Abstract
A novel layer-by-layer cubic growth pathway involving ${\mathrm{C}}_{2}$ dimers is advanced for large titanium carbide clusters based on observation of new magic numbers in the anions. This growth mechanism explains uniquely all the magic numbers in a multicage growth model previously proposed for large metal carbide clusters, suggesting that the cubic structures, characteristic of the bulk carbide lattices, dominate growth of the large carbide clusters. Experimental and theoretical evidence indicates that the cubic layered growth with ${\mathrm{C}}_{2}$ dimers can lead to a new type of highly stable one-dimensional quantum wires.
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