Slippage in stacking of graphene nanofragments induced by spin polarization

Lei, Yanyu; Jiang, Wanrun; Dai, Xing; Song, Ruixia; Wang, Jianpeng; Gao, Yang

doi:10.1038/srep10985

Cited by 12 publications

(3 citation statements)

References 26 publications

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“…During unloading, the whole system will return to the initial minimum energy state. Possibility of this type of mechanically activated slippage in bilayer graphene was suggested by first-principles calculations. , Additional first-principles calculations investigated the stacking configuration change due to the presence of electric field, spin polarization, and quantum confinement effects. − To our best knowledge, our study is the first report on the recoverable interlayer slippage observed in experiments and MD simulations.…”

Section: Results and Discussionmentioning

confidence: 73%

Recoverable Slippage Mechanism in Multilayer Graphene Leads to Repeatable Energy Dissipation

et al. 2016

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Understanding the deformation mechanisms in multilayer graphene (MLG), an attractive material used in nanodevices as well as in the reinforcement of nanocomposites, is critical yet challenging due to difficulties in experimental characterization and the spatiotemporal limitations of atomistic modeling. In this study, we combine nanomechanical experiments with coarse-grained molecular dynamics (CG-MD) simulations to elucidate the mechanisms of deformation and failure of MLG sheets. Elastic properties of graphene sheets with one to three layers are measured using film deflection tests. A nonlinear behavior in the force vs deflection curves for MLGs is observed in both experiments and simulations: during loading/unloading cycles, MLGs dissipate energy through a "recoverable slippage" mechanism. The CG-MD simulations further reveal an atomic level interlayer slippage process and suggest that the dissipated energy scales with film perimeter. Moreover, our study demonstrates that the finite shear strength between individual layers could explain the experimentally measured size-dependent strength with thickness scaling in MLG sheets.

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Section: Results and Discussionmentioning

confidence: 73%

Recoverable Slippage Mechanism in Multilayer Graphene Leads to Repeatable Energy Dissipation

et al. 2016

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“…As the applied AFM indentation forces were larger than %3000 nN, the elastic stiffness of our double-layer graphene ribbons softened. Possible reasons for the softening of the elastic stiffness include large AFM indentation force-induced interlayer sliding between graphene layers, [35][36][37][38] larger AFM indentation force-induced geometrical dislocation and distortion of graphene ribbons, delamination of graphene ribbons away from the SiO 2 surface of the Si mass or the trench edges, and crack formations in the graphene ribbons.…”

Section: Discussionmentioning

confidence: 99%

Deformation Behavior and Mechanical Properties of Suspended Double‐Layer Graphene Ribbons Induced by Large Atomic Force Microscopy Indentation Forces

Fan

Niklaus

2022

Adv Eng Mater

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Atomic force microscopy (AFM) indentation experiments are commonly used to study the mechanical properties of graphene, such as Young's modulus and strength. However, applied AFM indentation forces on suspended graphene beams or ribbons are typically limited to several tens of nanonewtons due to the extreme thinness of graphene and their sensitivity to damage caused by the AFM tip indentation. Herein, graphene ribbons with a Si mass attached to their center position are employed, allowing us to introduce an unprecedented, wide range of AFM indentation forces (0–6800 nN) to graphene ribbons before the graphene ribbons are ruptured. It is found that the Young's modulus of double‐layer graphene ribbons decreases as the applied AFM indentation force is larger than ≈3000 nN, which indicates that the stiffness of double‐layer graphene ribbons remains constant before exposing them to AFM indentation forces larger than ≈3000 nN.

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“…In addition to the high-symmetry stackings, the low-symmetry ones deserve systematic researches [262][263][264][265][266][267][268][269][270][271][272][273][274][275]. A sliding bilayer graphene (BLG), with various misalignment configurations, is chosen for the detailed discussions about the specific essential properties.…”

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confidence: 99%

Optical Properties of Graphene in Magnetic and Electric Fields

Lin

Huang

et al. 2017

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Optical properties of graphene are explored by using the generalized tight-binding model. The main features of spectral structures, the form, frequency, number and intensity, are greatly enriched by the complex relationship among the interlayer atomic interactions, the magnetic quantization and the Coulomb potential energy. Absorption spectra have shoulders, asymmetric peaks and logarithmic peaks, coming from the band-edge states of parabolic dispersions, the constant-energy loops and the saddle points, respectively. The initial forbidden excitation region is only revealed in even-layer AA stacking systems. Optical gaps and special structures can be generated by an electric field. The delta-function-like structures in magneto-optical spectra, which present the single, twin and double peaks, are associated with the symmetric, asymmetric and splitting Landau-level energy spectra, respectively. The single peaks due to the non-tilted Dirac cones exhibit the nearly uniform intensity. The AAB stacking possesses more absorption structures, compared to the other stackings. The diverse magneto-optical selection rules are mainly determined by the well-behaved, perturbed and undefined Landau modes. The frequent anti-crossings in the magneticand electric-field-dependent energy spectra lead to the increase of absorption peaks and the reduced intensities. Part of theoretical calculations are consistent with the 1 arXiv:1603.02797v2 [physics.comp-ph] 19 Jul 2016 experimental measurements, and the others need further detailed examinations.Graphene is a 2D material made up of hexagonal carbon lattices [1,2]. Since mono-and few-layer graphene sheets were first fabricated in 2004 [1,2], low-dimensional graphenerelated systems have been a great interest to experimental and theoretical studies. The stacking orders of graphene sheets include the essential sequences of AA [3,4], AB [5-9], ABC [5,[8][9][10][11] stackings. While the AA stacking configuration has only been artificially made from intercalated graphite compounds, the AB and ABC configurations are the common orders in natural graphite, respectively, with their estimated volume fractions: 80 % and 14 % [15,16]. The rest parts ∼ 6% consist of haphazardly stacked graphene sheets, called turbostratic configuration [17][18][19]. Few-layer graphene desired with a specific stacking configuration can be exfoliated from highly orientated pyrolytic graphite [1,2], and chemically and electrochemically reduced from graphene oxide [20][21][22][23][24][25][26][27]. Nevertheless, chemical vapor deposition method has the advantage of producing large-scale size of highquality graphene sheets. Recently, large area of graphene with high mobility and highly symmetric configurations, e.g., AA, AB and ABC, have been found in CVD-grown samples [28][29][30][31][32][33][34][35][36][37][38][39][40]. The improved quality is adequate for research experiments and industry applications [41][42][43][44][45][46][47][48][49][50]. In addition, the AAB stacking and intermediate bilayer configurations, with r...

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Slippage in stacking of graphene nanofragments induced by spin polarization

Cited by 12 publications

References 26 publications

Recoverable Slippage Mechanism in Multilayer Graphene Leads to Repeatable Energy Dissipation

Recoverable Slippage Mechanism in Multilayer Graphene Leads to Repeatable Energy Dissipation

Deformation Behavior and Mechanical Properties of Suspended Double‐Layer Graphene Ribbons Induced by Large Atomic Force Microscopy Indentation Forces

Optical Properties of Graphene in Magnetic and Electric Fields

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