Atomic-scale surface modifications using a tunnelling microscope

  title={Atomic-scale surface modifications using a tunnelling microscope},
  author={Ralph S. Becker and Jene A. Golovchenko and B. S. Swartzentruber},
The desire to modify materials on the smallest possible scale is motivated by goals ranging from high-density information storage to the purposeful transformation of genetic material. Here we report an atomic-scale modification of the surface of a nearly perfect germanium crystal, effected by the tungsten tip of a tunnelling microscope. We believe this to be the smallest spatially controlled, purposeful transformation yet impressed on matter and we argue that the limit set by the discreteness… CONTINUE READING