Negative poisson's ratio in rippled graphene
WebNegative Poisson's ratio (NPR) in auxetic materials is of great interest due to the typically enhanced toughness, shear resistance, and sound and vibration absorption, which enables plenty of novel applications such as aerospace and defense. Insight into the mechanism underlying NPR is significant to the design of auxetic nanomaterials and ... WebFor the rippled graphene sheet η = 0.188, a negative Poisson's ratio of -0.38 is observed for a tensile strain up to 8%, while the Poisson's ratio for η = 0.066 is almost zero.
Negative poisson's ratio in rippled graphene
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WebDec 15, 2014 · Graphene can be made auxetic through the introduction of vacancy defects. This results in the thinnest negative Poisson's ratio material at ambient conditions … WebMar 17, 2024 · We find that the Poisson's ratio can be effectively tuned by increasing the degree of oxidation of graphene oxide. More specifically, the Poisson's ratio decreases …
WebAug 30, 2024 · As the buckling modes of CFs are topographically different when they are compressed in different directions, their negative Poisson's ratio is found to be strongly anisotropic, which is in contrast to the isotropic positive Poisson’s ratio observed in CFs prior to buckling. Using molecular dynamics simulations, we find an in-plane negative … WebIt is found that the value of the Poisson's ratio of graphene can be effectively tuned from positive to negative by varying the percentage of hydrogenation. Specifically, the …
WebApr 20, 2024 · Qin H, Sun Y, Liu JZ, Li M, Liu Y (2024) Negative Poisson’s ratio in rippled graphene. Nanoscale 9(12):4135–4142. Article Google Scholar Ho VH, Ho DT, Kwon SY, Kim SY (2016) Negative Poisson’s ratio in periodic porous graphene structures. Phys Status Solidi B 253(7):1303–1309 WebJun 6, 2016 · To obtain a negative Poisson's ratio, simple voids were periodically introduced into graphene. We showed that the Poisson's ratio of the designed graphene structure is strongly dependent on the aspect ratio of the voids, and it can approach the theoretical limit of −1.0. More importantly, the graphene periodic structure maintains its …
WebYoung’s modulus and the Poisson’s ratio of graphene.35 The Figure 1. Negative Poisson’s ratio in graphene. (a) The resultant strain ϵ y versus the applied strain ϵ x. A robust valley point exists at ϵ x = 0.06 in all curves for varying simulation parameters using both MD or MS approaches. (b) The Poisson’s ratio extracted from the MS ...
WebFigure 3: (Color online) Poisson’s ratio for graphene from Set I. a) Strain dependence for Poisson’s ratio. Inset displays the strain-strain relation for graphene with width 29.51 Å, in which graphene expands in the y-direction when it is stretched in the x-direction by strain smaller than ǫc = 0.005, indicating the NPR effect. b) The strain dependence for the z … basfi hamburg organigrammWebFor the rippled graphene sheet η = 0.188, a negative Poisson's ratio of −0.38 is observed for a tensile strain up to 8%, while the Poisson's ratio for η = 0.066 is almost zero. During uniaxial tension, the ripples gradually become flat, thus the Poisson's ratio of rippled graphene is determined by the competing factors of the intrinsic ... bas filing due datesWebQin et al. (2024) found that the Poisson's ratio of rippled graphene decreases upon increasing the ratio between ripple amplitude over wavelength, and a negative … szmal programWebJun 6, 2016 · To obtain a negative Poisson's ratio, simple voids were periodically introduced into graphene. We showed that the Poisson's ratio of the designed … basfi kitaWebMar 17, 2024 · We find that the Poisson's ratio can be effectively tuned by increasing the degree of oxidation of graphene oxide. More specifically, the Poisson's ratio decreases linearly from positive to negative with increasing oxidation, turning negative at room temperature for a degree of oxidation of 0.27, and reaching a value of -0.567 for fully ... szli iskolaWebto achieve the NPR in graphene.25 The Poisson’s ratio for graphene can also be driven into the negative regime by thermally induced ripples at high temperatures above 1700 K.22 In contrast, the NPR revealed in the present work represents an … szmat krajuWebMar 23, 2024 · Through MD simulations, we have found that the Poisson's ratio of rippled graphene decreases upon increasing its aspect ratio η (amplitude over wavelength). For … szmaragd cena za karat