A metal nanostructure was fabricated on a Si(111) surface in ultrahigh vacu
um. The stages in the fabrication were H passivation of the surface, Pb eva
poration, depassivation of selected areas with the tip of a scanning tunnel
ing: microscope, and heating. Using this procedure, a nanowire and two cont
act pads to connect it to external probes were fabricated. At each stage of
the process, the surface was imaged with scanning tunneling microscopy. (C
) 1999 American Vacuum Society. [S0734-211X(99)08604-7].