XPS STUDIES OF SELF-ASSEMBLED MULTILAYER FILMS

Self-assembled-mono- and multilayer films have been formed via selecti ve ionic interactions.(1) Two types of molecule have been used, straig ht chain mercaptoalkanoic acids and those containing chromophores: HS( CH2)(15)COOH and HS(CH2)(11)O-C6H4-SO2(CH2)(5)COOH. To better understa nd the formation process, XPS studies have been performed. Models are presented for various possible orientational structures, and evidence for a preferred orientation is given. The oxidation state of the coppe r ions within the films has been unambiguously determined.