Material transfer mechanism for fabrication of superlubricity interface by reciprocating rubbing on graphite under high contact stress

Yu, Kang Yang Trevor; Peng, Yitian; Lang, Haojie; Ding, Shuyang; Huang, Yao

doi:10.1016/j.carbon.2021.12.041

Cited by 13 publications

(10 citation statements)

References 57 publications

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“…The instantaneous lateral friction trace was simply evaluated by considering the time-dependent elongation of the pulling spring: ■ RESULTS AND DISCUSSION TL Formation from Nanoscale Force Spectroscopy. According to previous studies, 10,17,21 the "ultralow-friction" interface results from tribo-induced material transfer from the graphitic substrate to the sliding countersurface. We enabled material transfer by driving colloidal probes over HOPG with the sliding direction perpendicular to the local orientation of the surface steps (scan areas from 1 × 1 μm 2 to 8 × 8 μm 2 , velocity ∼1−50 μm/s).…”

Section: ■ Introductionsupporting

confidence: 54%

“…We enabled material transfer by driving colloidal probes over HOPG with the sliding direction perpendicular to the local orientation of the surface steps (scan areas from 1 × 1 μm 2 to 8 × 8 μm 2 , velocity ∼1–50 μm/s). This choice in fact aids material transfer from HOPG to the AFM probe . As resumed in Figure , the process of TL formation showed qualitatively similar features for all beads.…”

Section: Resultsmentioning

confidence: 87%

“…This choice in fact aids material transfer from HOPG to the AFM probe. 21 As resumed in Figure 2, the process of TL formation showed qualitatively similar features for all beads. Figure 2a reports the evolution of the friction force for each probe, displayed over an arbitrary sliding distance of ∼2.5 × 10 4 μm.…”

Section: ■ Introductionmentioning

confidence: 95%

“…In this paper, we go beyond the case of an ideally smooth silica microparticle ,, by considering a representative set of nominally rigid colloidal probes having different curvature radius ( R ∼ 2–25 μm) and pristine surface roughness (σ ∼ 0.5–15 nm). We complement conventional AFM force spectroscopy with knowledge derived from the TL morphology and atomic-scale friction force spectroscopy.…”

Section: Introductionmentioning

confidence: 99%

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Sliding Friction and Superlubricity of Colloidal AFM Probes Coated by Tribo-Induced Graphitic Transfer Layers

et al. 2022

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Colloidal probe atomic force microscopy (AFM) allows us to explore sliding friction phenomena in graphite contacts of nominal lateral size up to hundreds of nanometers. It is known that contact formation involves tribo-induced material transfer of graphite flakes from the graphitic substrate to the colloidal probe. In this context, sliding states with nearly vanishing friction, i.e., superlubricity, may set in. A comprehensive investigation of the transfer layer properties is mandatory to ascertain the origin of superlubricity. Here we explore the friction response of micrometric beads, of different size and pristine surface roughness, sliding on graphite under ambient conditions. We show that such tribosystems undergo a robust transition toward a low-adhesion, low-friction state dominated by mechanical interactions at one dominant triboinduced nanocontact. Friction force spectroscopy reveals that the nanocontact can be superlubric or dissipative, in fact undergoing a load-driven transition from dissipative stick−slip to continuous superlubric sliding. This behavior is excellently described by the thermally activated, single-asperity Prandtl−Tomlinson model. Our results indicate that upon formation of the transfer layer, friction depends on the energy landscape experienced by the topographically highest tribo-induced nanoasperity. We consistently find larger dissipation when the tribo-induced nanoasperity is slid against surfaces with higher atomic corrugation than graphite, like MoS 2 and WS 2 , in prototypical van der Waals layered heterojunctions.

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Section: ■ Introductionsupporting

confidence: 54%

Section: Resultsmentioning

confidence: 87%

Section: ■ Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

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Sliding Friction and Superlubricity of Colloidal AFM Probes Coated by Tribo-Induced Graphitic Transfer Layers

et al. 2022

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“…Graphene, a two-dimensional material consisting of sp 2 -hybridized carbon atoms, possesses outstanding mechanical and tribological properties. A cover of graphene on a metal or silicon substrate could significantly decrease the friction and improve the wear-resistance properties. , Ultralow friction and even superlubricity could be achieved when the graphene on both sides of the moving parts is in incommensurate contact. − These properties make graphene an ideal component and solid lubricant coating in MEMS/NEMS. The friction of graphene is greatly affected by the substrate because of its atomic thickness.…”

mentioning

confidence: 99%

Role of Interfacial Water in the Tribological Behavior of Graphene in an Electric Field

et al. 2022

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Friction properties in the electric field are important for the application of graphene as a solid lubricant in graphene-based micro/nanoelectromechanical systems. The studies based on conductive atomic force microscopy show that interfacial water between graphene and the SiO2/Si substrate affects the friction of graphene in the electric field. Friction without applying voltage remains low because the interfacial water retains a stable ice-like network. However, friction after applying voltage increases because the polar water molecules are attracted by the electric field and gather around the tip. The gathered interfacial water not only increases the deformation of graphene but is also pushed by the tip during frictional sliding, which results in the increased friction. These studies provide beneficial guidelines for the applications of graphene as a solid lubricant in the electric field.

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The Transition of Friction Coefficient on Graphene by the Microsphere Probe

et al. 2023

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Material transfer mechanism for fabrication of superlubricity interface by reciprocating rubbing on graphite under high contact stress

Cited by 13 publications

References 57 publications

Sliding Friction and Superlubricity of Colloidal AFM Probes Coated by Tribo-Induced Graphitic Transfer Layers

Sliding Friction and Superlubricity of Colloidal AFM Probes Coated by Tribo-Induced Graphitic Transfer Layers

Role of Interfacial Water in the Tribological Behavior of Graphene in an Electric Field

The Transition of Friction Coefficient on Graphene by the Microsphere Probe

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