[2Ep01-05] Toward Multiscale Tribology Bridging Nano- and Macro-scale: Science of Friction Division's Session

[2Ep04] Friction beyond scale at twisted graphene interface

*Naruo Sasaki¹ (1. Department of Engineering Science, Graduate School of Informatics and Engineering, The University of Electro-Communications)

The mechanism of superlubricity of the monolayer graphene sheet absorbed onto the graphite substrate surface was studied using Moiré science. Moiré pattern of stacking lattice and force map were calculated as a function of the twisted angle and sliding distance. The interaction between the graphene sheet and graphite substrate surface was numerically and theoretically calculated. If the loading and lateral forces and the orientation angle are normalized, the universal scaling law of the anisotropy spectrum independent of the sheet size appears. Thus, the correlation between the true contact area and the loading and lateral forces is independent of the sheet size, suggesting the possibility of controlling adhesion and superlubricity based on universal scaling laws.