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The lowest energy structures of Au₍ (n0ex{0ex}=0ex{0ex}38, 55, 75) nanoclusters are obtained by unconstrained dynamical and genetic-symbiotic optimization methods, using a Gupta n-body potential. A set of amorphous structures, nearly degenerate in energy, are found as the most stable configurations. Some crystalline or quasicrystalline isomers are also minima of the cluster potential energy surface with similar energy. First principles calculations using density functional theory confirm these results and give different electronic properties for the ordered and disordered gold cluster isomers.
Garzón et al. (Mon,) studied this question.