title: Adsorption of PTCDA on a partially KBr covered Ag(111) substrate.
abstract: Ordered growth of 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA) on Ag(111) partially covered by one or two monolayers of KBr was investigated by non-contact AFM with molecular resolution. Different adsorption patterns are found on the pure substrate, the one covered by a single monolayer, and the one covered by two monolayers KBr. Simulations with an extended Ising-type model reproduce these experimental patterns very well. The adsorbate-adsorbate and the adsorbate-substrate interaction parameters obtained from the simulation are discussed with respect to the interactions at the Ag(111)|KBr interface. As a result, alkali halide covered metals can be used for tuning the interactions and designing adsorption systems, which opens up new possibilities in the control of self-assembled nanostructures.
authors.affiliation: Institute of Applied Photophysics, TU Dresden, D-01062 Dresden, Germany.
authors.forename: Ch
authors.initials: Ch
authors.lastname: Loppacher
authors.forename: U
authors.initials: U
authors.lastname: Zerweck
authors.forename: L M
authors.initials: LM
authors.lastname: Eng
authors.forename: S
authors.initials: S
authors.lastname: Gemming
authors.forename: G
authors.initials: G
authors.lastname: Seifert
authors.forename: C
authors.initials: C
authors.lastname: Olbrich
authors.forename: K
authors.initials: K
authors.lastname: Morawetz
authors.forename: M
authors.initials: M
authors.lastname: Schreiber