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Issue 12, 2010
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The Co–Au interface in bimetallic nanoparticles: a high resolution STEM study

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Abstract

We report the formation of Au/Co nanoparticles and their characterization by aberration (Cs) corrected scanning transmission electron microscopy (STEM). The nanoparticles were synthesized by inert gas condensation, forming initially core-shell and bimetallic crystals. However, after thermal treatment at normal atmospheric conditions, the Co nanoparticles changed their morphology into a fine layer forming a perfect interface with the gold. The ordering of the zone rich in Co presents a fcc arrangement matching the gold lattice. The atomic analysis on the interface and the comparison of the STEM images with numerical simulations corroborated the atomic substitution of gold by cobalt.

Graphical abstract: The Co–Au interface in bimetallic nanoparticles: a high resolution STEM study

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Publication details

The article was received on 14 Jul 2010, accepted on 01 Sep 2010 and first published on 13 Oct 2010


Article type: Paper
DOI: 10.1039/C0NR00498G
Nanoscale, 2010,2, 2647-2651

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    The Co–Au interface in bimetallic nanoparticles: a high resolution STEM study

    A. Mayoral, S. Mejía-Rosales, M. M. Mariscal, E. Pérez-Tijerina and M. José-Yacamán, Nanoscale, 2010, 2, 2647
    DOI: 10.1039/C0NR00498G

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