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Your search keyword '"Yao, Shaowei"' showing total 16 results
Start Over Author "Yao, Shaowei" Publisher elsevier bv
16 results on '"Yao, Shaowei"'

12. Synthesis and characterization of Tb3+/Gd3+ dual-doped multifunctional hydroxyapatite nanoparticles

Author

Feng Xiaoxin, Fengfeng Li, Liu Zhigang, Qiao Wang, Yang Lirong, Yu Shouwu, and Yao Shaowei

Subjects
Lanthanide, Materials science, Photoluminescence, Process Chemistry and Technology, Hexagonal phase, Nanoparticle, Nanotechnology, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Crystallinity, Magnetization, Transmission electron microscopy, Materials Chemistry, Ceramics and Composites, Luminescence, Nuclear chemistry
Abstract

Tb 3+ /Gd 3+ dual-doped multifunctional hydroxyapatite (Tb 3+ /Gd 3+ -HAp) nanoparticles with magnetic and luminescent properties were prepared by the co-precipitation method using CaCl 2 and Na 2 HPO 4 ·12H 2 O as raw materials and CTAB as a template in alkaline conditions. The products were characterized by X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM). Single hexagonal phase Tb 3+ /Gd 3+ -HAp nanoparticles were obtained by the co-precipitation method and the products were sphere-like morphology with particle sizes ranging from 40 to 100 nm. Crystallinity degree of the products decreased with the Tb 3+ /Gd 3+ substitute increasing. Photoluminescence (PL) and magnetic properties of the products were also investigated. The results show Tb 3+ /Gd 3+ -HAp nanoparticles are endowed with strong luminescence at 544 nm and prominent paramagnetic behavior, allowing their potential applications in biological labeling. Gd 3+ ions sensitize the 5 D 4 - 7 F 5 transition emission of Tb 3+ ions in HAp nanoparticles, and the PL emission intensity increases along with increasing concentration of Gd 3+ ions. Concentration quenching occurs when the Gd 3+ concentration exceeds 10 mol%. The magnetization level of Tb 3+ /Gd 3+ -HAp increased steadily with the doping concentration of Gd 3+ ions.

Published
2014
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