Abstract:
The mechanical characteristics of diamond-like films, such as Dn21.8, Dn27.8, and Dn29.4 moiré diamanes, formed by the hydrogenation of graphene layers twisted at an angle of about 30$^\circ$, and of conventional diamane (Dn) based on bilayer graphene with the AB packing are simulated using the molecular mechanics approach. The elastic moduli of these materials are calculated. It is shown that the elastic constants for moiré diamanes differ noticeably from similar constants of Dn diamane, and their fracture occurs at higher strains than at those for the latter. The responses to forces applied in the plane of the films turn out to be anisotropic for the Dn21.8 and Dn27.8 structures and almost isotropic for Dn29.4. It is shown that the breakthrough for the Dn29.4 membrane under the action of a tip occurs at a larger force than that for the membrane made of the most energetically stable Dn27.8 diamane.
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