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Author Wu, Xiaofeng ♦ Hu, Shigang ♦ Tan, Congbing ♦ Liu, Yunxin
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword MATERIALS SCIENCE ♦ ALLOY SYSTEMS ♦ CRYSTAL FIELD ♦ DOPED MATERIALS ♦ ERBIUM ADDITIONS ♦ FLUORESCENCE ♦ FLUORIDES ♦ FLUORINE COMPOUNDS ♦ GADOLINIUM COMPOUNDS ♦ LANTHANUM IONS ♦ LUTETIUM IONS ♦ MAGNETIC PROPERTIES ♦ NANOSTRUCTURES ♦ PARAMAGNETISM ♦ SENSITIZERS ♦ SODIUM COMPOUNDS ♦ SYNTHESIS ♦ THULIUM IONS ♦ YTTERBIUM ADDITIONS
Abstract Graphical abstract: Crystal field tuning is a powerful approach for simultaneously enhancing the optical and magnetic properties of lanthanide-doped NaGdF{sub 4} bi-functional nanocrystals. - Abstract: Here, we show the simultaneous enhancement of fluorescent and paramagnetic properties in bifunctional NaGdF{sub 4}:Yb{sup 3+}/Er{sup 3+} nanocrystals by crystal field tuning. The energy level splitting calculation indicates, that lanthanide ionic pairs La{sup 3+}/Lu{sup 3+} introduced into the NaGdF{sub 4} host can modify the crystal field around emitters (e.g., Er{sup 3+} and Tm{sup 3+}) and sensitizers (e.g., Yb{sup 3+}) that result in the broadening of crystal field splitting of energy levels and the abundant multi-site distribution of upconversion luminescence. The optimization of the paramagnetic properties in NaGdF{sub 4} doped with emitters and sensitizers is ascribed to the lowering of anti-ferromagnetic coupling.
ISSN 00255408
Educational Use Research
Learning Resource Type Article
Publisher Date 2015-04-15
Publisher Place United States
Journal Materials Research Bulletin
Volume Number 64


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