Wastl, Daniel S. and Weymouth, Alfred J. and Giessibl, Franz J. (2014) Atomically Resolved Graphitic Surfaces in Air by Atomic Force Microscopy. ACS NANO, 8 (5). pp. 5233-5239. ISSN 1936-0851, 1936-086X
Full text not available from this repository. (Request a copy)Abstract
Imaging at the atomic scale using atomic force microscopy in biocompatible environments is an ongoing challenge. We demonstrate atomic resolution of graphite and hydrogen-intercalated graphene on SiC in air. The main challenges arise from the overall surface cleanliness and the water layers which form on almost all surfaces. To further investigate the influence of the water layers, we compare data taken with a hydrophilic bulk-silicon tip to a hydrophobic bulk-sapphire tip. While atomic resolution can be achieved with both tip materials at moderate interaction forces, there are strong differences in force versus distance spectra which relate to the water layers on the tips and samples. Imaging at very low tip sample interaction forces results in the observation of large terraces of a naturally occurring stripe structure on the hydrogen-intercalated graphene. This structure has been previously reported on graphitic surfaces that are not covered with disordered adsorbates in ambient conditions (i.e., on graphite and bilayer graphene on SiC, but not on monolayer graphene on SiC). Both these observations indicate that hydrogen. intercalated graphene is close to an ideal graphene sample in ambient environments.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HYDROGEN STORAGE; GRAPHENE LAYERS; WATER INTERFACE; RESOLUTION; REACTIVITY; LIQUID; SUBSTRATE; MOLECULE; DOMAINS; ENERGY; atomic resolution; air; graphene; graphitic surfaces; atomic force microscopy; ambient conditions; qPlus sensor |
| Subjects: | 500 Science > 530 Physics 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Giessibl > Group Franz J. Giessibl |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 11 Nov 2019 10:07 |
| Last Modified: | 11 Nov 2019 10:07 |
| URI: | https://pred.uni-regensburg.de/id/eprint/10220 |
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