Regensburg 2016 – scientific programme
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O: Fachverband Oberflächenphysik
O 34: Nanostructures at Surfaces II
O 34.7: Talk
Tuesday, March 8, 2016, 12:00–12:15, H6
A comparative study of two perylene derivatives on Cu(111): insight into the bonding mechanism — •Mihaela Enache1, Manfred Matena2, Jonas Björk3, Jorge Lobo-Checa4, Thomas Jung2, Mats Persson5, and Lutz Gade6 — 1University of Groningen, Groningen, Netherlands — 2University of Basel, Basel, Switzerland — 3University of Linköping, Linköping, Sweden — 4Centro de Física de Materiales (CSIC-UPV-EHU), San Sebastian, Spain — 5University of Liverpool, Liverpool, UK — 6Universität Heidelberg, Heidelberg, Germany
Herein, an experimental and theoretical characterization of the adsorption of two perylene derivatives on Cu(111) is presented [1, 2]. The main focus of this work lies on the analysis of molecule-molecule and molecule-substrate interactions by combining results from scanning tunneling microscopy, x-ray photoelectron spectroscopy, x-ray standing wave (XSW) measurements, and density functional theory.
For submonolayer coverage and after annealing (>150°C), both systems form a metal-coordinated network, which is commensurate to the substrate. By performing XSW measurements, the vertical adsorption geometry was determined and thereby, insight into the interplay between intermolecular and molecule-substrate interactions was gained. As a result of the metal coordination, the molecule-substrate interactions are decreased and the molecules are essentially decoupled from the Cu(111) surface.
[1] M. Matena et al., Phys. Rev. B, 90, 125408 (2014)
[2] M. Matena et al., Chem. Eur. J., 16, 2079 (2010)