Understanding the friction of atomically thin layered materials

@article{Andersson2020UnderstandingTF,
  title={Understanding the friction of atomically thin layered materials},
  author={David Andersson and Astrid S. de Wijn},
  journal={Nature Communications},
  year={2020},
  volume={11}
}
Friction is a ubiquitous phenomenon that greatly affects our everyday lives and is responsible for large amounts of energy loss in industrialised societies. Layered materials such as graphene have interesting frictional properties and are often used as (additives to) lubricants to reduce friction and protect against wear. Experimental Atomic Force Microscopy studies and detailed simulations have shown a number of intriguing effects such as frictional strengthening and dependence of friction on… 
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References

SHOWING 1-10 OF 61 REFERENCES
The evolving quality of frictional contact with graphene
TLDR
Atomistic simulations reproduce the experimental observations of layer-dependent friction and transient frictional strengthening on graphene and reveal that the evolution of static friction is a manifestation of the natural tendency for thinner and less-constrained graphene to re-adjust its configuration as a direct consequence of its greater flexibility.
Frictional Characteristics of Atomically Thin Sheets
TLDR
Using friction force microscopy, the nanoscale frictional characteristics of atomically thin sheets of graphene, molybdenum disulfide, niobium diselenide, and hexagonal boron nitride are compared to those of their bulk counterparts, suggesting that the trend arises from the thinner sheets’ increased susceptibility to out-of-plane elastic deformation.
Frictional Properties of Nanojunctions Including Atomically Thin Sheets.
TLDR
It is demonstrated that in order to achieve a superlow friction, the graphene sheet should be grown on or transferred to the surface with morphology, which is close to that of the graphene, while the second confining surface should be incommensurate with the graphene.
Substrate effect on thickness-dependent friction on graphene
Using friction force microscopy, we have investigated the frictional behavior of graphene deposited on various substrates as well as over micro-fabricated wells. Both graphene on SiO 2 / Si
Dependence of the friction strengthening of graphene on velocity.
Graphene shows great potential applications as a solid lubricant in micro- and nanoelectromechanical systems (MEMS/NEMS). An atomic-scale friction strengthening effect in a few initial atomic
Enhanced nanoscale friction on fluorinated graphene.
TLDR
It is proposed that damping via flexural phonons could be a main source for frictional energy dissipation in 2D systems such as graphene.
Robust ultra-low-friction state of graphene via moiré superlattice confinement
TLDR
By proper alignment of graphene on a Ge(111) substrate, friction of graphene could be well preserved at an ultra-low level even after fluorination or oxidation, which is experimentally found to be closely related to the suppression of molecular-level deformation of graphene within the moiré superlattice structure.
Nanoscale interfacial friction and adhesion on supported versus suspended monolayer and multilayer graphene.
TLDR
It is shown that tip-sample adhesive forces depend on interactions with subsurface material and increase in the presence of a supporting substrate or additional graphene layers, and friction on supported monolayer graphene can be fit using generalized continuum mechanics models.
Suppressing Nanoscale Wear by Graphene/Graphene Interfacial Contact Architecture: A Molecular Dynamics Study.
TLDR
This investigation reveals a strategy for reducing nanowear by suppressing the local contact pressure fluctuations via graphene/graphene sliding interface architecture, which provides a theoretical guidance for designing wear-resistant coatings for the longevity of AFM probes and MEMS/NEMS systems.
Thermolubricity in atomic-scale friction
In this paper, we use a set of rate equations to describe the thermal activation of a tip moving along a one-dimensional lattice, including the possibility of multiple back and forth jumps between
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