Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 97: Organic/bio Molecules on Metal Surfaces IV
O 97.7: Vortrag
Freitag, 4. April 2014, 12:00–12:15, TRE Phy
Subphthalocyanine based nanocrystals — •Marta Trelka1,2, Anaïs Medina3, David Écija2, Christian Urban2, Oliver Gröning4, Roman Fasel4, José Gallego5, Christian Claessens3, Roberto Otero2,6, Tomás Torres3,6, and Rodolfo Miranda2,6 — 1University of Bielefeld, 33615 Bielefeld, Germany — 2Universidad Autónoma de Madrid, 28049 Madrid, Spain — 3Universidad Autónoma de Madrid, 28049 Madrid, Spain — 4Empa Swiss Federal Laboratories for Materials Testing and Research, 3602 Thun, 8600 Dübendorf, Switzerland — 5Instituto de Ciencia de Materiales de Madrid, 28049 Madrid, Spain — 6Instituto Madrileño de Estudios Avanzados en Nanociencia, 28049 Madrid, Spain
We will present Scanning Tunneling Microscopy studies on Subphthalocyanie (SubPc) molecules that lead to the formation of 3D nanocrystals on a Cu(111) surface. Subphthalocyanine molecules are significantly large macrocycle aromatic structures with a boron atom in the center. Strong molecule-molecule interactions can be expected due to the high dipole moment along the boron-ligand axis. For molecules with a chlorine atom linked to the boron axis, the formation of the organic nanocrystals is found to increase the coverage of sublimated molecules on the surface. The nanocrystals grow up to third layer creating trimers imaged as a bright protrusion. In the studies, the importance of the dipole moment for the growth process is presented. Taking into account the obtained data it is concluded that organic molecules can lead to growth at a metal surface into nanocrystals.[1]
[1] SubPc based nanocrystals Chem. Comm. (2011) 47,9986-9988