| AVS 58th Annual International Symposium and Exhibition | |
| Surface Science Division | Friday Sessions |
| Session SS-FrM |
| Session: | Surface Science on Graphene |
| Presenter: | Bogdan Diaconescu, University of New Hampshire |
| Authors: | B. Diaconescu, University of New Hampshire F. Hagelberg, East Tennessee State University K. Pohl, University of New Hampshire |
| Correspondent: | Click to Email |
Graphene has aroused tremendous interest due to its remarkable electronic and mechanical properties. The lack of a band-gap, however, causes a serious challenge for implementing graphene as a material for electrical switches and therefore creative ways of inducing this band-gap are needed. We will present a STM/LEED/DFT study of the monolayer graphene on Ru(0001) system in the presence of hydrogen. STM reveals a diverse array of Moiré superlattice sizes ranging from 0.9 to 2.4 nm in the presence of hydrogen adlayer structures, as confirmed by LEED. Density functional theory calculations show a correlation between the Moiré superstructure sizes and the hydrogen coverage and the opening of a band-gap in the graphene/H/Ru(0001) system for some of the Moiré/hydrogen adlayer coverages.
This work was supported by the Nanoscale Science and Engineering Center for High-rate Nanomanufacturing (NSF NSEC-425826) and NSF DMR-1006863.