Stiffness-dependent interlayer friction of graphene

Zhang, Hongwei; Guo, Zhengrong; Gao, Hong; Chang, Tienchong

doi:10.1016/j.carbon.2015.06.024

Cited by 114 publications

(61 citation statements)

References 51 publications

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“…They found that the depth of the indentation can indicate the friction of the soft substrate by the relationship between friction and substrate deformation. Furthermore, the stiffness-dependent friction has a close relationship with stiffness-dependent deformation of graphene [38]. With a softer substrate and a larger deformation, the friction energy will be larger.…”

Section: Frictionmentioning

confidence: 98%

“…Zhang et al acquired the friction behavior of a graphene flake sliding on a supported graphene substrate by making use of a graphene-spring model, as well as verify that friction increases exponentially with decreasing stiffness [38]. They found that the depth of the indentation can indicate the friction of the soft substrate by the relationship between friction and substrate deformation.…”

Section: Frictionmentioning

confidence: 99%

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A Review of Current Development of Graphene Mechanics

et al. 2018

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Graphene, a two-dimensional carbon in honeycomb crystal with single-atom thickness, possesses extraordinary properties and fascinating applications. Graphene mechanics is very important, as it relates to the integrity and various nanomechanical behaviors including flexing, moving, rotating, vibrating, and even twisting of graphene. The relationship between the strain and stress plays an essential role in graphene mechanics. Strain can dramatically influence the electronic and optical properties, and could be utilized to engineering those properties. Furthermore, graphene with specific kinds of defects exhibit mechanical enhancements and thus the electronic enhancements. In this short review, we focus on the current development of graphene mechanics, including tension and compression, fracture, shearing, bending, friction, and dynamics properties of graphene from both experiments and numerical simulations. We also touch graphene derivatives, including graphane, graphone, graphyne, fluorographene, and graphene oxide, which carve some fancy mechanical properties out from graphene. Our review summarizes the current achievements of graphene mechanics, and then shows the future prospects.

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Section: Frictionmentioning

confidence: 98%

Section: Frictionmentioning

confidence: 99%

A Review of Current Development of Graphene Mechanics

et al. 2018

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“…The potential includes shortrange interactions, long range vdW interactions and dihedral terms, which has been shown to well represent the binding energy and elastic properties of carbon materials. The vdW interactions were described by the Lennard-Jones term, which has been reported to reasonably capture the vdW in multi-layer graphene [55], multi-wall carbon nanotubes [56], and carbon nanotube bundles [57]. The cut-off distance of the AIREBO potential was chosen as 2.0 Å [58][59][60][61][62][63].…”

Section: Methodsmentioning

confidence: 99%

A novel super-elastic carbon nanofiber with cup-stacked carbon nanocones and a screw dislocation

Han

Duan

et al. 2019

Carbon

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Carbon nanofibers (NFs) have been envisioned with broad promising applications, such as nanoscale actuators and energy storage medium. This work reports for the first-time superelastic tensile characteristics of NFs constructed from a screw dislocation of carbon nanocones (NF-S). The NF-S exhibits three distinct elastic deformation stages under tensile, including an initial homogeneous deformation, delamination, and further stretch of covalent bonds. The delamination process endows the NF-S extraordinary tensile deformation capability, which is not accessible from its counterpart with a normal cup-stacked geometry. The failure of NF-S is governed by the inner edges of the nanocone due to the strain concentration, leading to a common failure force for NF-S with varying geometrical parameters. Strikingly, the delamination process is dominated by the inner radius and the apex angle of the nanocone. For a fixed apex angle, the yielding strain increases remarkably when the inner radius increases, which can exceed 1000%. It is also found that the screw dislocation allows the nanocones flattening and sliding during compression. This study provides a comprehensive understanding on the mechanical properties of NFs as constructed from carbon nanocones, which opens new avenues for novel applications, such as nanoscale actuators. (Haifei Zhan) 1 = ( /2) and 1 = ( /2), respectively. Considering the close packing morphology, i.e., the distance between each layer equals to the graphite distance (b = 3.35 Å), the effective height or length of the nanofiber can be approximated as ℎ 1 = ( − 1) /sin ( 2 ⁄ ). Thus, the cross-section and volume of the nanofiber can be approximated as 1 = ( = − = ) sin( 2 ⁄ ) = , and 1 = ( − 1)( = − = )sin ( 2 ⁄ ).

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“…A good design for the materials with 3D nanostructures is becoming increasingly important given the need for advanced functional applications in biomedical engineering, water transport, energy conversion and storage, molecular separation, sensors, and nanoreactors, in which an efficient friction reduction is critical for operational stability and reliability . This section focuses on the examples of 3D nanomaterials with well‐controlled architectures and their resultant superlubricity.…”

Section: D Nanomaterialsmentioning

confidence: 99%

Nanomaterials in Superlubricity

Zhai

Zhou

2019

Adv Funct Materials

205

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The vanishing friction, known as superlubricity, is potentially a significant performance indicator in the development of nanostructured materials and has become increasingly important for realizing energy saving and extending the life of mechanical components. Herein, a systematic review of recent progress in nanomaterials for achieving the superlubric state is provided, beginning with a brief introduction of nanostructured materials in superlubricity and its wide potential applications. Subsequently, a detailed discussion of experimental and simulation works on the different spatial structures of nanomaterials associated with size effects ranging from 0D to 3D nanostructures is given, with an emphasis on solid and liquid superlubricity. Finally, this work concludes with perspectives on the challenges and future directions for developing nanomaterials in the field of superlubricity.

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Stiffness-dependent interlayer friction of graphene

Cited by 114 publications

References 51 publications

A Review of Current Development of Graphene Mechanics

A Review of Current Development of Graphene Mechanics

A novel super-elastic carbon nanofiber with cup-stacked carbon nanocones and a screw dislocation

Nanomaterials in Superlubricity

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