Building on more than a century of concerted effort to understand the friction behavior of 2D materials, we present a thermokinetic model for predicting the shear strength of MoS2 based on energetic barriers to sliding. This model accounts for a wide range of factors underlying the interaction between molecularly thin lamellae, including defects, temperature, crystallite size and commensurability. Findings are supported by results from thermally ramped sliding experiments and molecular dynamics simulations.
Sandia National Laboratories is a multi-mission laboratory managed and operated by National Technology and Engineering Solutions of Sandia, LLC., a wholly owned subsidiary of Honeywell International, Inc., for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525.
Bio
John Curry is a postdoctoral appointee in the Materials Mechanics & Tribology Division of Sandia National Laboratories. He received his Ph.D. in August 2017 under the mentorship of Prof. Brandon A. Krick at Lehigh University's Surface Interfaces and Materials Tribology Laboratory. His studies focused on fundamental mechanisms of friction and wear in Molybdenum Disulfide coatings, specifically on the role of microstructure in the response to environmental aging and degradation.