کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1525273 | 1511839 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Composition related properties of (Yb,Y)2O3 nanoparticles synthesized by controlled thermal degradation of AA complexes
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
After controlled thermal degradation of acetylacetonato (AA) complexes, mixtures of monodisperse â¼5 nm large isometric particles of Y2âxYbxO3 (x = 0.06, 0.10, 0.20, 0.40) were synthesized. Detailed information on nanoparticles' microstructure and core crystal structure is reported. The Yb3+ ions occupy preferently C3i sites for low Yb3+ concentrations, while for 20 at.% Yb3+, a random distribution was found. It was shown that the particle/crystallite size and strain as well as Raman modes positions and widths are influenced by Yb3+ concentration. Crystallographic and Raman spectroscopy results indicate that the particles are core/shell structured with cubic crystalline core and monoclinic-like disordered shell. Most probable particle's shell/core volume ratio decreased with annealing at 500 °C and the shell disappeared when annealed at 1000 °C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Chemistry and Physics - Volume 122, Issues 2â3, 1 August 2010, Pages 386-391
Journal: Materials Chemistry and Physics - Volume 122, Issues 2â3, 1 August 2010, Pages 386-391
نویسندگان
B. Antic, A. KremenoviÄ, M. Vucinic-Vasic, Z. Dohcevic-Mitrovic, A.S. Nikolic, M. Gruden-Pavlovic, B. JanÄar, A. Meden,