کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1797158 | 1023769 | 2006 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The synthesis and photoluminescent properties of calcium tungstate nanocrystals
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک ماده چگال
پیش نمایش صفحه اول مقاله

چکیده انگلیسی
CaWO4 nanocrystals with average diameters of 20-30Â nm and nanorods with mean lengths of 600-1000Â nm were controllably synthesized through a facile microemulsion-mediated hydrothermal procedure. And the factors affecting the morphologies of the products, such as the molar ratio (w) between water and CTAB, the reaction temperature and the concentration of the reactants, were studied and discussed. With the increase of the w value, the diameter of the as-synthesized products increased gradually, except in the case of w=10 where nanorods were formed. With the temperature increasing, the morphologies of the products changed from nanocrystals to nanorods, and finally to nanocrystals again. However, the concentration of the reactants exhibited no obvious influence on the shape and size of the CaWO4 product. A possible mechanism is proposed for the selective formation of the different morphologies. The photoluminescent properties of the CaWO4 nanocrystals are also reported. All the products of CaWO4 with different morphologies exhibited the only green peak at 435Â nm with an excitation wavelength at 238Â nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Crystal Growth - Volume 289, Issue 1, 15 March 2006, Pages 231-235
Journal: Journal of Crystal Growth - Volume 289, Issue 1, 15 March 2006, Pages 231-235
نویسندگان
Lingna Sun, Minhua Cao, Yonghui Wang, Genban Sun, Changwen Hu,