Controllable synthesis and luminescence property of LnPO4 (Ln = La, Gd, Y) nanocrystals
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- Lin, S., Dong, X., Jia, R. et al. J Mater Sci: Mater Electron (2010) 21: 38. doi:10.1007/s10854-009-9866-7
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Lanthanide orthophosphate LnPO4 (Ln = La, Gd, Y) nanocrystals with different crystalline structures and morphologies were synthesized successfully by a hydrothermal method under mild conditions. The obtained LaPO4 have a monoclinic or hexagonal structure with varying the temperature. However, as to GdPO4 and YPO4, the temperature has no obvious effect on their structures. By tuning the amount of cetyltrimethylammonium bromide (CTAB), the morphology and size of all samples can be controlled easily and effectively. Noticeably, the structure of YPO4 can also be controlled by using the CTAB. A systematic study of the photoluminescence in Ln3+-doped lanthanide phosphates shows that the luminescent properties of these nanophosphors are strongly dependent on their crystal structures and morphologies.