Dynamics of Cu monomer, dimer and trimer on Ag (110) (1 x 2) missing-row reconstructed surface

    Authors

    K. Sbiaai; Y. Boughaleb; M. Mazroui;A. Kara

    Comments

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    Abbreviated Journal Title

    Surf. Interface Anal.

    Keywords

    embedded adatom method; molecular dynamic simulations; adatom; dimer; trimer; copper; silver; DIFFUSION BARRIER ENERGIES; SELF-DIFFUSION; METAL-SURFACES; CORE-SHELL; CLUSTERS; PT(110)-(1X2); NANOPARTICLES; GROWTH; Chemistry, Physical

    Abstract

    The authors aimed to investigate the diffusion of Cu monomer, dimer and trimer on Ag (110) (1x2) missing-row surface. This problem is addressed through molecular dynamic simulation based on semi-empirical many-body potential, derived from the embedded atom method. Within this approach, we have identified and calculated the activation energy of each microscopic mechanism. Thus, for Cu monomer, the diffusion process occurs essentially by simple hopping between nearest-neighbor sites. While for the Cu dimer, three processes have been identified such as dissociation-reassociation (DR), concerted jump (CJ) and leapfrog mechanisms (LF) with a slight predominance of DR process and a dual competition between CJ and LF processes. But, in the case of small one-dimensional cluster such as trimer on (110)(1x2) missing-row reconstructed surface, the main diffusion mechanism is the LF process. These results shed light on the diffusion processes on missing-row reconstructed surfaces, especially for heterogeneous systems. Copyright (c) 2013 John Wiley & Sons, Ltd.

    Journal Title

    Surface and Interface Analysis

    Volume

    45

    Issue/Number

    11-12

    Publication Date

    1-1-2013

    Document Type

    Article

    Language

    English

    First Page

    1702

    Last Page

    1708

    WOS Identifier

    WOS:000325611100008

    ISSN

    0142-2421

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