A microscope that scans the surface of a sample with a beam of electrons, causing a narrow channel of tunneling electrons to flow between the sample and the beam, and producing three-dimensional images of atomic topography and structure.
A type of electron microscope capable of generating a three-dimensional image showing individual atoms: it consists of a moving electrode that scans an object by means of a line of tunneling electrons that flow between the tip of the electrode and the object.
A microscope used to make images of individual atoms on the surface of a metal. The microscope has a probe with a small voltage applied to it ending in a tiny sharp tip (ideally consisting of one atom) that is moved close the material's surface. Quantum tunneling of electrons between tip and the metal provides a small current, and that current is held constant by varying the distance between the tip and the material's surface atoms. As the probe is moved across the surface, a three-dimension image of the surface is formed, based on the continual adjustments made to the height of the tip to keep the electron flow constant.