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Synthesis and Structural Characterization of Ferromagnetic Au/Co Nanoparticles

Published online by Cambridge University Press:  03 June 2014

Nabraj Bhattarai ,
Subarna Khanal ,
Daniel Bahena ,
Robert L. Whetten  and
Miguel Jose-Yacaman
Nabraj Bhattarai*
Affiliation:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
Subarna Khanal
Affiliation:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
Daniel Bahena
Affiliation:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
Robert L. Whetten
Affiliation:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
Miguel Jose-Yacaman
Affiliation:
Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX 78249, USA.
*
*[email protected]
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Abstract

The synthesis of bimetallic magnetic nanoparticles is very challenging because of the agglomeration and non-uniform size. In this paper, we present the synthesis of monodispersed 3-5 nm sized thiolated bimetallic alloyed Au/Co nanoparticles with decahedral and icosahedral shape, their characterization using Cs-corrected scanning transmission electron microscopy (STEM) and magnetic measurements using superconducting quantum interference device (SQUID) magnetometer. The Z-contrast imaging and energy dispersive X-ray spectroscopy (EDS) mapping showed an inhomogeneous alloying with minor segregation between Au and Co at nanoscale and the SQUID measurement exhibited the ferromagnetic behavior.

Keywords

magnetic propertiesscanning transmission electron microscopy (STEM)ferromagnetic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1708: Symposium VV – Magnetic Nanomaterials and Nanostructures , 2014 , mrss14-1708-vv06-03
Copyright
Copyright © Materials Research Society 2014 

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References

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