[1P01-52] Poster Presentation

[1P05] Superlubricity of C₆₀ molecular bearings - effect of interlacated molecular orientation

*Yusuke Tani¹, Takuya Mizoguchi¹, Naruo Sasaki¹ (1. University of Electro-Communications)

The graphite/C₆₀/graphite interface plays an important role in the atomic-scale ultralow friction of C₆₀ intercalated grahite. In this paper, the mechanism of superlubricity of graphite/C₆₀/graphite interface is numerically studied using molecular mechanics. The simulated interlayer distances of about 1.3 nm are in good agreement with previous experimental results. Next, the frictional feature along the commensurate direction of the graphene/C₆₀ /graphene interface is investigated. It is clarified that the small rotation and elastic contact of C₆₀ molecules are the origins of the superlubricity of the graphene/C₆₀/graphene interface along the commensurate scan direction. Anisotropy of the superlubricity of the C₆₀ bearing system is obtained. Furthermore, the effect of the molecular orientation of C₆₀ on the Amonton-Coulomb's law is also studied, which tells us the close relationship between molecular friction and the molecular-scale local structures.