Abstract
Lead selenide nanocrystals have been electrodeposited ongold(111) with a high degree of control over their dimensions,giving rise to isolated nanocrystals with differentedge-to-height aspect ratio. The electron density of states (DOS)of individual nanocrystals as a function of their aspect ratio isstudied in the regime of strong quantum confinement by electrontunnelling spectroscopy. We find a broad transition regime,spanning the two- and zero-dimensional geometry, where the DOSfunction has a rich and variable structure, featuring steps andpeaks. The experimental results are supported byelectronic-structure calculations.
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