By chemically modifying the FeO(111) thin film on Pt(111), it was shown that it

was possible to unambiguously correlate its STM morphology with its underlying

structure without recourse to STM simulations. Partial reduction of the oxide

surface leads to the formation of triangularly-shaped oxygen vacancy dislocation

loops at specific sites in the moiré structure of the film. Their presence allows

unambiguous identification of the high-symmetry domains of the moiré structure,

whose differing chemical properties govern the templating effect on adsorbed

metal atoms, clusters and molecules.

Correlating STM Contrast and Atomic-Scale Structure by Chemical Modification:

Vacancy Dislocation Loops on FeO/Pt(111). L.R.Merte, J.Knudsen, L.C.Grabow,

R.T.Vang, E.Lægsgaard, M.Mavrikakis, F.Besenbacher: Surface Science, 2009,

603[2], L15-8