One‐ and Two‐Dimensional Diffusion of Metal Atoms in Graphene

Abstract

The migration of individual Au and Pt atoms in graphene layers (see image) is observed by high-resolution TEM. In situ experiments at 600–700 °C show that two-dimensional diffusion within the plane of the layer and the one-dimensional diffusion along the open edges occurs with activation energies of 2.3–2.5 eV. It is shown that metal atoms strongly interact with carbon in graphene.