Abstract
We have produced surface modifications on the 100 Å scale on an Re(0001) surface passivated by a saturation monolayer of sulfur and coated with a film of oil. By applying a potential of +3 V to the crystal, we could locally dissolve away part of the surface, creating a 50 Å deep hole. The surface damage after creation of the hole extends to the surrounding area in the form of atomic steps. Reversal of the bias from +3 to -3 V leads to migration of material onto the surface. Similar features are produced after gently touching the surface with the imaging tip of the STM assembly. Local barrier height images of the surface show a maximum on top of the deposits, which is indicative of a different chemical composition.
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