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Untersuchungen zur Wechselwirkung von gasf?rmigem molekularem Iod mit Silberoberfl?chen mittels XPS und AES
Authors:H. Moers   H. Klewe-Nebenius   G. Pfennig und H. J. Ache
Affiliation:(1) Kernforschungszentrum Karlsruhe, Institut für Radiochemie, Postfach 3640, D-7500 Karlsruhe 1, Bundesrepublik Deutschland
Abstract:Summary The adsorption of gaseous molecular iodine on clean silver surfaces proceeds in the first stage by dissociative chemisorption. After the formation of half a monolayer of chemisorbed iodine atoms the formation of silver iodide begins, which forms a very regular overlayer on top of the substrate. Both iodine species can be distinguished due to a difference in chemical shift of the M4N4, 5N4, 5-Auger transitions. After completion of this overlayer further iodine uptake is slowed down significantly. Above an overlayer thickness of about 10 nm a further progress of the reaction cannot be followed anymore due to the limited information depth of XPS.
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