Superlubricity of carbon nanostructural films enhanced by graphene nanoscrolls.

• The graphite-like and fullerene-like carbon films' pair exhibits superlubricity. • The superlubricity originates from graphene nanoscroll formation at high load. • Their formation leads to an incommensurate sliding contact and a superlow COF of ~0.005. Recently, macroscopic superlubricity has been realized by forming spherical geometries at a sliding interface to cause nanoscopic point contact. Here, we showed macroscopic superlubricity (~0.005) enhanced by graphene nanoscrolls, which were formed at the sliding interface of a tribological pair composed of graphite-like and fullerene-like hydrogenated carbon films. [ABSTRACT FROM AUTHOR]