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Synthesis and Structural Characterization of Ferromagnetic Au/Co Nanoparticles

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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.

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Acknowledgments

The author would like to acknowledge the funding from NSF grants DMR-1103730, Graduate School UTSA, Prof. M.M. Mariscal, Dr. G. Ajithkumar, Prof. S. Mejia, and Prof. V. Dravid for valuable discussion.

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Authors and Affiliations

  1. Department of Physics and Astronomy, University of Texas at San Antonio, One UTSA Circle, San Antonio, TX, 78249, USA

    Nabraj Bhattarai, Subarna Khanal, Daniel Bahena, Robert L. Whetten & Miguel Jose-Yacaman

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  1. Nabraj Bhattarai
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  2. Subarna Khanal
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  3. Daniel Bahena
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  4. Robert L. Whetten
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  5. Miguel Jose-Yacaman
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Correspondence to Nabraj Bhattarai.

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Bhattarai, N., Khanal, S., Bahena, D. et al. Synthesis and Structural Characterization of Ferromagnetic Au/Co Nanoparticles. MRS Online Proceedings Library 1708, 43–50 (2014). https://doi.org/10.1557/opl.2014.526

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  • DOI: https://doi.org/10.1557/opl.2014.526

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