Contrast in nanoscale friction between rotational domains of graphene on Pt(111)

Chan, Nicholas; Balakrishna, S. G.; Klemenz, Andreas; Moseler, Michael; Egberts, Philip; Bennewitz, Roland

doi:10.1016/j.carbon.2016.11.016

Cited by 37 publications

(15 citation statements)

References 32 publications

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“…The values of the strain energy are quite high for Al, Ag, Au, Pd, and Pt in the (1 × 1) cell (or 0° Moiré pattern), where there is a large lattice mismatch. However, these aligned orientations are still considered as they facilitate graphene chemisorption and are seen experimentally for Au, Pd, and Pt, where graphene distorts over large length scales to reduce the lattice strain. ,− …”

Section: Methodsmentioning

confidence: 99%

Effect of a Metal Substrate on Interlayer Interactions in Bilayer Graphene

Christian

Johnson

2018

J. Phys. Chem. C

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Bilayer graphene (BLG) has been shown to have advantageous electronic and physical properties relative to single-layer graphene and is a model system for probing the tribology of graphene-based lubricants. However, few studies have investigated how metal substrates affect interlayer interactions, as quantified by the exfoliation energy and the sliding barrier of the upper graphene layer. In this work, we present a study of adsorbed BLG on several transition-metal surfaces using density-functional theory incorporating the exchange-hole dipole moment dispersion model. Our results show that physisorption of BLG on a surface does not significantly perturb the interlayer interactions, exfoliation, or sliding. Conversely, chemisorption of BLG increases the exfoliation energy and decreases the sliding barriers because of stronger dispersion contributions from the metal substrate. Changes in translational and rotational orientations massively impact the sliding friction for Ni group metals that can facilitate both chemisorption and physisorption.

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Section: Methodsmentioning

confidence: 99%

Effect of a Metal Substrate on Interlayer Interactions in Bilayer Graphene

Christian

Johnson

2018

J. Phys. Chem. C

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“…The atoms with positive stress (red) provide adhesive force to indentation, whereas those with negative stress (blue) hinder tip penetration. Here we need to point out that the periodic stress distribution out of the contact area manifests the impacts of moiré pattern formed between graphene and supporting crystalline substrate [45,46].…”

Section: Size Effect On Nanoscale Adhesive Contactmentioning

confidence: 99%

Tuning nanoscale adhesive contact behavior to a near ideal Hertzian state via graphene coverage

Chen

Guan²,

Yang³

et al. 2021

Computational Materials Science

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“…Modifying a polymer material by improving its self-lubricating properties is an effective method to reduce the friction forces and their fluctuation amplitudes [17]. Many scholars have used nanoparticles to enhance the self-lubricating properties of polymers [18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Reinforcement of Frictional Vibration Noise Reduction Properties of a Polymer Material by PTFE Particles

Dong

2022

Materials

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The insufficient lubrication of the contact interface between moving parts can easily induce severe friction vibration and noise under extreme working conditions, which will threaten the service life and reliability of polymer moving components, including water-lubricated stern tube polymer bearings. Thermoplastic polyurethane (TPU) modified by polytetrafluoroethylene (PTFE) particles was developed. The effects of PTFE on the wear and vibration behaviors of modified TPU sliding against the ZCuSn10Zn2 ring-plates were investigated. The coefficients of friction (COFs), wear mass losses, wear morphologies, frictional vibration, and noise were analyzed synthetically. The results showed that a suitable mass content of PTFE reduced the COFs and wear mass losses of the TPU composites by more than 50% and 40%, respectively, while presenting an excellent friction reduction. The lower COFs of modified TPU showed a small fluctuation amplitude and eliminated vibration waveforms at high vibrational frequencies, which was useful for reducing frictional vibration and noise. The knowledge gained in this study is useful for a better understanding of the wear behaviors of polymer composites, as well as for the design a new polymer material with good self-lubricating and frictional vibration and noise reduction properties.

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Contrast in nanoscale friction between rotational domains of graphene on Pt(111)

Cited by 37 publications

References 32 publications

Effect of a Metal Substrate on Interlayer Interactions in Bilayer Graphene

Effect of a Metal Substrate on Interlayer Interactions in Bilayer Graphene

Tuning nanoscale adhesive contact behavior to a near ideal Hertzian state via graphene coverage

Reinforcement of Frictional Vibration Noise Reduction Properties of a Polymer Material by PTFE Particles

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