Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 52: Organic/bio Molecules on Metal Surfaces V
O 52.7: Vortrag
Mittwoch, 13. März 2013, 17:30–17:45, H38
Self-assembly of a threefold symmetric CN-terminated molecular linker on Cu(111) and Ag(111) — •Peter B. Weber1, Yiqi Zhang1, Florian Klappenberger1, Svetlana Klyatskaya2, Mario Ruben2,3, and Johannes Barth1 — 1Physik Department E20, Technische Universität München, Garching 85748, Germany — 2Institute of Nanotechnology, Karlsruhe Institute of Technology — 3Institut de Physique et Chimie des Matériaux de Strasbourg, Université de Strasbourg
We present a scanning tunneling microscopy study of the self-assembly of 1,3,5-tri(4-cyanophenyl)-benzene (TCB) on the Cu(111)-surface and on the Ag(111)-surface. The measurements were carried out under ultra-high-vacuum conditions at 5.5 K. On both surfaces the formation of large regular networks was observed. The molecules are arranged in a hexagonal lattice and the islands are stabilized by multiple proton acceptor ring interactions [1]. This behavior contrasts that for linear NC-Phx-CN species where multiple nanoporous networks were formed partially involving dipolar interactions [2]. The formed networks are commensurable with the Cu(111)-surface but not with the Ag(111)-surface. In a second step we demonstrate the usefulness of these islands to steer the positioning of Co-atoms resulting in a high yield of Co-phenyl half-sandwich compounds with potentially interesting magnetic properties.
[1] Arras, E. et al, Phys. Chem. Chem. Phys. 14, 15995 (2012) [2] Kühne, D. et al, J. Phys. Chem. C 113, 17851 (2009)