DISSOCIATIVE ADSORPTION ON ROUGH SURFACES WITH DYNAMICALLY CHANGING MORPHOLOGY - A MONTE-CARLO MODEL

A computer model based on the Monte Carlo technique for bimolecular di ssociative adsorption on a rough surface with dynamically changing mor phology is investigated. The model takes into account the mutual influ ence of adsorbed particles and substrate atoms. The common regularitie s of dissociative adsorption on the rough mobile surface in comparison with the Langmuir isotherm are revealed. Particularly, at low tempera tures and when the attraction between adsorbate and substrate is stron g, metastable states with long lifetimes arise, in contrast to the cas e of monomolecular adsorption.