NIST logo

Publication Citation: Manipulation of Adsorbed Atoms and Creation of New Structures on Room-temperature Surfaces with a Scanning Tunneling Microscope

NIST Authors in Bold

Author(s): L Whitman; Joseph A. Stroscio; Robert A. Dragoset; Robert Celotta;
Title: Manipulation of Adsorbed Atoms and Creation of New Structures on Room-temperature Surfaces with a Scanning Tunneling Microscope
Published: January 01, 1991
Abstract: A general method of manipulating adsorbed atoms and molecules on room-temperature surfaces with the use of a scanning tunneling microscope is described. By applying an appropriate voltage pulse between the sample and probe tip, adsorbed atoms can be induced to diffuse into the region beneath the tip. The field-induced diffusion occurs preferentially toward the tip during the voltage pulse because of the local potential energy gradient arising from the interaction of the adsorbate dipole moment with the electric field gradient at the surface. Depending upon the surface and pulse parameters, cesium (Cs) structures from one nanometer to a few tens of nanometers across have been created in this way on the (110) surfaces of gallium arsenide (GaAs) and indium antimonide (InSb), including structures that do not naturally occur.
Citation: Science
Volume: 251
Issue: 4998
Pages: pp. 1206 - 1210
Research Areas: Scanning tunneling microscopy (STM)