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Yb 3+ doped rare earth stannate [Ln 2 Sn 2 O 7 (Ln=La, Y, Lu, Gd)] nanocrystals were successfully prepared by a simple hydrothermal method. All the products were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM), which revealed that they are pyrochlore-type rare earth stannate nanocrystals with the diameter of about 15nm. Room temperature...
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