For instance, you could create a "nano drill punch" tool by making a circular rim at a relatively large and workable scale. Then, you seed the crystal and start it forming into a cone that tapers down to a very exact point with an exact angle and shape. The apex of the cone pierces a hole in a surface coating that can now fit a single layer of molecules that give the surface some desired property.
Such nano-construction techniques could possibly be performed with precision lasers, but some applications might benefit here by not having the laser's heat.
CATEGORY: Nanotechnology / Manufacturing / Technology