کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5424783 | 1395835 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface structure of (112¯0) Al2O3 single crystals after high temperature annealing
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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: Surface structure of (112¯0) Al2O3 single crystals after high temperature annealing Surface structure of (112¯0) Al2O3 single crystals after high temperature annealing](/preview/png/5424783.png)
چکیده انگلیسی
The surface structure of a-plane (112¯0) Al2O3 single crystals with a <101¯0> inclined direction was studied as a function of annealing temperature using atomic force microscopy. The samples had a large increase in step height and terrace width with increasing annealing temperature. For the samples annealed at 1500 °C and 1600 °C the step edge structure became significantly faceted. The facets consisted of (0 0 0 1) and (101¯2) planes as a result of these two planes being the ones with the lowest surface energies in Al2O3. In addition, the surface morphology displayed the formation of ridges 0.3 nm high and â¼20 nm wide at 1600 °C which originate from a tendency of the surface to form a (4 Ã 1) reconstruction with the sharp step edges acting as reconstruction nucleation sites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface Science - Volume 603, Issue 1, 1 January 2009, Pages 232-236
Journal: Surface Science - Volume 603, Issue 1, 1 January 2009, Pages 232-236
نویسندگان
Kamen Simeonov, David Lederman,