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Facile preparation of hydrophilic sodium yttrium fluoride nanorods using hydrophobic nanospheres as precursor

Published online by Cambridge University Press:  07 June 2012

Qingling Tao ,
Zhengquan Li ,
Yubin Zeng  and
Yong Zhang
Qingling Tao
Affiliation:
Department of Materials Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, P. R. China
Zhengquan Li*
Affiliation:
Department of Materials Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, P. R. China
Yubin Zeng
Affiliation:
Department of Materials Physics, Zhejiang Normal University, Jinhua, Zhejiang 321004, P. R. China
Yong Zhang*
Affiliation:
Department of Bioengineering, National University of Singapore, Singapore 117576
*
a)Address all correspondence to these authors. e-mail: [email protected]
b)e-mail: [email protected]
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Abstract

Synthesis of well-defined sodium yttrium fluoride (NaYF4) nanocrystals has been achieved in nonpolar solvents, but these nanocrystals possess a hydrophobic surface and need to be surface-modified for various biological applications. Development of facile aqueous solution method to synthesize one-dimensional NaYF4 with a hydrophilic surface still remains challenging. Herein, we demonstrate a simple route to prepare hydrophilic NaYF4 nanorods by using hydrophobic NaYF4 nanospheres as precursor. It is interesting to find that hydrothermal treatment of oleic acid-capped NaYF4 nanocrystals can not only induce anisotropic growth of these nanocrystals but also change their surface properties. The hydrophilic NaYF4 nanorods synthesized in this work has been well characterized and possible formation mechanism has also been discussed.

Keywords

Upconversion nanocrystalsLanthanide nanocrystalsShape-control synthesisPhotoluminescence
Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 16 , 28 August 2012 , pp. 2101 - 2105
Copyright
Copyright © Materials Research Society 2012

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