Hysteresis and its impact on characterization of mechanical properties of suspended monolayer molybdenum-disulfide sheets

Pang, Haosheng; Huang, Peng; Zhuo, Weirong; Li, Minglin; Gao, Chen; Guo, Dan

doi:10.1039/c8cp07158f

Cited by 7 publications

(6 citation statements)

References 47 publications

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“…In theory, it can be caused by frictional behavior and plastic behavior, including the tip‐membrane friction, the membrane‐substrate friction, and the plastic deformation of the membrane. [ 17 ] Besides, the possibility of the large deformation of the tip should also be considered. Nevertheless, finite element simulations (shown in Figure S5, Supporting Information) demonstrated that only the elastic deformation would occur in the tip, excluding the influence of the deformation of the tip on the experimental results.…”

Section: Resultsmentioning

confidence: 99%

“…Since stretching under out‐of‐plane displacement dominates the membrane deformation of these devices, AFM nanoindentation is more suitable for its accessibility to the investigation of the relationship between interlayer interaction and the mechanical properties under large out‐of‐plane deformation. Nevertheless, friction at the interface between the AFM tip and the membrane (called tip friction hereinafter for brevity) can induce the curve hysteresis during AFM nanoindentations [ 17 ] and further affect the effectiveness of the experimental results. [ 18,19 ] Besides, the characterization of the tip radius directly influences the measured fracture strength.…”

Section: Introductionmentioning

confidence: 99%

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Reduced Fracture Strength of 2D Materials Induced by Interlayer Friction

Zhan

Tan

Xie

2021

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The potential applications of 2D layered materials (2DLMs) as the functional membranes in flexible electronics and nano‐electromechanical systems emphasize the role of the mechanical properties of these materials. Interlayer interactions play critical roles in affecting the mechanical properties of 2DLMs, and nevertheless the understanding of their relationship remains incomplete. In the present work, it is reported that the fracture strength of few‐layer (FL) WS2 can be weakened by the interlayer friction among individual layers with the assistance of finite element simulations and density functional theory (DFT) calculations. The reduced fracture strength can be also observed in FL WSe2 but with a lesser extent, which is attributed to the difference in the interlayer sliding energies of WS2 and WSe2 as confirmed by DFT calculations. Moreover, the tip‐membrane friction can give rise to the underestimation of the Young's modulus except for the membrane nonlinearity. These results give deep insights into the influence of interfacial interactions on the mechanical properties of 2DLMs, and suggest that importance should be also attached to the interlayer interactions during the design of nanodevices with 2DLMs as the functional materials.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reduced Fracture Strength of 2D Materials Induced by Interlayer Friction

Zhan

Tan

Xie

2021

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“…Nucleation and motion of domain walls separating such domains produces considerable dissipation of elastic strain energy, and the loading-unloading stress-strain curves demonstrate hysteresis loop [64]. Cyclic loading of suspended MoS 2 sheets during the nanoindentation experiments has also revealed the hysteresis behavior [65]. Damping properties of the compressed vertically aligned CNT brushes have been analyzed in [26].…”

Section: Introductionmentioning

confidence: 99%

Elastic Damper Based on the Carbon Nanotube Bundle

Rysaeva¹,

Korznikova²,

Мурзаев³

et al. 2020

FU Mech Eng

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Mechanical response of the carbon nanotube bundle to uniaxial and biaxial lateral compression followed by unloading is modeled under plane strain conditions. The chain model with a reduced number of degrees of freedom is employed with high efficiency. During loading, two critical values of strain are detected. Firstly, period doubling is observed as a result of the second order phase transition, and at higher compressive strain, the first order phase transition takes place when carbon nanotubes start to collapse. The loading-unloading stress-strain curves exhibit a hysteresis loop and, upon unloading, the structure returns to its initial form with no residual strain. This behavior of the nanotube bundle can be employed for the design of an elastic damper.

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“…This direction of application of an external force is most likely under real conditions since most of the fabricated nanoribbons are grown at the substrate, which is parallel to its layers. ,, Taking into account the low thickness of the layer and the fact that it is partially adhered to the substrate, we only act with force in the direction parallel to its layers. Most of the experiments ,− were carried out focusing only on examining such vertical forces. According to our simulations, the first three vibrational eigenmodes of the PNR have the following polarizations: mode 1 is horizontal, mode 2 is vertical, and mode 3 is horizontal.…”

Section: Resultsmentioning

confidence: 99%

“…In summary, there are multiple possible approaches for simulating the mechanical behavior of nanostructures: ab initio DFT approach, force-field molecular dynamics, , FEM, or analytical solution of continuum models . Each of them has its own unique advantages, but the key factors are computational complexity and versatility in terms of nanomaterials.…”

Section: Resultsmentioning

confidence: 99%

Atomic-Scale Finite-Element Modeling of Elastic Mechanical Anisotropy in Finite-Sized Strained Phosphorene Nanoribbons

Pyrchla

Bogdanowicz

2022

J. Phys. Chem. C

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Nanoribbons are crucial nanostructures due to their superior mechanical and electrical properties. This paper is devoted to hybrid studies of the elastic mechanical anisotropy of phosphorene nanoribbons whose edges connect the terminals of devices such as bridges. Fundamental mechanical properties, including Young’s modulus, Poisson’s ratio, and density, were estimated from first-principles calculations for 1-layer, 3-layer, and 6-layer nanoribbons with widths of 10 Å. The data achieved from the ab initio simulations supplied the finite-element model (FEM) of the nanoribbons. The directional coefficients of strain pressure curves were estimated as Young’s effective modulus since the structure is one-dimensional (1D). The modulus values were equal to 85.8, 111.8, and 134 GPa for 6, 3 and 1 layers, respectively. Moreover, the variation in Poisson’s coefficient for the armchair direction was significantly smaller than for the zigzag direction. Monotonic changes in this twist were observed for structures with 3 and 6 layers within the plane along the zigzag axis. The phosphorene nanoribbons subjected to periodic excitation behaved similarly to those subjected to static loading, while their whippiness was inversely proportional to the length. Next, the deflection under static force, resonance frequencies, and response to a variable driving force were calculated.

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Hysteresis and its impact on characterization of mechanical properties of suspended monolayer molybdenum-disulfide sheets

Abstract: The hysteresis phenomenon frequently arises in two-dimensional (2D) material nanoindentation, which is generally expected to be excluded from characterizing the elastic properties due to the imperfect elastic behaviour.

Cited by 7 publications

References 47 publications

Reduced Fracture Strength of 2D Materials Induced by Interlayer Friction

Reduced Fracture Strength of 2D Materials Induced by Interlayer Friction

Elastic Damper Based on the Carbon Nanotube Bundle

Atomic-Scale Finite-Element Modeling of Elastic Mechanical Anisotropy in Finite-Sized Strained Phosphorene Nanoribbons

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