Preparation and characterization of Au/Co nano-alloys

In this work we attempted to prepare binary alloy nanoparticles consisting of Au and Co, which is a typical phase-separation system in a bulk phase diagram, via a vacuum co-evaporation method. The crystal structure and lattice constant of the Au/Co nano-alloys obtained were investigated by means of...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (1992) 2003-11, Vol.559, p.99-102
Main Authors: Nabika, Hideki, Mizuhata, Minoru, Kajinami, Akihiko, Deki, Shigehito, Akamatsu, Kensuke
Format: Article
Language:English
Subjects:
Catalyst
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Gold/cobalt alloy
L1 0 structure
Materials science
Phase diagrams and microstructures developed by solidification and solid-solid phase transformations
Phase diagrams of metals and alloys
Phase transition
Physics
Polyacrylonitrile
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Summary:In this work we attempted to prepare binary alloy nanoparticles consisting of Au and Co, which is a typical phase-separation system in a bulk phase diagram, via a vacuum co-evaporation method. The crystal structure and lattice constant of the Au/Co nano-alloys obtained were investigated by means of a high-resolution transmission electron microscope and selected area electron diffraction. We obtained thermodynamically stable Au/Co nano-alloys with A1 structure upon heat-treatment at a certain temperature, and a partial transition from A1 to an ordered L1 0 structure also took place. The results in the present study demonstrated the thermodynamical differences on alloying behavior between bulk and nanoscopic materials.
ISSN:1572-6657
1873-2569
DOI:10.1016/S0022-0728(03)00054-8