Investigation on fracture of pre-cracked single-layer graphene sheets

Liu, Xuefeng; Bie, Zhiwu; Wang, J.B.; Sun, Ligang; Tian, Ming; Öterkuş, Erkan; He, Xiaoqiao

doi:10.1016/j.commatsci.2018.12.014

Cited by 16 publications

(6 citation statements)

References 63 publications

(69 reference statements)

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“…Despite the importance of fracture mechanics in 2D, currently, most of the studies used atomistic simulations [molecular dynamics or density functional theory (DFT)] to understand the fracture processes (15)(16)(17)(18)(19)(20). Previous microscopic or mesoscopic fracture or tensile experiments on 2D materials, either by atomic force microscopy indentation or microelectromechanical system stages (6)(7)(8), have not directly addressed the atomic-scale processes.…”

Section: Introductionmentioning

confidence: 99%

Anomalous fracture in two-dimensional rhenium disulfide

et al. 2020

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Low-dimensional materials usually exhibit mechanical properties from those of their bulk counterparts. Here, we show in two-dimensional (2D) rhenium disulfide (ReS2) that the fracture processes are dominated by a variety of previously unidentified phenomena, which are not present in bulk materials. Through direct transmission electron microscopy observations at the atomic scale, the structures close to the brittle crack tip zones are clearly revealed. Notably, the lattice reconstructions initiated at the postcrack edges can impose additional strain on the crack tips, modifying the fracture toughness of this material. Moreover, the monatomic thickness allows the restacking of postcrack edges in the shear strain–dominated cracks, which is potentially useful for the rational design of 2D stacking contacts in atomic width. Our studies provide critical insights into the atomistic processes of fracture and unveil the origin of the brittleness in the 2D materials.

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Section: Introductionmentioning

confidence: 99%

Anomalous fracture in two-dimensional rhenium disulfide

et al. 2020

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“…Graphene is a new two−dimensional honeycomb lattice material formed by the accumulation of sp 2 carbon atoms [ 106 ]. In recent years, many scholars have studied the combination of different materials and graphene to further improve the Sb and As adsorption performance.…”

Section: Application Of Frontier Adsorption Materials To Remove Antim...mentioning

confidence: 99%

“…A single layer of carbon atoms arranged in the form of a two−dimensional honeycomb lattice makes up graphene. It is very elastic and thermally and electrically conductive [ 106 ]. With the benefits of a high specific surface area, strong hydrophilicity, and low toxicity, graphene oxide (GO), a graphene derivative, may efficiently remove heavy metals from wastewater while overcoming the drawbacks of graphene’s hydrophobicity [ 107 ].…”

Section: Introduction Of Frontier Adsorption Materialsmentioning

confidence: 99%

Frontier Materials for Adsorption of Antimony and Arsenic in Aqueous Environments: A Review

Song

Zheng

et al. 2022

IJERPH

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As highly toxic and carcinogenic substances, antimony and arsenic often coexist and cause compound pollution. Heavy metal pollution in water significantly threatens human health and the ecological environment. This article elaborates on the sources and hazards of compound antimony and arsenic contamination and systematically discusses the research progress of treatment technology to remove antimony and arsenic in water. Due to the advantages of simple operation, high removal efficiency, low economic cost, and renewable solid and sustainable utilization, adsorption technology for removing antimony and arsenic from sewage stand out among many treatment technologies. The adsorption performance of adsorbent materials is the key to removing antimony and arsenic in water. Therefore, this article focused on summarizing frontier adsorption materials’ characteristics, adsorption mechanism, and performance, including MOFs, COFs, graphene, and biomass materials. Then, the research and application progress of antimony and arsenic removal by frontier materials were described. The adsorption effects of various frontier adsorption materials were objectively analyzed and comparatively evaluated. Finally, the characteristics, advantages, and disadvantages of various frontier adsorption materials in removing antimony and arsenic from water were summarized to provide ideas for improving and innovating adsorption materials for water pollution treatment.

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“…crack growth) for the reason that the spatial derivatives in CCM theory can lose its meaning at discontinuities. For discontinuity related problems such as crack propagation in graphene, MD simulation methods are mostly used for the discrete atomistic systems [2][3][4][5][6][7][8]. However, fully atomistic simulations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Peridynamic Simulation of Fracture in Polycrystalline Graphene

Liu

Öterkuş

et al. 2022

J Peridyn Nonlocal Model

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Defect free graphene is believed to be the strongest material. However, the effective strength of engineering used large-area graphene in which defects are inevitable is actually determined by the fracture toughness, rather than the intrinsic strength that governs the breakage of atomic bonds in perfect graphene. Due to the limitations of commonly adopted experiments, conventional continuum mechanics based methods and fully atomistic simulations, fracture of polycrystalline graphene under uniaxial tensile load is explored by performing peridynamic (PD) simulations in this paper.The fracture strength, the fracture strain and the fracture toughness of polycrystalline graphene, as well as the grain size effect and the temperature effect on such quantities, are studied in this work. The results show that the fracture strength of polycrystalline graphene and the grain size follows an inverse pseudo Hall-Petch relation. The fracture strain and the fracture toughness of polycrystalline graphene decrease with a decrease in the grain size. Increasing temperature can also weaken the fracture properties of graphene. The results can provide guidelines for the applications of polycrystalline graphene in nano devices. This study also expands the application of peridynamics and presents a new way to study the fracture of graphene.

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Investigation on fracture of pre-cracked single-layer graphene sheets

Cited by 16 publications

References 63 publications

Anomalous fracture in two-dimensional rhenium disulfide

Anomalous fracture in two-dimensional rhenium disulfide

Frontier Materials for Adsorption of Antimony and Arsenic in Aqueous Environments: A Review

Peridynamic Simulation of Fracture in Polycrystalline Graphene

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