title: Density-dependent reorientation and rehybridization of chemisorbed conjugated molecules for controlling interface electronic structure.
abstract: The adsorption of the molecular acceptor hexaazatriphenylene-hexacarbonitrile on Ag(111) was investigated as function of layer density. We find that the orientation of the first molecular layer changes from a face-on to an edge-on conformation depending on layer density, facilitated through specific interactions of the peripheral molecular cyano groups with the metal. This is accompanied by a rehybridization of molecular and metal electronic states, which significantly modifies the interface and surface electronic properties, as rationalized by theoretical modeling.
authors.affiliation: Institut für Physik, Humboldt-Universität zu Berlin, Newtonstrasse 15, D-12489 Berlin, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Bröker
authors.forename: O T
authors.initials: OT
authors.lastname: Hofmann
authors.forename: G M
authors.initials: GM
authors.lastname: Rangger
authors.forename: P
authors.initials: P
authors.lastname: Frank
authors.forename: R-P
authors.initials: RP
authors.lastname: Blum
authors.forename: R
authors.initials: R
authors.lastname: Rieger
authors.forename: L
authors.initials: L
authors.lastname: Venema
authors.forename: A
authors.initials: A
authors.lastname: Vollmer
authors.forename: K
authors.initials: K
authors.lastname: Müllen
authors.forename: J P
authors.initials: JP
authors.lastname: Rabe
authors.forename: A
authors.initials: A
authors.lastname: Winkler
authors.forename: P
authors.initials: P
authors.lastname: Rudolf
authors.forename: E
authors.initials: E
authors.lastname: Zojer
authors.forename: N
authors.initials: N
authors.lastname: Koch