کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5397118 | 1505775 | 2007 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface composition and structure of nickel ultra-thin films deposited on Pd(111)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ultra-thin nickel films deposited on the Pd(111) surface were characterized by X-ray photoelectron spectroscopy (XPS), low-energy electron diffraction (LEED), and X-ray photoelectron diffraction (XPD). Up to 3 ML coverage, a LEED (1 Ã 1) pattern with a diffuse background due to a random distribution of Ni atoms on the surface is observed. Annealing at 600 °C reduced the background drastically and sharp (1 Ã 1) spots appeared on the screen, but XPS showed no presence of nickel on the surface, indicating diffusion into the bulk. Annealing at 300 °C for 30 min yielded also a sharp (1 Ã 1) LEED pattern, and the XPS Ni/Pd intensity ratio decreased with annealing time. The comparison between experimental and theoretical XPD results indicated that the surface was covered partially by Ni islands and partially by a random Ni-Pd surface alloy.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 156â158, May 2007, Pages 405-408
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volumes 156â158, May 2007, Pages 405-408
نویسندگان
M.F. Carazzolle, S.S. Maluf, A. de Siervo, P.A.P. Nascente, R. Landers, G.G. Kleiman,