Thermal stabilty of graphene on Re
Photoelectron spectroscopy and density functional calculations were used to investigate the complex relationship between graphene corrugation and its thermal stability in a model system where graphene interacts strongly with the substrate, Re(0001). LEEM and microprobe-LEED were exploited to address the growth and structure of graphene.
E. Miniussi et al., Phys. Rev. Lett.106, 216101 (2011).
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This study reports on a novel approach to determine the relationship between the corrugation and the thermal stability of epitaxial graphene grown on a strongly interacting substrate. According to density functional theory calculations, the C single layer grown on Re(0001) is strongly corrugated, with a buckling of 1.6 Å, yielding a simulated C 1s core level spectrum which is in excellent agreement with the experimental one. We found that corrugation is closely knit with the thermal stability of the C network: C-C bond breaking is favored in the strongly buckled regions of the moiré cell, though it requires the presence of diffusing graphene layer vacancies. Our data shows that there is a close relationship between graphene corrugation and its |
thermal stability, a key achievement in sight of the potential high temperature applications of supported graphene. Retrieve article
Thermal Stability of Corrugated Epitaxial Graphene Grown on Re(0001); |
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