Abstract
Publisher Summary This chapter discusses the magic numbers for shells of electrons and shells of atoms in binary clusters. It reviews recent studies of small binary clusters, with less than 100 atoms per clusters. Because of these small sizes, many of the species can be considered as molecules, implying the use of molecular language when describing their structure. In that review, the chapter combines this with terminology borrowed from condensed matter physics. There is a concise description of how binary clusters are produced and a summary of relevant cluster models, respectively. In addition, three types of binary cluster systems are reviewed: electronegatively doped main group metals, transition-metal-doped noble metals, and metal-doped semi-metal clusters. In all three cases, special attention is given to binary systems in which the interplay between electronic shell closing and specific geometries gives rise to pronounced or exceptional physico-chemical (stability, reactivity, and magnetic.) properties.
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