Non-Amontons frictional behaviors of grain boundaries at layered material interfaces

Yiming Song, Xiang Gao, Rémy Pawlak, Shuyu Huang, Antoine Hinaut, Thilo Glatzel, Oded Hod (), Michael Urbakh () and Ernst Meyer ()
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Yiming Song: University of Basel
Xiang Gao: Tel Aviv University
Rémy Pawlak: University of Basel
Shuyu Huang: University of Basel
Antoine Hinaut: University of Basel
Thilo Glatzel: University of Basel
Oded Hod: Tel Aviv University
Michael Urbakh: Tel Aviv University
Ernst Meyer: University of Basel

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Against conventional wisdom, corrugated grain boundaries in polycrystalline graphene, grown on Pt(111) surfaces, are shown to exhibit negative friction coefficients and non-monotonic velocity dependence. Using combined experimental, simulation, and modeling efforts, the underlying energy dissipation mechanism is found to be dominated by dynamic buckling of grain boundary dislocation protrusions. The revealed mechanism is expected to appear in a wide range of polycrystalline two-dimensional material interfaces, thus supporting the design of large-scale dry superlubric contacts.

Date: 2024
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DOI: 10.1038/s41467-024-53581-y

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