Solid-source growth and atomic-scale characterization of graphene on Ag(111)

Brian Kiraly, Erin V. Iski, Andrew J. Mannix, Brandon L. Fisher, Mark C. Hersam and Nathan P. Guisinger ()
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Brian Kiraly: Center for Nanoscale Materials, Argonne National Laboratory
Erin V. Iski: Center for Nanoscale Materials, Argonne National Laboratory
Andrew J. Mannix: Center for Nanoscale Materials, Argonne National Laboratory
Brandon L. Fisher: Center for Nanoscale Materials, Argonne National Laboratory
Mark C. Hersam: Northwestern University
Nathan P. Guisinger: Center for Nanoscale Materials, Argonne National Laboratory

Nature Communications, 2013, vol. 4, issue 1, 1-7

Abstract: Abstract Silver is a desirable platform for graphene growth because of the potential for hybrid graphene plasmonics and its emerging role as a preferred growth substrate for other two-dimensional materials, such as silicene. Here we demonstrate the direct growth of monolayer graphene on a single-crystal Ag(111) substrate. The inert nature of Ag has made it difficult to use for graphene synthesis using standard chemical vapour deposition techniques, which we have overcome by using an elemental carbon source. Atomic-scale scanning tunnelling microscopy reveals that the atomically clean graphene–silver substrate is free of organic residue and other contaminants. The dendritic graphene possesses a variety of edge terminations, many of which give rise to quantum interferences previously seen only on insulating substrates. This scattering supports spectroscopic evidence that the graphene electronic structure is minimally perturbed by the underlying silver, providing a new system in which graphene is decoupled from its growth substrate.

Date: 2013
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DOI: 10.1038/ncomms3804

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