Two scanning tunneling microscopy images of the same four single, and one cluster of, gold adatoms on a gold surface (solid background) partially covered with C₆₀ (patterned background). The image on the right, taken with a C₆₀ tip, reveals submolecular structure at the adatoms. See also Physical Review Focus story. Selected for Editors' Suggestions.

From the article:

Passing Current through Touching Molecules
Guillaume Schull, Thomas Frederiksen, Mads Brandbyge, and Richard Berndt
Phys. Rev. Lett. 103, 206803 (2009)

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