The Scanning Tunneling Microscope STM Images of Individual Atoms on Surfaces

The Scanning Tunneling Microscope (STM) Images of Individual Atoms on Surfaces 

A) Schematic diagram of the scanning tunneling microscope (STM) in which a tip of atomic dimensions glides across an atomic surface but does not touch it. Electrons are exchanged between the surface and the probe tip by quantum mechanical tunneling. B) The quantum corral was made by moving 48 iron atoms into a circle. 

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