C₆₀ molecules (green) adsorbed on the close-packed silver {111} surface (blue) create and occupy a periodic array of vacancy sites. See also Viewpoint in Physics. Selected for Editors' Suggestions.

From the article:

Surface Geometry of ${\mathbf{C}}_{60}$ on Ag(111)
H. I. Li, K. Pussi, K. J. Hanna, L.-L. Wang, D. D. Johnson, H.-P. Cheng, H. Shin, S. Curtarolo, W. Moritz, J. A. Smerdon, R. McGrath, and R. D. Diehl
Phys. Rev. Lett. 103, 056101 (2009)

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