کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5426744 1395900 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
FeO(1 1 1) formation by exposure of Fe(1 1 0) to atomic and molecular oxygen
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
FeO(1 1 1) formation by exposure of Fe(1 1 0) to atomic and molecular oxygen
چکیده انگلیسی

The growth, structure, and morphology of ultrathin iron oxide layers formed on a Fe(1 1 0) single crystal surface are investigated by Auger electron spectroscopy, low energy electron diffraction, and grazing ion scattering. For Fe oxidation by atomic instead of molecular oxygen, the gas exposure can be reduced by almost two orders of magnitude because surface sticking and dissociation are not limiting the growth process. A well-ordered FeO(1 1 1) film with low defect density is only obtained with atomic oxygen. Compared to the bulk, the FeO lattice is laterally compressed by about 5-6% resulting in an in-plane oxygen (Fe) nearest-neighbor distance of 2.87 Å. Independent of the preparation method, long-range structural order is poor if the oxide film thickness is increased to 3-5 layers. This is attributed to the relatively large lattice mismatch between FeO(1 1 1) and Fe(1 1 0).

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 600, Issue 13, 1 July 2006, Pages 2778-2784
نویسندگان
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