title: Nanoconfinement effects in the self-assembly of diindenoperylene (DIP) on Cu(111) surfaces.
abstract: The structure of monolayer films of diindenoperylene (DIP) on Cu(111) single crystals has been studied by means of scanning tunneling microscopy (STM). Pronounced film confinement effects are observed, resulting in distinctly different film structures depending upon the substrate terrace width. On wide terraces (exceeding approximately 15 nm in width) a short range ordered structure forms with the DIP molecules aligned along three discrete directions related by 60 degrees rotations. On the contrary, on narrow terraces (<15 nm), the confinement enhances the role of the step edges and leads to the formation of a long range ordered structure with co-directionally oriented molecules, tentatively ascribed to an energy minimization by optimization of the surface coverage.
authors.affiliation: Donostia International Physics Center, Paseo Manuel Lardizabal 4, 20018 San Sebastián, Spain. d_g_oteyza@ehu.es
authors.forename: Dimas G
authors.initials: DG
authors.lastname: de Oteyza
authors.forename: Esther
authors.initials: E
authors.lastname: Barrena
authors.forename: Helmut
authors.initials: H
authors.lastname: Dosch
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Wakayama
mesh_terms: D003300:Copper / Q000737:chemistry*; D007192:Indenes / Q000737:chemistry*; D008567:Membranes, Artificial; D016252:Microscopy, Scanning Tunneling; D049329:Nanostructures / Q000737:chemistry*; D010316:Particle Size; D010569:Perylene / Q000031:analogs & derivatives* / Q000737:chemistry; D013499:Surface Properties
chemical_list: D007192:Indenes; D008567:Membranes, Artificial; C542458:diindenoperylene; D010569:Perylene; D003300:Copper