Abstract We have studied the aggregation of particles on a hetero-substrate consisting of two different substrates A and B with finite surface barriers $E_{\rm AB}$ and $E_{\rm BA}$ between the AB and BA boundaries, respectively. With the diffusion energy limited aggregation (DELA) model, we find that the number of clusters and the mean radius of gyration of the clusters are dependent on the surface barriers $E_{\rm AB}$ and $E_{\rm BA}$. For the case with a constant of $E_{\rm BA}$, a series of minima are summarized as $E_{\rm AB }= (E_{0 }- k_{\rm BA }E_{\rm BA })/ k_{\rm AB}$ with $k_{\rm AB}$ and $k_{\rm BA}$ being two integers, for main minima ($k_{\rm BA}=k_{\rm AB}- 1$) and two local minima ($k_{\rm BA}=k_{\rm AB}$ and $k_{\rm BA}=k_{\rm AB} + 1$) between two neighbouring main minima.
Received: 29 September 2008
Revised: 27 November 2008
Accepted manuscript online:
PACS:
68.43.Jk
(Diffusion of adsorbates, kinetics of coarsening and aggregation)
Fund: Project supported by the Natural
Science Foundation of Zhejiang province, China(Grant No Y607142) and
by the National Natural
Science Foundation of China (Grant No 20771092).
Cite this article:
Qian Chang-Ji(钱昌吉), Li Hong(李洪), Zhong Rui(钟瑞), Luo Meng-Bo(罗孟波), and Ye Gao-Xiang(叶高翔) Monte Carlo simulation of ramified aggregates on hetero-substrates 2009 Chin. Phys. B 18 1947
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