Atomic Scale Mechanisms of Friction Reduction and Wear Protection by Graphene
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- 作者：Andreas Klemenz ; Lars Pastewka ; S. G. Balakrishna ; Arnaud Caron ; Roland Bennewitz ; Michael Moseler
- 刊名：Nano Letters
- 出版年：2014
- 出版时间：December 10, 2014
- 年：2014
- 卷：14
- 期：12
- 页码：7145-7152
- 全文大小：443K
- ISSN：1530-6992
文摘
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鈥檚 intrinsic hardness and friction are recovered upon graphene rupture.