Pra.Ma.

An STM can modify the surface and material can be transported from the tip to the sample and back. If these actions can be performed in a controlled way widespread possibilities would arise: information storage devices, nanometer patterning technique, manipulations of big molecules and individual atoms, building of small devices.The most straightforward way to machine a surface by STM is by pushing the tip into the surface. This can result in a hole, but the tip can be damaged.