We have designed and constructed an ultrahigh vacuum, low temperature atomic force microscope/scanning tunneling microscope which operates from 19K to 400K. The entire AFM/STM is cooled by connection through a mechanical heat switch to a liquid helium bath cryostat. The instrument is surrounded by both liquid helium temperature and liquid nitrogen temperature radiation shields, both of which have movable doors for interchange of both samples and tips.
This instrument has most recently been used to study the effect of deposition pressure on the adsorbate structure and coverage for the system of oxygen on W(110).
This material is based upon work supported by the National Science
Foundation under Grant No. 9522240.
Any opinions, findings and conclusions or recomendations expressed in this
material are those of the author(s) and do not necessarily reflect the views of
the National Science Foundation (NSF).
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