Bending stiffness and interlayer shear modulus of few-layer graphene

Chen, Xiaoming; Yi, Chenglin; Ke, Changhong

doi:10.1063/1.4915075

Cited by 114 publications

(95 citation statements)

References 33 publications

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“…Similar shear stresses have been experimentally obtained for multi-walled carbon nanotubes (MWCNTs) and graphite, demonstrating the ultralow interlayer shear interactions dominated by vdW forces [54]. Some modeling works and bending experiments have reported considerably high shear stress between graphene layers (∼0.1 GPa) due to the commensurability-dependent stick-slip friction with periodically changing peak shear stress [55,56]. Instead, the relatively lower values here can be attributed to the averaged effect caused by the limited spatial resolution of the Raman laser spot (∼1 μm).…”

Section: Prl 119 036101 (2017) P H Y S I C a L R E V I E W L E T T Esupporting

confidence: 50%

Measuring Interlayer Shear Stress in Bilayer Graphene

et al. 2017

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Monolayer two-dimensional (2D) crystals exhibit a host of intriguing properties, but the most exciting applications may come from stacking them into multilayer structures. Interlayer and interfacial shear interactions could play a crucial role in the performance and reliability of these applications, but little is known about the key parameters controlling shear deformation across the layers and interfaces between 2D materials. Herein, we report the first measurement of the interlayer shear stress of bilayer graphene based on pressurized microscale bubble loading devices. We demonstrate continuous growth of an interlayer shear zone outside the bubble edge and extract an interlayer shear stress of 40 kPa based on a membrane analysis for bilayer graphene bubbles. Meanwhile, a much higher interfacial shear stress of 1.64 MPa was determined for monolayer graphene on a silicon oxide substrate. Our results not only provide insights into the interfacial shear responses of the thinnest structures possible, but also establish an experimental method for characterizing the fundamental interlayer shear properties of the emerging 2D materials for potential applications in multilayer systems.

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Section: Prl 119 036101 (2017) P H Y S I C a L R E V I E W L E T T Esupporting

confidence: 50%

Measuring Interlayer Shear Stress in Bilayer Graphene

et al. 2017

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“…For four layer, the small difference between AA'B'B or AA' and AA'B'C' or ABCD is merely a result of different lattice sizes in consideration of the fact that the values of energy per atom after energy minimization for the four morphologies are nearly the same. With the participation of interlayer covalent bond which impedes shear between layers during bending process, bending modulus of silicene is expected to be more sensitive to the number of layers than graphene in actual experiment 32 . Table 1 Bending modulus (ev) of multilayer silicene with varying number of layers and stacking mode.…”

Section: Part Ii: Bending Modulus and Tensile Test Of Multilayer Silimentioning

confidence: 99%

Multilayer silicene: Structure, electronics, and mechanical property

Chen

2020

Computational Materials Science

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Herein, we performed first principle calculation and classical molecular dynamics simulation to study structural optimization, band structure, and mechanical properties of differently stacked multilayer silicene. Several local energy minima have been identified as metastable conformation with different stacking mode and layer number. Bandstructure of low buckled AA bilayer silicene optimized with SCAN+rvv10 presents semiconducting behavior with a bandgap of 0.4419ev. Young's modulus of multilayer silicene shows low dependency on layer number or stacking mode. Whereas, fracture stress and strain is sensitive to the number of layers, specific stacking mode, and chirality. Furthermore, bending modulus of multilayer silicene (e.g., 0.44ev for monolayer silicene) is even lower than that of graphene, which may attribute to the flexibility of bond angle. Figure. 1 Top and side view of three 3 × 3 basic stacking mode: (a) AA; (b) AA'; (c) AB. Atoms with larger radius correspond to bottom layer. Different colours denote atoms in different buckling directions.

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“…The bending of multilayer graphene stacks have been investigated both experimentally 6,7 and theoretically 3,[8][9][10] . However, these studies have mostly focused on the interlayer shear modulus 3,6 and bending modulus 7,8 of multilayer graphene stacks.…”

Section: Introductionmentioning

confidence: 99%

“…However, these studies have mostly focused on the interlayer shear modulus 3,6 and bending modulus 7,8 of multilayer graphene stacks. Thus, surprisingly little effort has been invested on investigating the detailed mechanical behavior of sliding stacks and the registry changes under bending.…”

Section: Introductionmentioning

confidence: 99%

Peeling of multilayer graphene creates complex interlayer sliding patterns

Korhonen¹,

Koskinen²

2015

Phys. Rev. B

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Peeling, shearing, and sliding are important mechanical phenomena in van der Waals solids. However, theoretically they have been studied mostly using minimal periodic cells and in the context of accurate quantum simulations. Here, we investigate the peeling of large-scale multilayer graphene stacks with varying thicknesses, stackings, and peeling directions by using classical molecular dynamics simulations with a registry-dependent interlayer potential. Simulations show that, while at large scale the peeling proceeds smoothly, at small scale the registry shifts and sliding patterns of the layers are unexpectedly intricate and depend both on the initial stacking and on the peeling direction. These observations indicate that peeling and concomitant kink formations may well transform stacking order and thereby profoundly influence the electronic structures of such multilayer solids.

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Bending stiffness and interlayer shear modulus of few-layer graphene

Abstract: Articles you may be interested inSandwich beam model for free vibration analysis of bilayer graphene nanoribbons with interlayer shear effect

Cited by 114 publications

References 33 publications

Measuring Interlayer Shear Stress in Bilayer Graphene

Measuring Interlayer Shear Stress in Bilayer Graphene

Multilayer silicene: Structure, electronics, and mechanical property

Peeling of multilayer graphene creates complex interlayer sliding patterns

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