Ultrahigh Ballistic Resistance of Twisted Bilayer Graphene

Peng, Qing; Peng, Sheng; Cao, Qiang

doi:10.3390/cryst11020206

Cited by 9 publications

(2 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This discovery could open the possibility of superconducting transistors to be constructed where the level of superconductivity could be varied by manipulating the intensity of the applied electric field. The discovery of superconductivity in twisted bilayer graphene was groundbreaking in the field of material science and was followed by a sudden rise in research concerning twistronic materials [7][8][9][10][11]. The scope of this discovery also extended to other Moirépatterned 2D materials that exhibit superconductivity, such as twisted bilayer tungsten diselenide (WSe 2 ) and boron nitride (BN) between layers of graphene [12,13].…”

Section: Introductionmentioning

confidence: 99%

Atomic Insights into Fracture Characteristics of Twisted Tri-Layer Graphene

2021

Self Cite

View full text Add to dashboard Cite

Graphene twistronics have recently gained significant attention due their superconductive behavior as a consequence of their tunable electronic properties. Although the electronic properties of twisted graphene have been extensively studied, the mechanical properties and integrity of twisted trilayer graphene (tTLG) under loading is still elusive. We investigated the fracture mechanics of tTLG with a twist angle of ±1.53° utilizing molecular dynamics simulation. This twist angle was chosen because it is known to exhibit highly superconductive behavior. The results indicate that tTLG does not preserve the excellent mechanical properties typically associated with graphene, with toughness and fracture strain values much lower in comparison. The Young’s modulus was an exception with values relatively close to pristine graphene, whereas the tensile strength was found to be roughly half of the intrinsic strength of graphene. The fracture toughness, fracture strain and strength converge as the crack length increases, reaching 0.26 J/m3, 0.0217 and 39.9 GPa at a crack length of 8 nm, respectively. The Griffth critical strain energy is 19.98 J/m2 and the critical stress intensity factor Kc is 4.47 MPa M1/2, in good agreement with that of monolayer graphene in the experiment. Our atomic insights might be helpful in the material design of twisted trilayer graphene-based electronics.

show abstract

Section: Introductionmentioning

confidence: 99%

Atomic Insights into Fracture Characteristics of Twisted Tri-Layer Graphene

2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, conducting mechanical testing on two-dimensional carbon materials through experimental means is challenging due to limitations and errors in material preparation and experimental methods. Consequently, an increasing number of researchers are turning to numerical simulation methods to investigate the mechanical properties of carbon allotropes [ 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ]. Peng et al [ 36 ] employed first-principles calculations to predict the impact of pressure on graphyne’s second-order elastic constants, in-plane Young’s modulus, and Poisson’s ratio.…”

Section: Introductionmentioning

confidence: 99%

Effect of Strain Rate, Temperature, Vacancy, and Microcracks on Mechanical Properties of 8-16-4 Graphyne

Peng,

Huang,

Chen

et al. 2024

Nanomaterials

Self Cite

View full text Add to dashboard Cite

The 8-16-4 graphyne, a recently identified two-dimensional carbon allotrope, exhibits distinctive mechanical and electrical properties, making it a candidate material for flexible electronic applications. This study endeavors to enhance our comprehension of the fracture behavior and mechanical properties of 8-16-4 graphyne. The mechanical properties of 8-16-4 graphyne were evaluated through molecular dynamics simulations, examining the impact of boundary conditions, temperature, and strain rate, as well as the coupled interactions between temperature, vacancy defects, and microcracks. The findings reveal that 8-16-4 graphyne undergoes fracture via the cleavage of ethylene bonds at a critical strain value of approximately 0.29. Variations in boundary conditions and strain rate influence the fidelity of tensile simulation outcomes. Temperature, vacancy concentration, and the presence of microcracks markedly affect the mechanical properties of 8-16-4 graphyne. In contrast to other carbon allotropes, 8-16-4 graphyne exhibits a diminished sensitivity to vacancy defects in its mechanical performance. However, carbon vacancies at particular sites are more prone to initiating cracks. Furthermore, pre-existing microcracks within the material can potentially alter the fracture mode.

show abstract

Graphene-based photocatalytic nanocomposites used to treat pharmaceutical and personal care product wastewater: A review

et al. 2022

Environ Sci Pollut Res

View full text Add to dashboard Cite

Ultrahigh Ballistic Resistance of Twisted Bilayer Graphene

Cited by 9 publications

References 45 publications

Atomic Insights into Fracture Characteristics of Twisted Tri-Layer Graphene

Atomic Insights into Fracture Characteristics of Twisted Tri-Layer Graphene

Effect of Strain Rate, Temperature, Vacancy, and Microcracks on Mechanical Properties of 8-16-4 Graphyne

Graphene-based photocatalytic nanocomposites used to treat pharmaceutical and personal care product wastewater: A review

Contact Info

Product

Resources

About