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In-situ Gold Coating of Superparamagnetic Nanoparticles by Microemulsion Method

Published online by Cambridge University Press:  17 March 2011

D. K. Kim ,
M. Mikhailova ,
M. Toprak ,
Y. Zhang ,
B. Bjelke ,
J. Kehr  and
M. Muhammed
D. K. Kim
Affiliation:
Materials Chemistry Division, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
M. Mikhailova
Affiliation:
Materials Chemistry Division, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
M. Toprak
Affiliation:
Materials Chemistry Division, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
Y. Zhang
Affiliation:
Materials Chemistry Division, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
B. Bjelke
Affiliation:
MRI-Center, Experimental Unit, Karolinska Institutet, SE-171 76 Stockholm, Sweden
J. Kehr
Affiliation:
Division of Cellular and Molecular Neurochemistry, Karolinska Institutet, SE-171 77 Stockholm, Sweden
M. Muhammed
Affiliation:
Materials Chemistry Division, Royal Institute of Technology, SE-100 44 Stockholm, Sweden
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Abstract

Monodispersed gold coated Superparamagnetic Iron Oxide Nanoparticles (SPION) were prepared in water-in-oil reverse microemulsion (μE) of CTAB (cetyltrimethyl -ammonium bromide)/octane/butanol/water and Brij@97/cyclohexane/water. Gold coated SPION were obtained in the μE system by coprecipitation of magnetite and subsequent reduction of Au on the surface of the magnetite using NaBH4. The SPION were characterized by TEM with EDX, AFM, TGA, ESA, UV-Vis spectroscopy, and SQUID at intermediate and final stages.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 704: Symposium W – Nanoparticulate Materials , 2001 , W6.28.1
Copyright
Copyright © Materials Research Society 2002

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