Abstract
We studied the electronic level structure of assemblies of InAs quantum dots and CdSenanorods cross-linked by 1,4-phenylenediamine molecules using scanning tunnelingspectroscopy. We found that the bandgap in these arrays is reduced with respect to thecorresponding ligand-capped nanocrystal arrays. In addition, a pronounced sub-gapspectral structure commonly appeared which can be attributed to unpassivated nanocrystalsurface states or associated with linker-molecule-related levels. The exchange ofthe ligands by the linker molecules also affected the structural array properties.Most significantly, clusters of close-packed standing CdSe nanorods were formed.
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