INVESTIGADORES
SAPAG Manuel Karim
artículos
Título:
Temperature behavior of tracer diffusion on heterogeneous surfaces
Autor/es:
K. SAPAG ; V. PEREYRA; J.L. RICCARDO; G. ZGRABLICH
Revista:
SURFACE SCIENCE
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 1993 vol. 295 p. 433 - 444
ISSN:
0039-6028
Resumen:
The behavior of a tagged particle on a generalized heterogeneous surface is studied by Monte Carlo simulation. Using the dual site-bond model (SBM), the energetic properties of the heterogeneous substrates can be appropriately described through the site and bond energy distributions and the overlapping degree between them. The effect of the adsorptive energy topography on the tracer diffusion coefficient, as well as on the time behavior of the mean-square displacement of the adparticle, are analyzed for different temperatures and energy correlation degrees. The short-time behavior of tracer diffusion is highly sensitive to the surface energy structure. The possibility of using tracer diffusion analysis for a better characterization of the energetic topography of heterogeneous surfaces is discussed.
