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Transient Ordered States In A Model Reaction On A Surface With Active Sites

Author

Listed:
  • J. J. LUQUE

    (Departamento de Física de la Materia Condensada, Universidad de Sevilla, Apartado 1065, Sevilla 41080, Spain)

  • V. MAESTRO

    (Departamento de Física de la Materia Condensada, Universidad de Sevilla, Apartado 1065, Sevilla 41080, Spain)

  • A. LÓZAR

    (Departamento de Física de la Materia Condensada, Universidad de Sevilla, Apartado 1065, Sevilla 41080, Spain)

  • A. CÓRDOBA

    (Departamento de Física de la Materia Condensada, Universidad de Sevilla, Apartado 1065, Sevilla 41080, Spain)

Abstract

A model for the monomer–monomer surface reaction of the typeA + B → AB, with diffusion ofAandBmonomers on a surface and reaction only on active sites randomly distributed on the surface, has been proposed and studied. For a critical point where both adsorption probabilities are the same, a seemingly reactive steady state transforms itself into a poisoned state. In this transient state, the production ofABmolecules, in relation to the density of active sites, is considered and an inert-reactive irreversible phase transition is observed. The critical values of the density of active sites, where the irreversible phase transition occurs, is obtained in the limitL → ∞by means of a finite-size scaling analysis. The critical exponents that dominate the correlation length of clusters, as well as the production ofABmolecules at criticality, are determined.

Suggested Citation

  • J. J. Luque & V. Maestro & A. Lózar & A. Córdoba, 2003. "Transient Ordered States In A Model Reaction On A Surface With Active Sites," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 14(02), pages 159-167.
    • Handle: RePEc:wsi:ijmpcx:v:14:y:2003:i:02:n:s0129183103004358
    DOI: 10.1142/S0129183103004358
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