We have studied butanethiol self-assembled monolayers on Au(100) using cyclic voltammetry and in
situ scanning tunneling microscopy (STM). The butanethiol adlayer shows ordered domains with a striped
structure, the stripes running parallel to the main crystallographic axes of the substrate. After modification
the surface reveals a 50% coverage of monoatomic high gold islands, but no vacancy islands were observed.
Reductive and oxidative desorption of the film, previously studied by electrochemistry, were monitored
by STM.
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