Systematic model behavior of adsorption on flat surfaces.
A low density film on a flat surface is described by an expansion involving the first four virial coefficients. The first coefficient (alone) yields the Henry's law regime, while the next three terms in the expansion correct for the effects of adsorbate-adsorbate interactions, computed within the two-dimensional approximation (a film confined nearly to a plane). The results permit exploration of the idea of universal adsorption behavior, which is compared with experimental data for a number of systems. The idea works well, in general, justifying a general model of adsorption at low to moderate coverage.
Trasca
R A
RA
Department of Physics, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
Cole
M W
MW
Diehl
R D
RD