The Influence of SiO2 Shell on Fluorescent Properties of LaF3:Nd3+/SiO2 Core/Shell Nanoparticles | Zendy

Kai Cui | Zendy; Chao Gao | Zendy; Bo Peng | Zendy; Wei Wei | Zendy

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The Influence of SiO₂ Shell on Fluorescent Properties of LaF₃:Nd³⁺/SiO₂ Core/Shell Nanoparticles

Author(s) -

Kai Cui,

Chao Gao,

Bo Peng,

Wei Wei

Publication year - 2010

Publication title -

journal of nanomaterials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.463

H-Index - 66

eISSN - 1687-4129

pISSN - 1687-4110

DOI - 10.1155/2010/238792

Subject(s) - materials science , nanoparticle , fluorescence , excitation , analytical chemistry (journal) , shell (structure) , spectral line , luminescence , nanotechnology , composite material , optics , optoelectronics , chemistry , physics , electrical engineering , engineering , chromatography , astronomy

Distinct effects of the SiO2 shell on fluorescence properties of LaF3:Nd3+/SiO2 core/shell nanoparticles were demonstrated by annealling the nanoparticles at different temperatures. Emission spectra, excitation spectra, and decay curves of the nanoparticles were measured. A significant improvement of fluorescence intensity was observed for LaF3:Nd3+/SiO2 core/shell nanoparticles annealed at 900∘C. The phenomenon is ascribed to the change of environment of LaF3:Nd3+ core which is imposed by SiO2 shell. And the change is confirmed by the excitation spectra. It provides a useful way to improve fluorescent intensity of the SiO2-coated LaF3:Nd3+ nanoparticles. The lifetime for nanoparticles annealed at 900∘C shows a slight decrease contrast with nanoparticles annealed at 400 and 600∘C. This is caused by the higher phonon energy of SiO2 than that of LaF3

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