Diffusion of interacting particles in one-dimensional heterogeneous systems

BULNES, F.; RAMIREZ-PASTOR, A.J.; RICCARDO, J.L.; ZGRABLICH, G.

SURFACE SCIENCE

ELSEVIER SCIENCE BV

Lugar: AMSTERDAM; Año: 2006 vol. 600 p. 1917 - 1923

0039-6028

The equilibrium and transport properties of interacting ad-particles on bivariate heterogeneous chains are studied by combining analytical and simulation approaches. Heterogeneity is introduced in the way of patches of shallow and deep adsorbing sites distributed in a deterministic alternating way. Adsorption isotherms and mean-square fluctuations of the surface coverage, as well as the jump and collective diffusion coefficients, are calculated for different values of lateral interactions between ad-particles and substrate heterogeneity. In addition, different elementary jump mechanisms are introduced and their influence in the coverage dependence of the collective diffusion coefficient is investigated. © 2006 Elsevier B.V. All rights reserved.