Measurement of the Elastic Properties and Intrinsic Strength of Monolayer Graphene
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Cites background or methods from "Measurement of the Elastic Properti..."
...0 TPa and the ultimate breaking strength of 130 GPa by indenting the center of a series of monolayer graphene membranes with a diamond-coated tip using atomic force microscopy (AFM).(2) Gomez-Navarro et al....
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...0 TPa, corresponding to E 342 30 N/m.(2) Therefore, E of the G O monolayer platelets studied here is about half that of graphene....
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...165, the value for graphite in the basal plane.(2,59) Displacements at the center of the membrane were calculated at 10 GPa and 2 MPa increments for elastic moduli and prestresses, respectively....
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...Monolayer graphene obtained from mechanically cleaved graphite has a measured Young’s modulus of 1.0 TPa, corresponding to E2D 342 30 N/m.2 Therefore, E2D of the G O monolayer platelets studied here is about half that of graphene....
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...Graphene can be modeled as a two-dimensional (2D) membrane with no bending stiffness.(2) However, the addition of oxygen atoms in G O...
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Additional excerpts
...In equation (1) the four terms represent, respectively, (1) stretching of the membrane due to the pressure difference across it, Dp1⁄4 pint 2 pext (we calculate this by equating the strain energy in the deformed membrane to the work done by the expanding gas during deformation, which is easier to directly calculate, and then simplifying the results using Hencky’s relations for the pressuredeflection and pressure-blister volume); (2) graphene/SiO2 adhesion; (3) expansion of the gas in the chamber from V0 to a final volume V0þ Vb(a); and (4) work done on the gas held at a fixed external pressure pext....
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References
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