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Issue 42, 2015
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Ageing of out-of-equilibrium nanoalloys by a kinetic mean-field approach

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Abstract

This study describes the ageing of bimetallic nanoparticles using a kinetic mean-field method which provides the time evolution of the concentration for each site. We consider the cuboctahedron of 309 atoms in the Cu–Ag system, which is a prototype of systems with a strong tendency to phase separate. Starting from an initial homogenous configuration, we investigate the evolution towards the equilibrium configuration at different temperatures. Surprisingly, at low temperature, the kinetics exhibits a first transition towards an onion-like configuration followed by a second transition towards the equilibrium core–shell configuration. An analysis of the kinetics of the formation and then of the dissolution of the onion-like structure allows us to identify the main paths of the kinetic process.

Graphical abstract: Ageing of out-of-equilibrium nanoalloys by a kinetic mean-field approach

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Publication details

The article was received on 30 Jan 2015, accepted on 20 Mar 2015 and first published on 30 Mar 2015


Article type: Paper
DOI: 10.1039/C5CP00600G
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Citation: Phys. Chem. Chem. Phys., 2015,17, 28193-28199
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    Ageing of out-of-equilibrium nanoalloys by a kinetic mean-field approach

    F. Berthier, A. Tadjine and B. Legrand, Phys. Chem. Chem. Phys., 2015, 17, 28193
    DOI: 10.1039/C5CP00600G

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