Abstract
The impact of 1-decanethiol self-assembled monolayer (SAM) formation and removal cycles on polycrystalline Au surfaces and SAM quality was studied with the help of CV, DPV, Pb-UPD, STM, and AFM. The SAM removal was accomplished by dissolution with oxygen radicals generated by UV photolysis of aqueous hydrogen peroxide. During the first Au-SAM formation and removal cycles, the surface roughness decreased. After that, the surface properties remained almost unaffected, indicating that the cyclic treatment removed the most reactive gold surface sites, until a rather stable surface resulted, which guaranteed highly reproducible SAM formation.
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