کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1525574 995357 2009 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Energy of formation and dynamics of vacancies in nanometre-sized crystalline Au and Cu systems
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Energy of formation and dynamics of vacancies in nanometre-sized crystalline Au and Cu systems
چکیده انگلیسی
Classical molecular dynamics simulations have been employed to estimate the energy required to form vacancy in unsupported nanometre-sized spherical particles of Au and Cu. Their dynamics has been also investigated to corroborate the vacancy formation energy estimates and to characterize its relationship with particle size. It is shown that the particle is a strongly inhomogeneous system. The generation of vacancies at random in its interior permits to identify three different regions characterized by as much different values of vacancy formation energy. The bulk-like region exhibits values equal to the ones pertaining to bulk systems, whereas the vacancy formation energy increases as the surface layer is approached. It follows that the vacancy formation energy is slightly higher in nanometre-sized particles than in bulk.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 115, Issue 1, 15 May 2009, Pages 361-366
نویسندگان
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