Diffusion-limited aggregates grown on nonuniform substrates

作者：Cornette V; Centres P M; Ramirez Pastor A J; Nieto F^*

来源：Physica A: Statistical Mechanics and Its Applications , 2013, 392(23): 5879-5887.

DOI：10.1016/j.physa.2013.08.019

• Adsorption
• Fractals
• Computer simulations
• Monte Carlo method
• DLA

In the present paper, patterns of diffusion-limited aggregation (DLA) grown on nonuniform substrates are investigated by means of Monte Carlo simulations. We consider a nonuniform substrate as the largest percolation cluster of dropped particles with different structures and forms that occupy more than a single site on the lattice. The aggregates are grown on such clusters, in the range the concentration, p, from the percolation threshold, p(c) up to the jamming coverage, p(j). At the percolation threshold, the aggregates are asymmetrical and the branches are relatively few. However, for larger values of p, the patterns change gradually to a pure DLA. Tiny qualitative differences in this behavior are observed for different k sizes. Correspondingly, the fractal dimension of the aggregates incr

• 出版日期2013-12-1