کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5348442 | 1388079 | 2015 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Epitaxial growth of Cu on Ag(1Â 1Â 1) studied with angle-resolved photoemission spectroscopy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Epitaxial growth of Cu on Ag(1Â 1Â 1) studied with angle-resolved photoemission spectroscopy Epitaxial growth of Cu on Ag(1Â 1Â 1) studied with angle-resolved photoemission spectroscopy](/preview/png/5348442.png)
چکیده انگلیسی
The growth of Cu on Ag(1Â 1Â 1) under varied growth conditions was investigated with angle-resolved photoemission spectra. The evolution of Cu/Ag(1Â 1Â 1) during annealing was characterized on monitoring its surface states. The surface morphology of a Cu film on Ag(1Â 1Â 1) depends on the temperature and the Cu coverage. Islands or crystalline films develop when Cu is deposited at â¼300Â K. Defects in the Cu films penetrate deeply into the Ag(1Â 1Â 1) substrate and expose the Ag(1Â 1Â 1) surface. The deposition of Cu at a low temperature results in disordered films. On annealing, the films become ordered with defects. Our results show the segregation of Ag on the Cu surface, which occurs at 300Â K and becomes accelerated significantly at â¼380Â K. After being annealed above 430Â K, all islands and films of Cu are fully covered with Ag, showing a (9Â ÃÂ 9) reconstruction. Our results indicate also that the segregation of Ag on the Cu surface occurs only after the Ag(1Â 1Â 1) surface is exposed, indicating that Ag atoms migrate to the Cu(1Â 1Â 1) surface, not through bulk Cu, but along the walls of the islands and the defects in the films.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 354, Part A, 1 November 2015, Pages 235-239
Journal: Applied Surface Science - Volume 354, Part A, 1 November 2015, Pages 235-239
نویسندگان
Dah-An Luh, Chih-Hao Huang, Cheng-Maw Cheng, Ku-Ding Tsuei,