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Atomic scale mechanisms of friction reduction and wear protection by graphene

Klemenz, Andreas; Pastewka, Lars; Balakrishna, Soorali Ganeshamurthy; Caron, Arnaud; Bennewitz, Roland; Moseler, Michael

We study nanoindentation and scratching of graphene-covered Pt(111) surfaces in computer simulations and experiments. We find elastic response at low load, plastic deformation of Pt below the graphene at intermediate load, and eventual rupture of the graphene at high load. Friction remains low in the first two regimes, but jumps to values also found for bare Pt(111) surfaces upon graphene rupture. While graphene substantially enhances the load carrying capacity of the Pt substrate, the substrate's intrinsic hardness and friction are recovered upon graphene rupture.

Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Jahr 2014
Sprache Englisch
Identifikator DOI: 10.1021/nl5037403
ISSN: 1530-6984
KITopen ID: 1000050677
Erschienen in Nano Letters
Band 14
Heft 12
Seiten 7145-7152
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