کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9614579 | 48543 | 2005 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Metal surface adsorbed clusters: Structure and dynamics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Extensive numerical simulation are reported for the structure and dynamics of large clusters on metal(1â0â0) surfaces. Different types of perimeter hopping processes makes center-of-mass of the cluster to follow a a random walk trajectory. A d iffusion coefficient D for the whole cluster can be defined as limâ¡tââD(t), with D(t)=ãd2ã/(4t) and d the displacement of the center-of-mass from its initial position. The dependence of the diffusion coefficient on those perimeter hopping processes can be analyzed in detail, since the relations between different rates for the processes are explicitly considered as parameters. The value of the diffusion coefficient D behaves as Dâ¼Nâα, while different values for the exponent α have been proposed depending on which diffusion mechanism is considered to facilitate the movement of the cluster.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Catalysis A: Chemical - Volume 237, Issues 1â2, 2 August 2005, Pages 206-209
Journal: Journal of Molecular Catalysis A: Chemical - Volume 237, Issues 1â2, 2 August 2005, Pages 206-209
نویسندگان
Juan R. Sánchez,