INVESTIGADORES
RAMIREZ PASTOR Antonio Jose
artículos
Título:
Adsorption Thermodynamics of Monomers on Diluted-Bonds Triangular Lattices
Autor/es:
M. QUINTANA; P. M. PASINETTI; A. J. RAMIREZ-PASTOR; G. ZGRABLICH
Revista:
SURFACE SCIENCE
Referencias:
Año: 2006 vol. 600 p. 33 - 42
ISSN:
0039-6028
Resumen:
The surface of amorphous solids cannot be usually represented by a regular lattice of adsorbing sites. One of the
main characteristics of such surfaces is a variable connectivity for each site. A simple model consisting of a triangular
lattice where a fraction of bonds (interactions) is suppressed at random is used here to find out, by using Monte Carlo
simulations, how the adsorption thermodynamics of repulsively interacting monomers is modified with respect to the
same process in the regular lattice. Adsorption isotherm, differential heat of adsorption and adsorbed phase entropy
calculations are carried out showing and interpreting the effects of the variable connectivity. In particular, it is found
that the orderdisorder phase transition observed for the regular lattice survives, though with modifications, above a
critical mean connectivity.