Iron Islands on Gold (111)

We deposited a sub monolayer amount of iron onto a clean gold (111) single crystal in order to test our sample preparation capabilities. The gold crystal was cleaned by cycles of Ar ion sputtering and annealing. The iron was then deposited using an electron beam evaporator. Iron, like (almost?) any metal starts to grow at the corner positions of the herringbone reconstruction forming small triangular or hexagonal islands.

3D rendering of Fe/Au. The scan size is 50x50 nm2

Since the islands confine the electrons, energy dependent patterns of standing waves can be observed.

Topography (20x20 nm2) and spectroscopy taken at 100 mV and 400 mV respectively.