Unexpected speed-dependent friction Surprisingly, the friction between the tip of an In the macro world, friction doesn’t depend on the speed at atomic force microscope and the Moiré super- which two surfaces move past one another, but researchers structures depends on the speed at which the tip is moved across the surface. (Image: Department from Basel and Tel Aviv have now observed precisely this effect of Physics, University of Basel and Scixel) in special graphene structures on a platinum surface. Media release: http://bit.ly/3Yz7495 SNI Annual Report 2022 29