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      Graphene on Ni(111): Electronic Corrugation and Dynamics from Helium Atom Scattering

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          Abstract

          Using helium atom scattering, we have studied the structure and dynamics of a graphene layer prepared in situ on a Ni(111) surface. Graphene/Ni(111) exhibits a helium reflectivity of ∼20% for a thermal helium atom beam and a particularly small surface electron density corrugation ((0.06 ± 0.02) Å peak to peak height). The Debye–Waller attenuation of the elastic diffraction peaks of graphene/Ni(111) and Ni(111) was measured at surface temperatures between 150 and 740 K. A surface Debye temperature of θ D = (784 ± 14) K is determined for the graphene/Ni(111) system and θ D = (388 ± 7) K for Ni(111), suggesting that the interlayer interaction between graphene and the Ni substrate is intermediary between those for strongly interacting systems like graphene/Ru(0001) and weakly interacting systems like graphene/Pt(111). In addition we present measurements of low frequency surface phonon modes on graphene/Ni(111) where the phonon modes of the Ni(111) substrate can be clearly observed. The similarity of these findings with the graphene/Ru(0001) system indicates that the bonding of graphene to a metal substrate alters the dynamic properties of the graphene surface strongly and is responsible for the high helium reflectivity of these systems.

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          Graphene on metal surfaces

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            Atomic beam diffraction from solid surfaces

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              The scattering of helium atoms from surfaces

              J L Beeby (1971)
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                Author and article information

                Journal
                J Phys Chem C Nanomater Interfaces
                J Phys Chem C Nanomater Interfaces
                jy
                jpccck
                The Journal of Physical Chemistry. C, Nanomaterials and Interfaces
                American Chemical Society
                1932-7447
                1932-7455
                22 October 2015
                19 November 2015
                : 119
                : 46
                : 25983-25990
                Affiliations
                []Cavendish Laboratory , J. J. Thompson Avenue, Cambridge CB3 0HE, United Kingdom
                []Institut Laue-Langevin , 71 Avenue des Martyrs, 38000 Grenoble, France
                Author notes
                Article
                10.1021/acs.jpcc.5b08284
                4655418
                1f80cc5f-8cfb-486b-831f-9e35819530f1
                Copyright © 2015 American Chemical Society

                This is an open access article published under a Creative Commons Attribution (CC-BY) License, which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited.

                History
                : 25 August 2015
                : 22 October 2015
                Categories
                Article
                Custom metadata
                jp5b08284
                jp-2015-08284e

                Thin films & surfaces
                Thin films & surfaces

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