Electron
beam-induced surface activation (EBISA) has been used
to grow wires of iron on rutile TiO2(110)-(1 × 1)
in ultrahigh vacuum. The wires have a width down to ∼20 nm
and hence have potential utility as interconnects on this dielectric
substrate. Wire formation was achieved using an electron beam from
a scanning electron microscope to activate the surface, which was
subsequently exposed to Fe(CO)5. On the basis of scanning
tunneling microscopy and Auger electron spectroscopy measurements,
the activation mechanism involves electron beam-induced surface reduction
and restructuring.
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