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SUMMARY:Surface diffusion on the atomic scale - Graznya Antczak\, Departme
 nt of Physics\, University of Wroclaw\, Poland
DTSTART:20120126T160000Z
DTEND:20120126T170000Z
UID:TALK34687@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:How do metal atoms diffuse over a surface? We have carried out
  extensive studies with the field ion microscope\, and by determining the 
 distribution of atom displacements over the surface we are able to deduce 
 the nature of the jumps in the diffusion process. From these studies it ap
 pears that even at relatively low temperatures\, diffusion occurs preferen
 tially by longer jumps rather than by nearest-neighbor transitions.\nHow d
 o organic molecules move over a surface? I will present a study of the dif
 fusion of phthalocyanine on the silver (100) surface in the STM. I will di
 scuss the importance of the chemical identity of the central atom of pthal
 ocyanine for the thermal motion of quasi-isolated molecules\, the ratio of
  translational to rotational transitions\, and adsorption geometry.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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