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Transmission Electron Microscopy Study of Gold-Coated Iron Core-Shell and Au/Fe/Au Onion-Like Nanoparticles Synthesized using Reverse Micelles

Published online by Cambridge University Press:  21 February 2011

W.L. Zhou ,
E.E. Carpenter ,
J. Sims ,
A. Kumbhar  and
C.J. O'Connor
W.L. Zhou
Affiliation:
Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148
E.E. Carpenter
Affiliation:
Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148
J. Sims
Affiliation:
Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148
A. Kumbhar
Affiliation:
Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148
C.J. O'Connor
Affiliation:
Advanced Materials Research Institute, University of New Orleans, New Orleans, LA 70148
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Abstract

Gold-coated iron core-shell structure and Au/Fe/Au onion-like nanoparticles synthesized using reverse micelles were characterized by transmission electron microscopy (TEM). The average nanoparticle size of the core-shell structure is about 8 nm, with about 6 nm diameter core and 2 nm shell. The gold shell structure can be resolved from both high resolution electron microscopy (HREM) image and energy dispersive X-ray spectrum (EDS). Even though the gold and iron electron diffraction rings overlap a little bit, they can still be identified due to the slight mismatch of the diffraction rings. The Au/Fe/Au onion-like nanoparticles were also observed. The nanoparticles were formed with about 6 nm diameter gold core, 1 nm iron interlayer and 2 nm gold shell. The shell structure coated on the core appeared unhomogeneous, however, in both cases the iron core and interlayer iron shell stay air-stable.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 581: Symposium F – Nanophase & Nanocomposite Materials II , 1999 , 107
Copyright
Copyright © Materials Research Society 2000

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References

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