Frictional Dissipation and Scaling Laws at van der Waals Interfaces: The Role of Edge and Corner Elastic Moiré Pinning
Source abstract
Abstract
van der Waals heterogeneous interfaces are promising candidates for the scaling-up of structural superlubricity to meet a wide range of applications. Several factors, however, have been identified that may hinder superlubricity. Elasticity is one such intrinsic factor, where shear induced lattice reconstruction leads to local interfacial pinning, even at clean pristine contacts. This introduces intricate energy dissipation mechanisms that are manifested by unconventional frictional scaling laws. Here, through large-scale atomistic simulations, we reveal that the elastic pinning of incomplete moiré tiles at the corners of polygonal sliders dominates kinetic friction up to contact dimensions of hundreds of nanometers, followed by a crossover to edge, and eventually surface dominated frictional regimes. We further demonstrate that slider shape tailoring and twisting allow to control energy dissipation and its scaling with contact size, thus advancing the quest toward achieving large-scale superlubricity.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Force Microscopy Techniques and Applications · Adhesion, Friction, and Surface Interactions · Mechanical and Optical Resonators
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics
University of Science and Technology of China
Department of Engineering Mechanics, School of Civil Engineering
Wuhan University
State Key Laboratory of Water Resources Engineering and Management
Department of Physical Chemistry, School of Chemistry, The Raymond and Beverly Sackler Faculty of Exact Sciences and The Sackler Center for Computational Molecular and Materials Science
Tel Aviv University
Funding
University of Science and Technology of China · Science and Technology Foundation of Shenzhen City · Center for Nanoscience and Nanotechnology, Tel Aviv University · United States - Israel Binational Science Foundation · Tel Aviv University · Wuhan University · National Natural Science Foundation of China
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