کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9594616 | 1507971 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Step mediated surface alloy formation of Pt/Cu(1Â 1Â 1)
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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: Step mediated surface alloy formation of Pt/Cu(1Â 1Â 1) Step mediated surface alloy formation of Pt/Cu(1Â 1Â 1)](/preview/png/9594616.png)
چکیده انگلیسی
Medium energy ion scattering has been used to probe the early stages of the development of a surface alloy of platinum deposited on Cu(1Â 1Â 1). Our experiments reveal the presence of a novel two-layer “precursor” Pt-Cu alloy at low temperatures prior to formation of the expected Cu3Pt surface alloy at near 550Â K. Comparison of the alloying behaviour of one monolayer of platinum on a nominally flat copper surface with that on a vicinal copper surface, Cu(12Â 12Â 11), demonstrates that the formation of this precursor alloy is mediated by steps on the surface. A model is proposed for the mechanism of formation of this precursor alloy, which occurs at much lower temperatures than previously observed for surface alloying of the platinum-copper system.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 588, Issues 1â3, 20 August 2005, Pages 101-107
Journal: Surface Science - Volume 588, Issues 1â3, 20 August 2005, Pages 101-107
نویسندگان
P.C. Dastoor, D.J. O'Connor, D.A. MacLaren, W. Allison, T.C.Q. Noakes, P. Bailey,