Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 22: Nanostructures at Surfaces II
O 22.1: Vortrag
Montag, 11. März 2013, 16:00–16:15, H45
Self-assembly of Fe cluster superlattice in metal-organic network — Marina Pivetta1, •Giulia E. Pacchioni1, Uta Schlickum1,2, Johannes V. Barth3, and Harald Brune1 — 1Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland — 2Max-Planck-Institut für Festkörperforschung, D-70569 Stuttgart, Germany — 3Physik Department E20, Technische Universität München, D-85748 Garching, Germany
We studied the self-assembly of Fe clusters and adatoms in a metal-organic honeycomb network on Cu(111) by means of low-temperature scanning tunneling microscopy. The network is formed by coordination of dicarbonitrile pentaphenyl molecules to Cu adatoms. Fe atoms landing on the metal surface are mobile and are steerd by the quantum confinement of the surface state electrons towards the center of the network hexagonal cavities. In cavities with more than one Fe atom, preferential interatomic distances are observed. Upon gentle annealing the adatoms in each hexagon aggregate into a single cluster. These clusters are again centered in the cavities and their size is discerned by their distinct apparent heights.