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doi:10.22028/D291-29276
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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