کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9594888 | 1507960 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation and characterization of well-ordered, thin niobia films on a metal substrate
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
Combining low energy electron diffraction, scanning tunneling microscopy, angular resolved photoelectron spectroscopy using synchrotron radiation and density functional theory calculations, we have studied the structure of thin niobia films grown on a Cu3Au(1 0 0) substrate. Nb deposition onto oxygen implanted Cu3Au(1 0 0) and subsequent oxidation results in a flat, well-ordered thin niobia film of hexagonal symmetry. The results suggest that the film consists of 2/3 ML of Nb between two hexagonal O-layers, where Nb5+ cations occupy the threefold hollow sites. This leads to a (3Ã3)R30° structure with respect to the underlying close packed O layer, which in turn forms a (2 Ã 7) coincidence structure with the metal substrate. The defect structure includes reflection domain boundaries and vacancies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 599, Issues 1â3, 30 December 2005, Pages 14-26
Journal: Surface Science - Volume 599, Issues 1â3, 30 December 2005, Pages 14-26
نویسندگان
D.E. Starr, F.M.T. Mendes, J. Middeke, R.-P. Blum, H. Niehus, D. Lahav, S. Guimond, A. Uhl, T. Kluener, M. Schmal, H. Kuhlenbeck, S. Shaikhutdinov, H.-J. Freund,