Thin Films, Surface Roughening, and Surface Alloys
The physically adsorbed or physisorbed layersconsidered thus far are excellent model systems for understanding the thermodynamics of phase equilibria between two- and three-dimensional phases. The relatively weak van der Waals type of bindingof the adsorbed molecules among themselves and with the substrate, as in the cases of rare gases on graphite, results in a high exchange frequencywith the vapor and assures reversibility. The substrate is flat, due to the lamellar structure of graphite, and to the strong covalent bonds within the (0001)-lattice plane, which offers one type of adsorption site.
KeywordsLattice Plane Surface Alloy Foreign Substrate Rough Substrate Ledge Energy
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