Robust microscale superlubricity under high contact pressure enabled by graphene-coated microsphere
Citations Over TimeTop 1% of 2017 papers
Abstract
Superlubricity of graphite and graphene has aroused increasing interest in recent years. Yet how to obtain a long-lasting superlubricity between graphene layers, under high applied normal load in ambient atmosphere still remains a challenge but is highly desirable. Here, we report a direct measurement of sliding friction between graphene and graphene, and graphene and hexagonal boron nitride (h-BN) under high contact pressures by employing graphene-coated microsphere (GMS) probe prepared by metal-catalyst-free chemical vapour deposition. The exceptionally low and robust friction coefficient of 0.003 is accomplished under local asperity contact pressure up to 1 GPa, at arbitrary relative surface rotation angles, which is insensitive to relative humidity up to 51% RH. This ultralow friction is attributed to the sustainable overall incommensurability due to the multi-asperity contact covered with randomly oriented graphene nanograins. This realization of microscale superlubricity can be extended to the sliding between a variety of two-dimensional (2D) layers.
Related Papers
- → The effect of non‐uniform microscale distribution of sorption sites on solute diffusion in soil(2016)11 cited
- → The development of a microscale strain measurement system applied to sheet bulge hydroforming(2014)9 cited
- → The Study of Microscale Effect Assessment in Micro Forming(2014)
- PRACTICAL APPLICATION OF MICROSCALE LABORATORY(2000)
- A Design of Microscale Chemistry Experiments(2009)