کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5402452 | 1392734 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural characterization and ytterbium spectroscopy in Sc2O3 nanocrystals
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Ytterbium-doped scandium oxide nanocrystals measuring less than 25 nm with compositions of Sc2âxYbxO3 (x=0.001-1) were prepared using the modified Pechini method. The Yb:Sc2O3 nanocrystals were obtained by calcination at low temperature such as 1073 K for 2 h. X-ray powder diffraction (XRD) and transmission electronic microscopy (TEM) were used to perform the structural characterization of nanocrystals; these studies indicated that the nanocrystals have high crystalline quality with cubic structure and Ia3¯ space group. The morphology and particle size were studied using electron microscopy. A detailed study of the effect of the nanodimension and the ytterbium concentration on the spectroscopic characteristics of Yb3+ as an active ion was carried out in terms of optical absorption, optical emission and fluorescence decay time at room and low temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 130, Issue 8, August 2010, Pages 1437-1443
Journal: Journal of Luminescence - Volume 130, Issue 8, August 2010, Pages 1437-1443
نویسندگان
M. Galceran, M.C. Pujol, J.J. Carvajal, X. Mateos, C. Zaldo, M. Aguiló, F. DÃaz,