Issue 10, 2010
From the journal:

Nanoscale

A new CoFe2O4–Cr2O3–SiO2 fluorescent magnetic nanocomposite

Chandan Borgohain,ab   Kula Kamal Senapati,ab   Debabrata Mishra,b   Kanak Ch. Sarmac  and  Prodeep Phukan*a  

* Corresponding authors

a Department of Chemistry, Gauhati University, Guwahati, 781014 Assam, India
E-mail: pphukan@yahoo.com
Fax: +91-361-2700311
Tel: +91-361-2570535

b Indian Institute of Technology Guwahati, Guwahati, 781039 Assam, India

c Department of Instrumentation and USIC, Gauhati University, Guwahati, Assam, India

Abstract

A combined sonochemical co-precipitaion method has been developed for the synthesis of a CoFe2O4–Cr2O3–SiO2 magnetic nanocomposite. The synthesis involved the pre-synthesis of CoFe2O4–Cr2O3 nanoparticles, which were subsequently coated with SiO2 by treatment with tetraethyl orthosilicate. It was observed that the as-prepared CoFe2O4–Cr2O3–SiO2 nanocomposite exhibits photoluminescence properties without the addition of any external fluorescent marker. The fluorescent magnetic nanoparticles (FMNPs) had a typical diameter of 30 ± 5 nm and a saturation magnetization of 5.1 emu g-1 at room temperature. This as-prepared nanocomposite was used for staining cultured HeLa cells for fluorescence imaging.

Graphical abstract: A new CoFe2O4–Cr2O3–SiO2 fluorescent magnetic nanocomposite

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Article information

DOI
https://doi.org/10.1039/C0NR00281J
Article type
Paper
Submitted
27 Apr 2010
Accepted
02 Jul 2010
First published
10 Sep 2010

Nanoscale, 2010,2, 2250-2256

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A new CoFe2O4–Cr2O3–SiO2 fluorescent magnetic nanocomposite

C. Borgohain, K. K. Senapati, D. Mishra, K. Ch. Sarma and P. Phukan, Nanoscale, 2010, 2, 2250 DOI: 10.1039/C0NR00281J

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