Imperfections in the regular atomic arrangements in crystals determine many of the properties of a material, and their diffusion is behind many microstructural changes in solids. However, imaging ...

The tracking of individual atoms diffusing in a cold, rarefied gas reveals the influence that a single impact has on randomizing the motion. Atom tracer. An optical trap holds a cloud of rubidium ...

Scientists have created a new structure by encapsulating a single layer of fullerene molecules between two graphene sheets. Buckyball sandwiches combine fullerenes and graphene. This structure allows ...

(Phys.org)—As long as the temperature is above absolute zero, gas molecules are always in constant random motion. They may diffuse—or spread out—through three-dimensional space or, in a process called ...