogeneous surfaces. Using an approximation in the spirit of the well-known Brunauer--Emmet--Teller (BET) model, a new theoretical isotherm is obtained in one- and two-dimensional lattices and compared with Monte Carlo simulation. In addition, we use the BET approach to analyze these isotherms and to estimate the monolayer volume. In all cases, we found that the use of the BET equation leads to an underestimate of the true monolayer capacity. However, significant compensation effects were observed for heterogeneous surfaces and attractive lateral interactions.

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