Pattern formation in the A + B_2 reaction with anisotropic lateral adsorbate-adsorbate interactions

摘要

We present Monte Carlo simulations of the formation of (1 * 2) islands in the case of the 2A + B_2 → 2AB reaction occurring via the Langmuir-Hinshelwood mechanism on a square lattice under steady-state conditions. The model employed takes into account the effect of anisotropic lateral B-B interactions on the rates of B diffusion and elementary reaction events. The results obtained with qualitatively realistic ratio of the rate of elementary reaction steps indicate that the average island size depends on the details of diffusion and reaction dynamics in a similar way as in the earlier studied case of the simplest A + B reaction running via the Eley-Rideal mechanism.