Nanospectroscopy highlights
- Nanospectroscopy highlights
- Subfilamentary Networks in Memristive Devices
- Graphene and h-BN by a Single Molecular Precursor
- Fabrication of 2D heterojunction in graphene
- Island Ripening in a catalytic reaction
- Nanobubbles at GPa pressure under graphene
- Edge specific graphene nanoribbons
- Imaging the way molecules desorb from catalysts
- Towards the perfect graphene membrane
- Rippling of graphene on Ir(100)
- Thinnest loadstone ever
- Thermal stability of Graphene on Re(001)
- Stress Engineering at the Nanometer Scale
- Image blur in XPEEM
- AFM domain imaging using LEEM
- ARPES on corrugated graphene
- Corrugation in Exfoliated Graphene
- Domain-Wall Depinning by Spin Currents
- Tutte le pagine
Towards the perfect graphene membrane
We investigated the limiting factors affecting the crystal quality of graphene grown on polycrystalline Cu foils, a promising new system for applications in large-scale graphene production. The first important result of this study is that a high temperature hydrogen pretreatment of the Cu foil lowers considerably the nucleation density of graphene crystals, favoring the growth of large single crystalline graphene flakes. Second, a characterization of the morphology and structure of the Cu support was performed. The faceting of the substrate involves ordered sequences of (100)- and (410)-facets, interrupted by further highly inclined planes, consisting of (n11) - type facets. The alignment of the graphene layer has no influence on the restructuring of the Cu foil. Despite the fact that the interaction of graphene on the Cu substrate is weak, the graphene layer was found to be a replica of the former morphology of the faceted Cu |
substrate. This structure even persists if suspended graphene membranes are formed when carefully removing locally the Cu support underneath the monolayer graphene. As a result, graphene based membranes or transferred graphene layers, which have been grown on Cu foils, are intrinsically corrugated. Retrieve article
Towards the perfect graphene membrane? - Improvement and limits during formation of high quality graphene grown on Cu-foils; |