کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1678629 | 1009950 | 2007 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface effects in the energy loss near edge structure of different cobalt oxides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The energy loss near edge structure (ELNES) of the O-K and Co-L edges of both Co3O4 and CoO particles were studied. Significant changes between the edge and nearby thicker regions are found for the O-K edge, the Co-L edge, the O/Co atomic ratio, the separation between the prepeaks in the O-K edge, as well as the L3/L2 intensity ratios in the Co-L edge. These reflect the changes in the average oxidation state of the specimen from the edge to nearby thicker regions. These variations originate from a surface layer which dominates the results near the edge of the particles. These variations allow us to infer the surface structure, which indicates that both particles are encapsulated by different non-stoichiometric oxides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 107, Issue 8, August 2007, Pages 598–603
Journal: Ultramicroscopy - Volume 107, Issue 8, August 2007, Pages 598–603
نویسندگان
Zaoli Zhang,