کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5350177 | 1503627 | 2015 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Capacity of graphite's layered structure to suppress the sputtering yield: A molecular dynamics study
ترجمه فارسی عنوان
ظرفیت ساختار لایه ای گرافیت برای مهار تولید اسپری: مطالعه دینامیک مولکولی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
چکیده انگلیسی
20-120Â keV C60 bombardment on graphite and 20Â keV C60 impact on diamond are studied by classical molecular dynamics (MD) simulations. The number of atoms ejected from graphite after a 20Â keV C60 impact is found to be much smaller than that from diamond. By analyzing the microscopic sputtering process, we find this difference is due to the combined effects of graphite's low number density and layered structure. These two features of graphite make the pressure waves during the spike stage much weaker and the crater rim much more stable, compared to the case of diamond. While the role of atomic density on sputtering has been discussed in previous studies, effect of layered structure has not gained much attention yet. To affirm this effect and exclude the influence of density, we have also simulated C60 impact on an amorphous carbon (a-C) target whose density is very close to that of graphite. The yield of a-C is higher than that of graphite, certifying the capacity of graphite's layered structure to suppress the sputtering yield.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 337, 15 May 2015, Pages 6-11
Journal: Applied Surface Science - Volume 337, 15 May 2015, Pages 6-11
نویسندگان
Jiting Tian, Tao Zheng, Jiangyan Yang, Shuyan Kong, Jianming Xue, Yugang Wang, Kai Nordlund,