Lanthanide-doped NaYF4 nanocrystals in aqueous solution displaying strong up-conversion emission

被引：199

作者：

Schaefer, Helmut ^{[1
]}

Ptacek, Pavel ^{[1
]}

Koempe, Karsten ^{[1
]}

Haase, Markus ^{[1
]}

机构：

[1] Univ Osnabruck, Inst Chem, D-49069 Osnabruck, Germany

来源：

CHEMISTRY OF MATERIALS | 2007年 / 19卷 / 06期

关键词：

D O I：

10.1021/cm062385b

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：

NaYF4:Yb3+,Er3+ nanocrystals showing high colloidal solubility in water have been obtained by treating the nanocrystals with 1-hydroxyethane-1,1-diphosphonic acid (HEDP). HEDP attaches to the surface of the nanoparticles and leads to well-separated particles in aqueous solution as verified by IR spectroscopy and dynamic light scattering measurements. In addition, the surface modification with HEDP increases strongly the up-conversion efficiency of powders and aqueous colloidal solutions of the nanocrystals. These attractive features, above all the hydrophilic nature of the nanoparticles, should make them suitable especially for bio-applications.

引用

页码：1396 / 1400

页数：5

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