THERMODYNAMIC CHARACTERIZATION OF A DICHLOROMETHANE-XENON FILM ADSORBED ON (0001) GRAPHITE

Xenon adsorption between 95 and 115 K on graphite pre-plated with a di chloromethane monolayer results in a partial displacement of the pre-a dsorbed layer and in the formation of a two-dimensional (dichlorometha ne-xenon) solution. When the dichloromethane pre-plating is in the sub -monolayer range, a xenon monolayer is condensed on the bare part of t he surface before the composite layer organization. For dichloromethan e coverages greater than a monolayer, kinetic problems arise for the f ormation of xenon bilayer patches, which implies in this case its sepa ration from the two-dimensional solution.