Preservation of the Pt(100) surface reconstruction after growth of a continuous layer of graphene |
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Authors: | Louis Nilsson Mie Andersen Jacob Bjerre Richard Balog Bjørk Hammer Liv Hornekær Ivan Stensgaard |
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Institution: | Department of Physics and Astronomy, and Interdisciplinary Nanoscience Center, University of Aarhus, Ny Munkegade 120, 8000 Aarhus C, Denmark |
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Abstract: | Scanning tunneling microscopy shows that a layer of graphene can be grown on the hex-reconstructed Pt(100) surface and that the reconstruction is preserved after growth. A continuous sheet of graphene can be grown across domain boundaries and step edges without loss of periodicity or change in direction. Density functional theory calculations on a simple model system support the observation that the graphene can have different rotation angles relative to the hex-reconstructed Pt surface. The graphene sheet direction can be changed by incorporating pentagon-heptagon defects giving rise to accommodation of edge dislocations. The defect formation energy and the induced buckling of the graphene have been characterized by DFT calculations. |
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