کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5375330 | 1504298 | 2009 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Core level photoemission spectroscopy and chemical bonding in Sr2Ta2O7
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Electronic parameters of constituent element core levels of strontium pyrotantalate (Sr2Ta2O7) were measured with X-ray photoelectron spectroscopy (XPS). The Sr2Ta2O7 powder sample was synthesized using standard solid state method. The valence electron transfer on the formation of the Sr-O and Ta-O bonds was characterized by the binding energy differences between the O 1s and cation core levels, Î(O-Sr) = BE(O 1s) â BE(Sr 3d5/2) and Î(O-Ta) = BE(O 1s) â BE(Ta 4f7/2). The chemical bonding effects were considered on the basis of our XPS results for Sr2Ta2O7 and earlier published structural and XPS data for other Sr- and Ta-containing oxide compounds. The new data point for Sr2Ta2O7 is consistent with the previously derived relationship for a set of Sr-bearing oxides. The binding energy difference Î(O-Sr) was found to decrease with increasing bond distance L(Sr-O).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 360, Issues 1â3, 12 June 2009, Pages 74-78
Journal: Chemical Physics - Volume 360, Issues 1â3, 12 June 2009, Pages 74-78
نویسندگان
V.V. Atuchin, J.-C. Grivel, Zhaoming Zhang,