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  • 68.70.+w  (1)
  • PACS: 61.46.+w Clusters, nanoparticles, and nanocrystalline materials – 81.15.Hi Molecular, atomic, ion, and chemical beam epitaxy – 68.65.+g Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Applied physics 60 (1995), S. 167-171 
    ISSN: 1432-0630
    Keywords: 68.70.+w ; 61.43.Hv ; 68.55.-a
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We have used variable-temperature scanning tunneling microscopy to study the aggregation of two-dimensional Ag clusters on Pt(111). A transition from randomly ramified to dendritic fractal growth is observed in the diffusion-limited regime. Atomic-scale observations have identified the anisotropy of edge diffusion as microscopic origin of this crossover. Dependent on the deposition flux, this anisotropy is either amplified to the macroscopic-cluster shape and trigonal dendrites result, or it is degenerated and randomly ramified fractals occur. Our study elucidates the close relation between fractal and dendritic pattern formation in diffusion-limited aggregation on a two-dimensional lattice.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 9 (1999), S. 25-28 
    ISSN: 1434-6079
    Keywords: PACS: 61.46.+w Clusters, nanoparticles, and nanocrystalline materials – 81.15.Hi Molecular, atomic, ion, and chemical beam epitaxy – 68.65.+g Low-dimensional structures (superlattices, quantum well structures, multilayers): structure, and nonelectronic properties
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. We present a novel method for the fabrication of well-ordered, two-dimensional nanocluster arrays. The method is based on the confined nucleation of adatoms within the superstructure cells of periodic surface dislocation networks, which form in many heteroepitaxial systems. We show how quantitative understanding of adatom diffusion and heterogeneous nucleation on such surfaces can be obtained through kinetic Monte-Carlo simulations and discuss the potential of this approach.
    Type of Medium: Electronic Resource
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