Self-assembled Ga nanoclusters form a well-ordered array on the Si(111)-7 × 7 surface. Scanning tunneling microscopy and spectroscopy map the electronic structure of these arrays at the atomic scale. In the image, the local density of states is plotted as a color map over the topography and shows a continuous 2D network of increased differential tunneling conductance connecting the nanoclusters. Q. H. Wang and M. C. Hersam, “Atomically resolved charge redistribution for Ga nanocluster arrays on the Si(111)-7x7 surface,” Small 4, 915 (2008).
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