Synthesis and characterization of efficient near-infrared upconversion Yb and Tm codoped NaYF4 nanocrystal reporter

被引：83

作者：

Wei, Yang ^{[1
]}

Lu, Fengqi ^{[1
]}

Zhang, Xinrong ^{[1
]}

Chen, Depu ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 427卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

nanostructured materials; chemical synthesis; luminescence;

D O I：

10.1016/j.jallcom.2006.03.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Efficient near-infrared (NIR) upconversion Yb and Tm codoped NaYF4 nanocrystal reporter was prepared by synthesis at room temperature via wet-chemical route and then heat-treatment at elevated temperature. Several parameters such as pH value of solution, sequence of reactant addition, and annealing temperature, which have strong impacts on the structure and morphology of the nanoparticles, were investigated. Upconversion mechanism and factors that affect the fluorescent performance of the NaYF4:Yb, Tm nanoparticles were discussed. Besides the strong emission around 474 nm, a much more intense emission at about 800 nm was observed emitted by NaYF4:Yb, Tm nanoparticles under 980 nm IR excitation. This strong NIR emission is favorable for the highly sensitive label used in biological detection or in vivo NIR fluorescence imaging. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：333 / 340

页数：8

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