Single Gold Atoms on Magnetite

Scanning tunneling microscopy image of single gold atoms (yellow) on a magnetite surface (blue). Elongated white protrusions betray the presence of hydrogen on the surface. See: Z. Novotný, G. Argentero, Z. Wang, M. Schmid, U. Diebold, G. S. Parkinson, Ordered array of single adatoms with remarkable thermal stability: Au/Fe3O4(001). Phys. Rev. Lett. 108 (2012) 216103