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doi:10.22028/D291-29276
Title: | Contrast in nanoscale friction between rotational domains of graphene on Pt (111) |
Author(s): | Chan, Nicholas Balakrishna, S. G. Klemenz, Andreas Moseler, Michael Egberts, Philip Bennewitz, Roland |
Language: | English |
Title: | Carbon : an international journal sponsored by the American Carbon Society |
Volume: | 113 |
Startpage: | 132 |
Endpage: | 138 |
Publisher/Platform: | Elsevier |
Year of Publication: | 2017 |
Publikation type: | Journal Article |
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 of the first publication: | 10.1016/j.carbon.2016.11.016 |
Link to this record: | hdl:20.500.11880/28083 http://dx.doi.org/10.22028/D291-29276 |
ISSN: | 0008-6223 |
Date of registration: | 14-Oct-2019 |
Faculty: | NT - Naturwissenschaftlich- Technische Fakultät |
Department: | NT - Physik |
Professorship: | NT - Keiner Professur zugeordnet |
Collections: | SciDok - Der Wissenschaftsserver der Universität des Saarlandes |
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