کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5425723 1395864 2007 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Calculation of anisotropic strain-engineered patterns of monolayer islands
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Calculation of anisotropic strain-engineered patterns of monolayer islands
چکیده انگلیسی

The self-organization of monolayer epitaxy islands in presence of anisotropies in surface stress, applied stress, and lattice mismatch between the film and substrate materials is investigated. The fundamental nature of island interactions is addressed in the context of a model wherein the system free energy consists of the excess energy and strain energy of atomic surface steps. It is shown the anisotropy can change the character of island interactions. An energy-reducing kinetic relation is adopted to evolve an initially random morphology towards a generally metastable minimum energy state. It is found the self-organization of islands into a regular array requires both the repulsion between islands and tendency for islands to aligned in a particular direction. Small anisotropies provide the required repulsion but not the tendency for islands to align and large anisotropies provide the necessary alignment but cause islands to attract. Modest levels of anisotropy provide the most favorable conditions of self-organization.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 601, Issue 17, 1 September 2007, Pages 3569-3578
نویسندگان
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