title: Cu-adatom-mediated bonding in close-packed benzoate/Cu(110)-systems.
abstract: Using UHV-STM investigations and density-functional theory calculations we prove the contribution of Cu-adatoms to the stabilization of a new high-density phase of benzoate molecules on a Cu(110) substrate. We show that two different chemical species, benzoate and benzoate Cu-adatoms molecules, build the new close-packed structure. Although both species bind strongly to the copper surface, we identify the benzoate Cu-adatoms molecules as the more mobile species on the surface due to their reduced dipole moment and their lower binding energy compared to benzoate molecules. Therefore, the self-assembly process is supposed to be mediated by benzoate Cu-adatom species, which is analogous to the gold-thiolate species on Au(111) surfaces.
authors.affiliation: Institute for Solid State Research and JARA-FIT, Forschungszentrum Jülich GmbH, 52428 Jülich, Germany.
authors.forename: M Christina
authors.initials: MC
authors.lastname: Lennartz
authors.forename: Nicolae
authors.initials: N
authors.lastname: Atodiresei
authors.forename: Lars
authors.initials: L
authors.lastname: Muller-Meskamp
authors.forename: Silvia
authors.initials: S
authors.lastname: Karthauser
authors.forename: Rainer
authors.initials: R
authors.lastname: Waser
authors.forename: Stefan
authors.initials: S
authors.lastname: Blugel
mesh_terms: D001565:Benzoates / Q000737:chemistry*; D003198:Computer Simulation; D003300:Copper / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling; D008956:Models, Chemical; D010316:Particle Size; D013499:Surface Properties
chemical_list: D001565:Benzoates; D003300:Copper