Monodisperse silica-coated polyvinylpyrrolidone/NaYF4 nanocrystals with multicolor upconversion fluorescence emission

被引：452

作者：

Li, Zhengquan

Zhang, Yong

机构：

[1] Natl Univ Singapore, Fac Engn, Div Bioengn, Singapore 117576, Singapore

[2] Natl Univ Singapore, Singapore MIT Alliance, Singapore 117576, Singapore

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2006年 / 45卷 / 46期

关键词：

crystal growth; fluorescence; lanthanides; nanocrystals; polyvinylpyrrolidone;

D O I：

10.1002/anie.200602975

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

(Figure Presented) In full color: Ultrafine lanthanide-doped polyvinylpyrrolidone/NaYF4 nanocrystals with narrow size distribution were synthesized and found to disperse well in water and many organic solvents. Silica was coated onto the nanocrystals to form a uniform thin layer. Highly efficient upconversion fluorescence was observed from both uncoated and silica-coated PVP/NaYF4 nanocrystals doped with Yb/ Er or Yb/Tm (see picture). © 2006 Wiley-VCH Verlag GmbH & Co. KGaA.

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页码：7732 / 7735

页数：4

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