Diffusion of pyrene molecules: thetransition to ballistic diffusion

Graphite surfaces are an ideal playground for studying the fundamentals of two-dimensional diffusion processes and friction using neutron scattering. In a recent experiment we...石墨表面（graphite surfaces）是利用中子散射（neutron scattering）研究二维扩散过程与摩擦基本原理的理想实验平台。在近期的一项实验中，我们……