Superlubricity of C₆₀ Intercalated Graphite Films (Keynote)

The frictional behavior of the C₆₀ intercalated graphite films with a large size of 2.3×2.3mm² is reported. The C₆₀ intercalated graphite films consist of alternating close-packed C₆₀ monolayers and graphite layers (graphenes), and thus many sliding planes are formed between each C₆₀ monolayer and graphene. The intercalation of C₆₀ molecules into graphite films results in superlubricity where frictional forces are observed to be stationarily zero.