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STM/AFM
Scanning Tunneling Microscopy and Atomic Force Microscopy
(Dr. G. Meyer, Dr. R. Koch, S. Zoephel, Dr. L. Bartels, E. Henze, K. Schaeffer, K. Braun)
Research Fields
UHV-STM at room and high temperature
Several STMs operating in UHV with atomic
resolution have been developed to study the
structure of single crystal metal surfaces and
adsorbate systems as well as adsorbate induced
reconstructions.
[For example: Oxygen on
Co(10-10), R. Koch et al.: Phys. Rev. Lett. 71,
1047 (1993)].
Recently one instrument was
modified to allow operation up to 1000 K with
the aim to study deconstruction and phase
transitions.
Atom manipulation with low temperature STM
With an easy-to-operate versatile and low cost
STM developed by Dr. G. Meyer, which can be
operated between 15 and 300 K, we were able
to prove controlled manipulation of single
atoms and molecules as well as formation of
nanostructures on atomic scale. Decisive
progress was made recently as also native
substrate atoms can be released from different
high coordinated sites leading to the possibility
to restructure the substrate itself in an atom by
atom manner, whereby also deeper lying layers
can be included. Together with manipulation of
evaporated foreign substances this offers
exciting possibilities for the build-up of man-
made structures in the nanometer scale regime.
The wide temperature range allows also the
study of ordered weakly chemisorbed or
physisorbed species like the rare gases.
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