Issue 30, 2011
From the journal:

Journal of Materials Chemistry

A facile method to synthesize superparamagnetic and up-conversion luminescent NaYF4:Yb, Er/Tm@SiO2@Fe3O4 nanocomposite particles and their bioapplication

Dan Hu,a   Min Chen,a   Yuan Gao,b   Fuyou Lib  and  Limin Wu*ab  

* Corresponding authors

a Department of Materials Science, Fudan University, Shanghai, P. R. China
E-mail: lmw@fudan.edu.cn

b Advanced Materials Laboratory, Fudan University, Shanghai, P. R. China

Abstract

This paper presents a facile method for the fabrication of core-shell-structured NaYF4:Yb, Er/Tm@SiO2@Fe3O4 nanocomposite particles (NCPs). In this approach, when the EDTA-capped NaYF4:Yb, Er/Tm nanoparticles were mixed with the oleic acid-modified magnetic Fe3O4 nanoparticles in isopropyl alcohol, followed by addition of TEOS and ammonium hydroxide, core-shell NaYF4:Yb, Er/Tm@SiO2@Fe3O4 NCPs were directly yielded; neither surface modification nor high temperature was needed. The obtained NCPs have very good superparamagnetic and luminescent properties. Preliminary investigation of incubating with HeLa cells displays that the NCPs are easily swallowed and can be used in bioimaging.

Graphical abstract: A facile method to synthesize superparamagnetic and up-conversion luminescent NaYF4:Yb, Er/Tm@SiO2@Fe3O4 nanocomposite particles and their bioapplication

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Article information

DOI
https://doi.org/10.1039/C1JM11172H
Article type
Paper
Submitted
19 Mar 2011
Accepted
18 May 2011
First published
28 Jun 2011

J. Mater. Chem., 2011,21, 11276-11282

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A facile method to synthesize superparamagnetic and up-conversion luminescent NaYF4:Yb, Er/Tm@SiO2@Fe3O4 nanocomposite particles and their bioapplication

D. Hu, M. Chen, Y. Gao, F. Li and L. Wu, J. Mater. Chem., 2011, 21, 11276 DOI: 10.1039/C1JM11172H

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