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Nanostructuring surfaces : deconstruction of the Pt(110)-(1x2) surface by C60

The interactions at the interface between large molecules and metallic substrates have attracted considerable interest due to the development of new devices based on organic ! lms and/or functionalized inorganic molecules. When deposited on metal surfaces, the C60 (fullerene) molecule creates regularly ordered, nanometre scale holes (”nanoholes”). Grazing incidence X-ray difrraction reveals a c(4×4) reconstruction induced by C60 on a Platinum (110) surface that had initially a (1×2) type reconstruction. While the initial missing row of the (1x2) surface structure is partially deconstructed, under each fullerene we ! nd a double atomic vacancy involving the topmost Pt layers. The resulting interface is deeply modi ! ed with 75% occupancy of Pt and regularly distributed double vacancies. The orientation of the C60 molecule is compatible with a cm symmetry of the local surface, with one of the molecule’s pentagonal rings of carbons almost parallel to the surface and its hexagonal rings almost parallel to the (111) facets of the Pt nanohole. (Full text)

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