Mechanical analysis of graphene-based woven nano-fabric

Zhang, Liuyang; Becton, Matthew; Wang, Xianqiao

doi:10.1016/j.msea.2014.10.036

Cited by 20 publications

(21 citation statements)

References 27 publications

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“…It is a specially effective technique to study the mechanics of nanostructures and has been employed in previous studies to understand the unraveling mechanics in graphene (Zhang et al., 2017) and effect of vacancy defects in failure strength of graphene nanoribbons (GNRs) (Zhang et al., 2016a, 2016b). MD has also been used to study woven fabric-like nanostructures, made of interlaced nanoribbons of graphene, showing that these woven nanofabrics (WNFs) with sparsely packed ribbons have much superior flexibility, toughness, and stretch strength as compared to pristine graphene sheets (Zhang et al., 2015). These advantageous properties serve to buttress the application of WNF as a solid platform for electronic sensors, solar cells, and supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Strength nature of two-dimensional woven nanofabrics under biaxial tension

Lahkar

Wei

et al. 2018

International Journal of Damage Mechanics

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Woven nanostructures have been acknowledged as a platform for solar cells, supercapacitors, and sensors, making them especially of interest in the fields of materials sciences, nanotechnology, and renewable energy. By employing molecular dynamics simulations, the mechanical properties of two-dimensional woven nanofabrics under biaxial tension are evaluated. Two-dimensional woven nanostructures composed of graphene and graphyne nanoribbons are examined. Dynamic failure process of both graphene woven nanofabric and graphyne woven nanofabric with the same woven unit cell initiates at the edge of interlaced ribbons accompanied by the formation of cracks near the crossover location of yarns. Further stress analysis reveals that such failure mode is attributed to the compression between two overlaced ribbons and consequently their deformation under biaxial tension, which is sensitive to the lattice structure of nanoribbon as well as the density of yarns in fabric. Systemic comparisons between nanofabrics with different yarn width and interval show that the strength of nanofabric can be effectively controlled by tuning the space interval between nanoribbons. For nanofabrics with fixed large gap spacing, the strength of fabric does not change with the ribbon width, while the strength of nanofabric with small gap spacing decreases anomalously with the increase in yarn density. Such fabric strength dependency on gap spacing is the result of the stress concentration caused by the interlace compression. The outcomes of simulation suggest that the compacted arrangement of yarns in carbon woven nanofabric structures should be avoided to achieve high strength performance.

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Section: Introductionmentioning

confidence: 99%

Strength nature of two-dimensional woven nanofabrics under biaxial tension

Lahkar

Wei

et al. 2018

International Journal of Damage Mechanics

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“…Graphene, as a two-dimensional material, has been extensively studied both experimentally and theoretically due to its extraordinary mechanical, optical and electronic properties in recent years [ 9 , 10 , 11 , 12 , 13 , 14 ]. It has been demonstrated that nanopores fabricated from graphene sheets can be made extremely thin and structurally robust to allow the identification of single nucleotides, which opens a new chapter in DNA sequencing [ 15 , 16 , 17 , 18 , 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

DNA Sequencing by Hexagonal Boron Nitride Nanopore: A Computational Study

Zhang

Wang

2016

Nanomaterials

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The single molecule detection associated with DNA sequencing has motivated intensive efforts to identify single DNA bases. However, little research has been reported utilizing single-layer hexagonal boron nitride (hBN) for DNA sequencing. Here we employ molecular dynamics simulations to explore pathways for single-strand DNA (ssDNA) sequencing by nanopore on the hBN sheet. We first investigate the adhesive strength between nucleobases and the hBN sheet, which provides the foundation for the hBN-base interaction and nanopore sequencing mechanism. Simulation results show that the purine base has a more remarkable energy profile and affinity than the pyrimidine base on the hBN sheet. The threading of ssDNA through the hBN nanopore can be clearly identified due to their different energy profiles and conformations with circular nanopores on the hBN sheet. The sequencing process is orientation dependent when the shape of the hBN nanopore deviates from the circle. Our results open up a promising avenue to explore the capability of DNA sequencing by hBN nanopore.

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“…Traditionally metals have been widely used for the energy absorption devices, relying on its structural failure and plastic deformation to mitigate impact energy [2,3]. Cellular forms including foams, honeycombs, and sandwich structures also perform excellently in mitigating dynamic loadings due to bulking and collapse mechanisms [4][5][6][7][8][9][10][11]. In addition, internal damping caused by the unique internal structure of composites exhibits favorable performance for the control of vibration due to impact [12,13].…”

Section: Introductionmentioning

confidence: 99%

Energy dissipation capability and impact response of carbon nanotube buckypaper: A coarse-grained molecular dynamics study

Chen

Zhang

Chen

et al. 2016

Carbon

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Carbon nanotube (CNT) buckypaper, a randomly non-woven fibrous film structure, has enjoyed its popularity in the sensor, actuator, filtration, and distillation devices owing to its exceptional mechanical and electrical properties. However, there is no report aimed at unraveling the fundamental mechanism of its energy-absorption capability under high-velocity impact despite its extraordinary frequency-and temperature-invariant viscoelastic properties. To bridge this gap, here coarse-grained molecular dynamics simulations are implemented to investigate effects of the external impact energy, the density of the buckypaper, and the length of individual CNTs on energy dissipation capability and dynamic response of the buckypaper under high-velocity impacts. Simulation results indicate that within its deformation limit the buckypaper possesses extremely high kinetic energy dissipation efficiency. The critical impact energy related to the deformation limit of the buckypaper tightly depends on the impact velocity since the same impact energy with a larger impact velocity yields less compression. The energy dissipation capability and impact response of the buckypaper are demonstrated to be independent of the length of individual SWCNTs. Overall, owing to the remarkable energy dissipation capability and flexibility of the buckypaper, it can be regarded as a promising candidate for energy dissipation.

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Mechanical analysis of graphene-based woven nano-fabric

Cited by 20 publications

References 27 publications

Strength nature of two-dimensional woven nanofabrics under biaxial tension

Strength nature of two-dimensional woven nanofabrics under biaxial tension

DNA Sequencing by Hexagonal Boron Nitride Nanopore: A Computational Study

Energy dissipation capability and impact response of carbon nanotube buckypaper: A coarse-grained molecular dynamics study

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