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Atomistic Origins of Temperature-Dependent Shear Strength in 2D Materials

Curry, John C.; Hinkle, Adam H.; Babuska, Tomas F.; Wilson, Mark A.; Dugger, Michael T.; Krick, Brandon A.; Argibay, Nicolas A.; Chandross, M.

We present a model that predicts the macroscale temperature-dependent interfacial shear strength of 2D materials like MoS2 based on atomistic mechanisms and energetic barriers to sliding. Atomistic simulations were used to systematically determine the lamellar size-dependent rotation and translation energy barriers, that were used to accurately predict a broad range of experimental data. This framework provides insight about the origins of characteristic shear strengths of 2D materials. ©