Strain softened bending modulus of graphene oxide

Yu, Songding; Jiao, Lei; Zhao, Jijun; Liu, Lizhao

doi:10.1016/j.cartre.2022.100167

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…Bending modulus is a parameter to determine the flexibility of a material, which can be calculated by analysing the relationship between the bending energy and bending curvature. To study the bending modulus, the G/h-BN heterostructures were curled the into nanotubes to simulate the bending behaviors [26][27][28]. From our calculations, the pristine graphene has a bending modulus of 1.501 eV in AC direction, and pristine h-BN exhibits a bending modulus of 1.16 eV in ZZ direction, agreeing well with previous reports [18,20,27].…”

Section: Bending Modulussupporting

confidence: 87%

Engineering the flexibility of graphene/h-BN lateral heterojunctions

Li,

Liu,

Huang

2024

J. Phys.: Conf. Ser.

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Employing the first-principles calculations, the mechanical properties of graphene/hexagonal boron nitride (h-BN) lateral heterojunctions were studied, including the Young’s modulus and bending modulus. It was found that by varying the ratio of graphene in the graphene/h-BN heterojunction, both the Young’s modulus and bending modulus of can be effectively engineered. Particularly, the bending modulus increases with the ratio of graphene to h-BN, providing a way to tailor the flexibility of two-dimensional materials.

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Section: Bending Modulussupporting

confidence: 87%

Engineering the flexibility of graphene/h-BN lateral heterojunctions

Li,

Liu,

Huang

2024

J. Phys.: Conf. Ser.

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“…Generally, structures with high atomic density usually possess large bending modulus [19]. As a result, tensile strain can significantly soften the bending modulus of graphene [33] and oxidized graphene [21] by stretching the bond length and decrease the atomic density.…”

Section: Resultsmentioning

confidence: 99%

“…All these planar graphene allotropes have lower bending moduli than that of graphene. Besides, the bending modulus is also related to the bending direction and thickness for the graphene allotropes and oxidized graphene [10,[19][20][21]. In contrast to the Young's modulus, few works about the flexibility of graphene heterojunctions were reported.…”

Section: Introductionmentioning

confidence: 99%

Engineering the flexibility and elastic modulus of graphene by heterojunctions

Liu,

Li,

Jiang

2024

Phys. Scr.

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Graphene shows both superior flexibility and excellent mechanical strength. The fabricated graphene samples usually contain various defects like grain boundaries, which can either enhance or weaken the mechanical strength of graphene. So, exploring the effects of grain boundaries on the flexibility of graphene is useful in designing graphene-based flexible devices. Employing the first-principles calculation, flexibilities of graphene heterojunctions were studied, aiming to tailor the flexibility of graphene by heterojunctions. Here, by connecting armchair (AC) and zigzag (ZZ) graphene through grain boundaries, graphene heterojunctions with tunable AC to ZZ ratio were constructed. It was found that bending moduli, as well as Young’s moduli, of graphene heterojunctions are lower than the pristine graphene and can be further tailored by the AC to ZZ ratio, making graphene heterojunctions more flexible than graphene. Particularly, changing the AC to ZZ ratio can even alter the relative flexibility of graphene heterojunctions in different directions. Therefore, graphene heterojunction provides an approach to engineer the flexibility of graphene, which is helpful in understanding the mechanical properties of two-dimensional materials and designing the flexible devices.

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