Facile one-pot synthesis of hydrophilic NaYF4:Yb,Er@NaYF4:Yb active-core/active-shell nanoparticles with enhanced upconversion luminescence

被引：31

作者：

Chen, Meilian ^{[1
,2
]}

Ma, Yan ^{[1
,2
]}

Li, Mingyong ^{[1
,2
]}

机构：

[1] Chongqing Normal Univ, Coll Comp & Informat Sci, Chongqing 400047, Peoples R China

[2] Chongqing Normal Univ, Inst Computat Chem, Chongqing 400047, Peoples R China

来源：

MATERIALS LETTERS | 2014年 / 114卷

关键词：

One-pot synthesis; NaYF4; Nanoparticles; Core-shell structure; Hydrophilicity; Luminescence; SOLVOTHERMAL SYNTHESIS; NANOPHOSPHORS; NANOCRYSTALS; FLUORESCENCE; PHOSPHORS; STRATEGY; CELLS;

D O I：

10.1016/j.matlet.2013.09.099

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report a facile one-pot synthesis strategy for hydrophilic NaYF4:Yb,Er@NaYF4:Yb active-core/active-shell nanoparticles by two-step injection of ethylene glycol (EG) solution containing different rare earth ions, BF4-, Na+ and Poly(vinylpyrrolidone) (PVP) into EG at 180 degrees C. NaYF4:Yb,Er@NaYF4:Yb nanoparticles have the size of about 100 nm and cubic-phase structure. The presence of PVP ligands on their surface confers high solubility in water. The aqueous dispersion of these NaYF4:Yb,Er@NaYF4:Yb nanoparticles exhibits greatly enhanced up-converting luminescence, compared with that of NaYF4:Yb,Er core-only nanoparticles and NaYF4:Yb,Er@NaYF4 active-core/inert-shell nanoparticles. Therefore, these hydrophilic NaYF4:Yb,Er@NaYF4:Yb nanoparticles have great superiority as luminescent labeling materials for biological applications. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：80 / 83

页数：4

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