Atomic-scale friction in graphene oxide: An interfacial interaction perspective from first-principles calculations

Wang, Linfeng; Ma, Tianbao; Hu, Yuanzhong; Wang, Hui

doi:10.1103/physrevb.86.125436

Cited by 94 publications

(88 citation statements)

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“…The enhanced friction also holds for graphene-oxide nanoribbons, whose friction can be further increased by exposing it to high humidity [68]. By using density functional theory, Wang et al investigated the atomic-scale friction in graphene oxide, revealing the atomic origination of the enhanced friction [69]. In addition, an adhesion-dependent negative friction coefficient was found by Deng et al on oxygen-modified graphite, as shown in Fig.…”

Section: Figmentioning

confidence: 95%

Friction of low-dimensional nanomaterial systems

et al. 2014

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When material dimensions are reduced to the nanoscale, exceptional physical mechanics properties can be obtained that differ significantly from the corresponding bulk materials. Here we review the physical mechanics of the friction of low-dimensional nanomaterials, including zero-dimensional nanoparticles, onedimensional multiwalled nanotubes and nanowires, and two-dimensional nanomaterials-such as graphene, hexagonal boron nitride (h-BN), and transition-metal dichalcogenides-as well as topological insulators. Nanoparticles between solid surfaces can serve as rolling and sliding lubrication, while the interlayer friction of multiwalled nanotubes can be ultralow or significantly high and sensitive to interwall spacing and chirality matching, as well as the tube materials. The interwall friction can be several orders of magnitude higher in binary polarized h-BN tubes than in carbon nanotubes mainly because of wall buckling. Furthermore, current extensive studies on two-dimensional nanomaterials are comprehensively reviewed herein. In contrast to their bulk materials that serve as traditional dry lubricants (e.g., graphite, bulk h-BN, and MoS 2 ), large-area highquality monolayered two-dimensional nanomaterials can serve as single-atom-thick coatings that minimize friction and wear. In addition, by appropriately tuning the surface properties, these materials have shown great promise for creating energy-efficient self-powered electro-opto-magneto-mechanical nanosystems. State-of-theart experimental and theoretical methods to characterize friction in nanomaterials are also introduced.

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Section: Figmentioning

confidence: 95%

Friction of low-dimensional nanomaterial systems

et al. 2014

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“…For example, a large lateral force is dominated by an interlayer hydrogen-bonded epoxy-hydroxyl coupling in GO/rGO. This leads to dissipation of frictional energy, manifested by higher adhesion and high strength of sliding resistance17. It should be noted that epoxy-epoxy and hydroxyl-hydroxyl interactions are weaker than epoxy-hydroxyl ones.…”

mentioning

confidence: 99%

Role of oxygen functional groups in reduced graphene oxide for lubrication

Gupta

Kumar

Panda

et al. 2017

Sci Rep

473

195

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Functionalized and fully characterized graphene-based lubricant additives are potential 2D materials for energy-efficient tribological applications in machine elements, especially at macroscopic contacts. Two different reduced graphene oxide (rGO) derivatives, terminated by hydroxyl and epoxy-hydroxyl groups, were prepared and blended with two different molecular weights of polyethylene glycol (PEG) for tribological investigation. Epoxy-hydroxyl-terminated rGO dispersed in PEG showed significantly smaller values of the friction coefficient. In this condition, PEG chains intercalate between the functionalized graphene sheets, and shear can take place between the PEG and rGO sheets. However, the friction coefficient was unaffected when hydroxyl-terminated rGO was coupled with PEG. This can be explained by the strong coupling between graphene sheets through hydroxyl units, causing the interaction of PEG with the rGO to be non- effective for lubrication. On the other hand, antiwear properties of hydroxyl-terminated rGO were significantly enhanced compared to epoxy-hydroxyl functionalized rGO due to the integrity of graphene sheet clusters.

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“…Ma et al [109] investigated atomic-scale friction in graphene oxide using density functional theory calculation including a long-range dispersion correction (DFT-D). The sliding behaviors between two graphene oxide layers with different functional groups or oxidation levels were quantitatively studied based on the constructed potential energy surfaces.…”

Section: Graphenementioning

confidence: 99%