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A density functional global optimisation study of neutral 8-atom Cu-Ag and Cu-Au clusters

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Abstract

The effect of doping on the energetics and dimensionality of eight atom coinage metal subnanometre particles is fully resolved using a genetic algorithm in tandem with on the fly density functional theory calculations to determine the global minima (GM) for Cu n Ag(8−n) and Cu n Au(8−n) clusters. Comparisons are made to previous ab initio work on mono- and bimetallic clusters, with excellent agreement found. Charge transfer and geometric arguments are considered to rationalise the stability of the particular permutational isomers found. An interesting transition between three dimensional and two dimensional GM structures is observed for copper-gold clusters, which is sharper and appears earlier in the doping series than is known for gold-silver particles.

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Authors and Affiliations

  1. School of Chemistry, University of Birmingham, Edgbaston, Birmingham, UK

    Christopher J. Heard & Roy L. Johnston

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  1. Christopher J. Heard
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  2. Roy L. Johnston
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Correspondence to Christopher J. Heard.

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Heard, C., Johnston, R. A density functional global optimisation study of neutral 8-atom Cu-Ag and Cu-Au clusters. Eur. Phys. J. D 67, 34 (2013). https://doi.org/10.1140/epjd/e2012-30601-7

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  • DOI: https://doi.org/10.1140/epjd/e2012-30601-7

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