Correlating STM contrast and atomic-scale structure by chemical modification: Vacancy dislocation loops on FeO/Pt(1 1 1)

By chemically modifying the FeO(1 1 1) thin film on Pt(1 1 1), we show that it is 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 vaca...

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Bibliographic Details
Published in:Surface science 2009-01, Vol.603 (2), p.L15-L18
Main Authors: Merte, L.R., Knudsen, J., Grabow, L.C., Vang, R.T., Lægsgaard, E., Mavrikakis, M., Besenbacher, F.
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Condensed matter: structure, mechanical and thermal properties
Cross-disciplinary physics: materials science
rheology
DISLOCATIONS
Environmental Molecular Sciences Laboratory
Exact sciences and technology
Iron
IRON OXIDES
MATERIALS SCIENCE
Moiré superstructure
MORPHOLOGY
Oxides
Physics
PLATINUM
Reduction
Scanning tunneling microscopy
Surface electronic phenomena
Thin film structure
THIN FILMS
VACANCIES
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Summary:By chemically modifying the FeO(1 1 1) thin film on Pt(1 1 1), we show that it is 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.
ISSN:0039-6028
1879-2758
DOI:10.1016/j.susc.2008.11.014