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Titel: Contrast in nanoscale friction between rotational domains of graphene on Pt (111)
VerfasserIn: Chan, Nicholas
Balakrishna, S. G.
Klemenz, Andreas
Moseler, Michael
Egberts, Philip
Bennewitz, Roland
Sprache: Englisch
Titel: Carbon : an international journal sponsored by the American Carbon Society
Bandnummer: 113
Startseite: 132
Endseite: 138
Verlag/Plattform: Elsevier
Erscheinungsjahr: 2017
Dokumenttyp: Journalartikel / Zeitschriftenartikel
Abstract: The nanoscale lubrication properties of graphene depend on chemical functionalization, adsorbants, and bonding to the substrate. The dependence of friction on the rotational orientation of graphene on a Pt(111) surface was studied by high-resolution friction force microscopy in ultra-high vacuum and interpreted through complementary simulations. Lateral forces reveal an atomic-scale stick-slip motion with the periodicity of the graphene structure. Additionally, the lateral forces were modulated by a Moiré pattern, which depends on the rotation of the respective domain. Comparing the experimental results to simulations of the friction process based on the Prandtl-Tomlinson model and to atomistic simulations of the tip-sample interactions, it was found that the modulation of lateral forces originated from a structural mismatch between Pt(111) and graphene domains that were locally pinned to the substrate. Domains with preferred orientations, such as the R1° and the R24°, appeared to exhibit lower average friction than those with orientations less frequently observed, such as the R10° domain.
DOI der Erstveröffentlichung: 10.1016/j.carbon.2016.11.016
Link zu diesem Datensatz: hdl:20.500.11880/28083
http://dx.doi.org/10.22028/D291-29276
ISSN: 0008-6223
Datum des Eintrags: 14-Okt-2019
Fakultät: NT - Naturwissenschaftlich- Technische Fakultät
Fachrichtung: NT - Physik
Professur: NT - Keiner Professur zugeordnet
Sammlung:SciDok - Der Wissenschaftsserver der Universität des Saarlandes

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