1. Sensitized luminescence of water-dispersible CaF2: RE3+ (RE=Eu, Tb, Ce/Tb) nanoparticles through surfactant coating ligands.
- Author
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Song, Limei, Gao, Jianhua, and Li, Jiangtao
- Subjects
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LUMINESCENCE , *DISPERSION (Chemistry) , *CALCIUM fluoride , *SURFACE active agents , *LIGANDS (Chemistry) , *METAL nanoparticles , *PYRROLIDINONES - Abstract
A facile route has been established for the synthesis of PVP/CaF2: RE3+ and PVP/CaF2: Ce3+ nanoparticles (RE=Eu, Tb, Ce/Tb; PVP=Poly(N-vinyl-2-pyrrolidone)) heated at 70°C in ethanol at ambient pressure. The as-prepared nanoparticles were shown to be well dispersed in water. The nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The investigation of fluorescence properties showed that there exists energy transfer from the surface coating of PVP to Eu3+ and Tb3+ leading to the sensitized fluorescence emission of Eu3+ and Tb3+. Co-doping the PVP/CaF2: Tb3+ nanoparticles with Ce3+ results in significant increase in the emission intensity of Tb3+ and this has been attributed to the sensitization of Ce3+ and PVP on Tb3+. [ABSTRACT FROM AUTHOR]
- Published
- 2014
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