Abstract
The design and performance of a variable temperature, controlled atmosphere ultrahigh-vacuum scanning tunneling microscope (STM) system useful for the study of reactions on surfaces is described. The system incorporates a scanning tunneling microscope of the ‘‘Johnnie Walker’’ type into a versatile UHV system equipped with other diagnostic equipment necessary for studies of surface reactivity. The design is compatible with the combination of a wide variety of surface science measurements with STM. Vibration isolation of the microscope is simply accomplished by use of laminar flow isolation legs and inertial decoupling of the sample from the environment. Atomic resolution on metals can be achieved at temperatures between 125 and 400 K with a combination of continuous liquid–nitrogen cooling and radiative heating of the sample.
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