Conversion materials research on rare earth made ​​new progress

Recently, the Chinese Academy of Sciences FJIRSM Optoelectronic Materials Chemistry and Physics Laboratory research team and Chen Yuan , State Key Laboratory of Structural Chemistry Huangming Dong research team , for the first time by thermal decomposition method , by injecting high-temperature coating precursor synthesized excellent luminescent properties of LiLuF4: Ln3 + nanocrystals on a core-shell structure conversion .

Multi-layer core-shell coating significantly improves the upconversion nanocrystals efficiency , which Er3 + and Tm3 + absolute quantum yield reached 5.0% and 7.6 % have been reported for the highest value of rare earth conversion monodisperse nanocrystals doped . After the surface-modified nanocrystalline conversion as a fluorescent probe for high sensitivity detection of disease -specific markers . For example , the conversion of phase detection of β subunit of human chorionic gonadotropin (β-hCG, an important tumor marker ) detection limit of 3.8 ng / mL, with normal serum β-hCG in comparable level .


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