Magnetene: Graphene-like 2D material leverages quantum effects to achieve ultra-low friction
— Read on phys.org/news/2021-11-magnetene-graphene-like-2d-material-leverages.html

…”While graphene is made of carbon, magnetene is made from magnetite, a form of iron oxide, which normally exists as a 3D lattice. The team’s collaborators at Rice University treated 3D magnetite using high-frequency sound waves to carefully separate a layer consisting of only a few sheets of 2D magnetene.