Engineering the boundary between 2-D and 3-D
materials

In recent years, engineers have found ways to modify
the properties of some “two- dimensional” materials, which are just
one or a few atoms thick, by stacking two layers together and
rotating one slightly in relation to the other. This creates what
are known as moiré patterns, where tiny shifts in the alignment of
atoms between the two sheets create larger-scale patterns. It also
changes the way electrons move through the material, in potentially
useful ways.