Redispersible and water-soluble LaF3:Ce,Tb nanocrystalsvia a microfluidic reactor with temperature steps

Xiaoxu Zhu; Qinghong Zhang; Yaogang Li; Hongzhi Wang

doi:10.1039/B812473F

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Redispersible and water-soluble LaF₃:Ce,Tb nanocrystalsvia a microfluidic reactor with temperature steps†

Xiaoxu Zhu,^a Qinghong Zhang,^b Yaogang Li*^b and Hongzhi Wang*^a

Author affiliations

* Corresponding authors

^a State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, Shanghai, People's Republic of China

^b Engineering Research Center of Advanced Glasses Manufacturing Technology, MOE, Donghua University, Shanghai, People's Republic of China

Abstract

A capillary microreactor with a design of steep temperature steps was utilized for the preparation of LaF₃:Ce, Tb nanocrystals using diethylene glycol (DEG) as solvent, towards separation of nucleation and growth of crystallization. The redispersible and water-soluble nanoparticles consisted of well crystallized hexagonal phases with spherical shape, a mean diameter of about 3.5 nm and a photoluminescence quantum yield of 49%, and hold great promise for potential application in bio-labels. Our results confirmed that it is possible to use a high temperature to burst nuclei and a low temperature to promote growth through a temperature-step microreactor.

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Supplementary files

Experimental details, curves of steep temperature steps,characterization, UV-visible spectrum, FT-IR spectrum, TEM image ofsample 2 and chromophotographs PDF (748K)

Article information

DOI: https://doi.org/10.1039/B812473F
Article type: Communication
Submitted: 23 Jul 2008
Accepted: 23 Sep 2008
First published: 06 Oct 2008

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J. Mater. Chem., 2008,18, 5060-5062

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Redispersible and water-soluble LaF₃:Ce,Tb nanocrystalsvia a microfluidic reactor with temperature steps

X. Zhu, Q. Zhang, Y. Li and H. Wang, J. Mater. Chem., 2008, 18, 5060 DOI: 10.1039/B812473F

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Journal of Materials Chemistry