XPS AND STM STUDIES OF PSEUDO-AGX MONOLAYERS ORGANIZED ON AG(111) ANDAU AG(111) SURFACES/

Simple and well-defined model AgX surfaces are useful to illuminate a variety of surface-related phenomena associated with AgX microcrystals in a different perspective with fewer experimental impediments. From this viewpoint, we discuss a couple of pseudo-AgX monolayers that can be organized on a highly planar sputter-grown Ag(lll) or ultrathin-Au- covered Ag(lll) film. The monolayer structures have been satisfactoril y characterized by combination of XPS and STM methods. In particular, the monolayer AgX formed on Au/Ag(lll) proved to have an almost identi cal structure with the bilayer AgX(111) atomic configuration, thus ser ving as a superior monolayer model of AgX or pseudo 2D ionic crystal f or deeper understanding of the processes involving the AgX surfaces. ( C) 1998 Wiley-Liss, Inc.