title: Electron spectroscopy study of the initial stages of iron phthalocyanine growth on highly oriented pyrolitic graphite.
abstract: The nature of the intermolecular and substrate bonds of iron phthalocyanine adsorbed on highly oriented pyrolitic graphite has been investigated by x-ray photoelectron spectroscopy and x-ray absorption spectroscopy. We find that the molecules grow in a highly ordered fashion with the molecules essentially plane-parallel to the surface in both the mono- and multilayers. The spectra obtained on both types of film are virtually identical, which shows that the bonds both between the adsorbate and substrate and between the molecular layers have a pure van der Waals nature. Supporting density functional theory results indicate that the layers are stabilized by weak hydrogen bonds within the molecular layers.
authors.affiliation: Department of Physics, Division of Synchrotron Radiation Research, Lund University, Box 118, Lund 221 00, Sweden.
authors.forename: Cristina
authors.initials: C
authors.lastname: Isvoranu
authors.forename: John
authors.initials: J
authors.lastname: Ahlund
authors.forename: Bin
authors.initials: B
authors.lastname: Wang
authors.forename: Evren
authors.initials: E
authors.lastname: Ataman
authors.forename: Nils
authors.initials: N
authors.lastname: Mårtensson
authors.forename: Carla
authors.initials: C
authors.lastname: Puglia
authors.forename: Jesper N
authors.initials: JN
authors.lastname: Andersen
authors.forename: Marie-Laure
authors.initials: ML
authors.lastname: Bocquet
authors.forename: Joachim
authors.initials: J
authors.lastname: Schnadt