Abstract
Graphene, a two-dimensional carbon in honeycomb crystal with single-atom thickness, possesses extraordinary properties and fascinating applications. Graphene mechanics is very important, as it relates to the integrity and various nanomechanical behaviors including flexing, moving, rotating, vibrating, and even twisting of graphene. The relationship between the strain and stress plays an essential role in graphene mechanics. Strain can dramatically influence the electronic and optical properties, and could be utilized to engineering those properties. Furthermore, graphene with specific kinds of defects exhibit mechanical enhancements and thus the electronic enhancements. In this short review, we focus on the current development of graphene mechanics, including tension and compression, fracture, shearing, bending, friction, and dynamics properties of graphene from both experiments and numerical simulations. We also touch graphene derivatives, including graphane, graphone, graphyne, fluorographene, and graphene oxide, which carve some fancy mechanical properties out from graphene. Our review summarizes the current achievements of graphene mechanics, and then shows the future prospects.
Highlights
Graphene, a mechanically excellent material with Young’s modulus of 1 TPa and intrinsic strength of 130 GPa [1], has received significant interests since its discovery in 2004
The Young’s modulus of bilayer graphene is 0.8 TPa, smaller than that of monolayer graphene (1TPa), which was shown by the results from the nanoindentation simulated by molecular dynamics (MD) [59]
The mechanical properties of bilayer and multilayer graphene are reviewed, revealing that the mechanism of the change of mechanical properties caused by increasing graphene layers is still vague
Summary
A mechanically excellent material with Young’s modulus of 1 TPa and intrinsic strength of 130 GPa [1], has received significant interests since its discovery in 2004. Mechanical properties of graphene are part of the hottest topics in graphene research. Many articles about discoveries of mechanical properties have been published. These discoveries are helpful for the applications of graphene, because they have provided the data that reveal the mechanical nature of graphene. The prospects for potential applications of mechanical properties are highlighted
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