Issue 22, 2011
From the journal:

Journal of Materials Chemistry

Is black iron oxide nanoparticle always a light absorber?

Feng Chen,a   Wenbo Bu,*a   Lingxia Zhang,a   Yuchi Fanb  and  Jianlin Shi*a  

* Corresponding authors

a State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics Chinese Academy of Sciences 1295, Ding-xi Road, Shanghai, China
E-mail: jlshi@sunm.shcnc.ac.cn, wbbu@mail.sic.ac.cn
Fax: +86-21-52413122
Tel: +86-21-52412712

b Department of Materials Processing, Graduate School of Engineering, Tohoku University, Sendai, Japan

Abstract

Here we report the presence of an unexpected fluorescence enhancement zone (E-zone) in the mechanically mixed system of superparamagnetic iron oxide nanoparticles (SPIONs) and upconversion fluorescent nanoparticles (UCNPs). This new finding differs from the traditional consideration that black SPIONs are always strong light absorbers. Our study also showed that the quenching behavior of UCNPs in the quenching zone (Q-zone) by SPIONs is surface state-dependent, with a lower quenching effect when UCNPs was shielded with a hydrophilic silica shell.

Graphical abstract: Is black iron oxide nanoparticle always a light absorber?

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Article information

DOI
https://doi.org/10.1039/C1JM10437C
Article type
Paper
Submitted
28 Jan 2011
Accepted
24 Mar 2011
First published
26 Apr 2011

J. Mater. Chem., 2011,21, 7990-7995

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Is black iron oxide nanoparticle always a light absorber?

F. Chen, W. Bu, L. Zhang, Y. Fan and J. Shi, J. Mater. Chem., 2011, 21, 7990 DOI: 10.1039/C1JM10437C

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