The effect is strong for a single layer of graphene because the graphene is so flexible that the atoms can move to locations of better contact with the tip. (sciencedaily.com)
Researchers had previously found that while one layer of graphene on a surface reduces friction, having a few more was even better. (sciencedaily.com)
It is a piece of clear tape embedded with a tattoo - like design made from multiple layers of graphene flakes. (sciencenewsforstudents.org)