Synthesis and luminescence of CePO4:Tb/LaPO4 core/sheath nanowires.
CePO(4):Tb/LaPO(4) nanowires with a core/sheath architecture have been successful synthesized by a facile aqueous chemical method mediated by original CePO(4):Tb aggregation seeds. The seed crystals serve as both a luminescence center and a nucleation site for epitaxial growth. The seed nanocrystals have an irregular sphere-like shape with an average size of around 6.8 nm and a narrow size distribution. When the seed crystals are coated with LaPO(4), the resulting core/sheath CePO(4):Tb/LaPO(4) nanowires have mean diameters of about 7.6 nm and lengths up to 331 nm. Both photo- and x-ray luminescence demonstrate that the LaPO(4) coating increases the luminescence efficiency. These core/sheath structured nanowires may find potential applications in solid state lighting, medical imaging and radiation detection.
Li
Yuebin
Y
Department of Physics, University of Texas at Arlington, Arlington, TX 76019, USA.
Sun
Zhong
Z
Ma
Lun
L
Zhang
Xing
X
Yao
Mingzhen
M
Joly
Alan G
AG
Liu
Zuli
Z
Chen
Wei
W
D002586:Cesium / Q000737:chemistry*; D007811:Lanthanum / Q000737:chemistry*; D049449:Luminescence; D046529:Microscopy, Electron, Transmission; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D010316:Particle Size; D010710:Phosphates / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013725:Terbium / Q000737:chemistry*; D014961:X-Ray Diffraction
D010710:Phosphates; D013725:Terbium; D002586:Cesium; D007811:Lanthanum