Statistical properties of abnormal nano-sized adsorbate islands growth in a model of adsorptive multilayer system

摘要

A generalized model for nano-sized islands growth in substratum-mediated adsorption multilayer system is proposed. It is shown that the system manifests cascade of first order transitions related to the number of growing atomic layers. We have found that pattern formation on low layers is governed by a rate of adatom transference between neighboring layers. Critical coverage and critical island size governing adsorbate islands formation are defined. Anomalous dynamics of adsorbate island size growth and a crossover of dynamical regimes are discussed. Distributions of adsorbate/vacancy islands over their sizes are studied in details. It is shown that the linear site of vacancy/adsorbate islands varies from 20 to 100 nm. (C) 2015 Elsevier B.V. All rights reserved.