Recoverable Slippage Mechanism in Multilayer Graphene Leads to Repeatable Energy Dissipation

ACS Nano
Xiaoding WeiHoracio D Espinosa

Abstract

Understanding the deformation mechanisms in multilayer graphene (MLG), an attractive material used in nanodevices as well as in the reinforcement of nanocomposites, is critical yet challenging due to difficulties in experimental characterization and the spatiotemporal limitations of atomistic modeling. In this study, we combine nanomechanical experiments with coarse-grained molecular dynamics (CG-MD) simulations to elucidate the mechanisms of deformation and failure of MLG sheets. Elastic properties of graphene sheets with one to three layers are measured using film deflection tests. A nonlinear behavior in the force vs deflection curves for MLGs is observed in both experiments and simulations: during loading/unloading cycles, MLGs dissipate energy through a "recoverable slippage" mechanism. The CG-MD simulations further reveal an atomic level interlayer slippage process and suggest that the dissipated energy scales with film perimeter. Moreover, our study demonstrates that the finite shear strength between individual layers could explain the experimentally measured size-dependent strength with thickness scaling in MLG sheets.

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Citations

Sep 3, 2016·Biosensors & Bioelectronics·Erhan ZorArben Merkoçi
Jul 7, 2017·Journal of Chemical Theory and Computation·Jun-Jun ShangXia Liu
Jul 20, 2017·ACS Applied Materials & Interfaces·Charalampos AndroulidakisCostas Galiotis
Nov 3, 2017·Nanoscale·Bongkyun JangTakayuki Kitamura
Jan 12, 2019·Physical Chemistry Chemical Physics : PCCP·Ning LiuXianqiao Wang
Jan 24, 2019·Nanoscale·Kunqi WangQuanshui Zheng
May 6, 2019·Nanoscale·Jinxin LiuLei Fu
Aug 5, 2017·Physical Review Letters·Guorui WangZhong Zhang
May 22, 2020·Nanotechnology·Cheng WangHuaqiang Cao
Mar 30, 2020·Nature Communications·Charalampos AndroulidakisCostas Galiotis
May 23, 2018·ACS Nano·Wenjie XiaJack F Douglas
Oct 20, 2018·Nano Letters·SunPhil KimArend M van der Zande
Dec 23, 2021·Science Advances·Nitant GuptaBoris I Yakobson

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