Publikationsliste
| Authors | Hermes, I.; Krotkus, S.; Klasen, A.; Pasko, S.; Heuken, M. |
|---|---|
| Title |
Wafer-scale graphene on sapphire
How the substrate topography affects graphene’s electronic landscape |
| Date | 26.07.2023 |
| Number | 0 |
| Abstract | Implementation of graphene into electronic devices requires wafer-scale fabrication of high-quality monolayers on insulating substrates. Here, we took a glance into the nanoscale electronic distribution of monolayer graphene grown on etched sapphire using sideband Kelvin probe force microscopy and observed a distinct correlation between the underlying substrate topography and the surface potential of graphene. We believe partial delamination of the monolayer around step edges locally reduces an adverse graphene-substrate interaction via hydroxyl groups, which results in a decreased surface potential and increased conductivity on the delaminated graphene. Graphene wrinkles, on the other hand, featured a variety of different potential distributions - likely depending on their individual folding structure. |
| Publisher | Imaging and microscopy |
| Wikidata | |
| Citation | Imaging and Microscopy 25 (2023) 2-4 |
| DOI | https://analyticalscience.wiley.com/do/10.1002/was.0004000396 |
| Tags |