Electrons near roughened Ag and Au surfaces with chemisorbed dielectric overlayers of alkanethiol or alkaneselenol self-assembled monolayers are shown to move within the sulfur or selenium head-group layer on the metal terraces. The electrons exist in image states with respect to Ag or Au step edges. There is no substantial image force between the electrons and the terraces.
Clark, Brian K.; Gregory, Brian W.; and Standard, Jean M., "Electrons in image states near roughened metal surfaces" (2000). Faculty Publications – Chemistry. Paper 4.