| AVS 59th Annual International Symposium and Exhibition | |
| Applied Surface Science | Tuesday Sessions |
| Session AS-TuP |
| Session: | Applied Surface Science Poster Session |
| Presenter: | H.M. Meyer III, Oak Ridge National Laboratory |
| Authors: | H.M. Meyer III, Oak Ridge National Laboratory I. Vlassiouk, Oak Ridge National Laboratory A.V. Sumant, Argonne National Laboratory |
| Correspondent: | Click to Email |
Graphene has received unprecedented attention since 2010 when the Nobel Prize was awarded to Geim and Novoselov for “groundbreaking experiments regarding the two-dimensional material graphene.” Many graphene-related publications use the C 1s spectrum to demonstrate the existence or formation of graphene, but unique photoemission spectral signatures are difficult due to the inherent thinness of single or even multi-layer graphene. The difficulty is due to the surface sensitivity of XPS and Auger spectra and the analysis of spectra that include graphene, substrate-related carbon and possible adsorbed carbonaceous material on the graphene. This poster explores various XPS and Auger spectral features from studies of graphene grown by the CVD method on Cu (near-single layer) and Ni (multi-layer). In one study, graphene grown on Cu was heated in air to determine if the graphene provided any protection to the underlying Cu substrate. The results indicated not only oxidation (i.e. corrosion) protection, but that there was a time and heat dependence of the protection. To aid in the understanding of graphene vs. substrate contributions to the C 1s XPS spectrum, additional studies were performed on CVD-grown diamond substrates. Diamond substrates (very low oxygen and pure sp3-type carbon) offer an interesting contrast to most substrates that have inherent O and C contributions to the O 1s and C1s spectra. Unique XPS and Auger related features of graphene will be highlighted in this poster.