Soft-Chemical Growth of #gamma#-FeO (OH) Films on Self-Assembled Monolayers of Substituted Alkylthiols on Gold (111)

摘要

The placement of clean or specific thiol-coated gold surfaces in solutions of Fe~(III) that are below supersaturation results in the growth of thin films of lepidocrocite #gamma#-FeO (OH) at room temperature. The use of gold substrates has allowed a variety of characterization techniques to be employed to monitor changes on the surface. Surface plasmon spectroscopy reveals the specific preference of the growing material for sulfonate-terminated surfaces, although high yields are also obtained on clean gold substrates. Mossbauer spectroscopy reveals that the deposited material displays particle size effects. The morphology of the #gamma#-FeO(OH) particles formed on the surface has been detailed through atomic force microscopic investigations.