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Crossover from 2-dimensional to 3-dimensional aggregations of clusters on square lattice substrates |
Cheng Yi (程毅)a, Zhu Yu-Hong (祝宇红)b, Pan Qi-Fa (潘启发)a, Yang Bo (杨波)a, Tao Xiang-Ming (陶向明)a, Ye Gao-Xiang (叶高翔)a |
a Department of Physics, Zhejiang University, Hangzhou 310027, China; b Department of Physics, Hangzhou Normal University, Hangzhou 310036, China |
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Abstract A Monte Carlo study on the crossover from 2-dimensional to 3-dimensional aggregations of clusters is presented. Based on the traditional cluster-cluster aggregation (CCA) simulation, a modified growth model is proposed. The clusters (including single particles and their aggregates) diffuse with diffusion step length l (1 ≤ l ≤ 7) and aggregate on a square lattice substrate. If the number of particles contained in a cluster is larger than a critical size sc, the particles at the edge of the cluster have a possibility to jump onto the upper layer, which results in the crossover from 2-dimensional to 3-dimensional aggregations. Our simulation results are in good agreement with the experimental findings.
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Received: 28 April 2015
Revised: 09 July 2015
Accepted manuscript online:
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PACS:
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81.15.Aa
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(Theory and models of film growth)
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36.40.Sx
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(Diffusion and dynamics of clusters)
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61.43.Hv
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(Fractals; macroscopic aggregates (including diffusion-limited Aggregates))
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05.40.-a
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(Fluctuation phenomena, random processes, noise, and Brownian motion)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11374082 and 11074215), the Science Foundation of Zhejiang Province Department of Education, China (Grant No. Y201018280), the Fundamental Research Funds for Central Universities, China (Grant No. 2012QNA3010), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20100101110005). |
Corresponding Authors:
Ye Gao-Xiang
E-mail: gxye@mail.hz.zj.cn
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Cite this article:
Cheng Yi (程毅), Zhu Yu-Hong (祝宇红), Pan Qi-Fa (潘启发), Yang Bo (杨波), Tao Xiang-Ming (陶向明), Ye Gao-Xiang (叶高翔) Crossover from 2-dimensional to 3-dimensional aggregations of clusters on square lattice substrates 2015 Chin. Phys. B 24 118105
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