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- W2364442336 abstract "Rare earth ions(Er~(3+),Eu~(3+) and Yb~(3+)) doped LaPO_4 and YbPO_4 nanocrystals were synthesized by a coordinate precipitation method.In a high temperature organic solution the LaCl_3 and tributyl phosphate form a complex and react with H_3PO_4 to yield LaPO_4 nanocrystals.The structural properties of LaPO_4 nanocrystals were studied by X-ray diffraction(XRD),high resolution transmission electron microscopy(HRTEM),Fourier transform infrared spectrometer(FT-IR). HRTEM measured the size about 4 nm and showed the clear lattice fringe image of the nanocrystals which validated the high crystallinity.XRD patterns show that the samples crystallized in monazite structure.The emission of the nanocrystals under 975 nm excited was measured and the peak was at 1535 nm.Elemental analysis result revealed that the common desiccation in vacuum was failed to remove the residual quenching group such as O—H and C—H.When coated by a LaPO_4 shell the fluorescence intensity was obviously enhanced.It validated the conclusion that the core/shell structure could enhance the emission of nanocrystals." @default.
- W2364442336 created "2016-06-24" @default.
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- W2364442336 date "2010-01-01" @default.
- W2364442336 modified "2023-09-26" @default.
- W2364442336 title "Synthesis and Characterization of Er-Yb Codoped LaPO_4 Nanocrystals Possessing Near-IR Fluorescence" @default.
- W2364442336 hasPublicationYear "2010" @default.
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