Regensburg 2013 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 42: Organic/bio Molecules on Metal Surfaces IV
O 42.1: Vortrag
Mittwoch, 13. März 2013, 10:30–10:45, H38
Modification of Cu(111) with buckybowls — •Quirin S. Stöckl1, Tobias Bauert1, Davide Bandera2, Manfred Parschau1, Jay S. Siegel2, and Karl-Heinz Ernst1,2 — 1Empa, Nanoscale Material Science, Dübendorf, Switzerland — 2Organisch-chemisches Institut, Universität Zürich, Switzerland
Interesting candidates for surface modifications for organic photovoltaics or controlled carbon nanotube growth are buckybowls, geodesic polyarenes and quasi-fragments of C60. Corannulene (COR, C20H10) is the simplest curved fragment with a central pentagonal ring, surrounded by five aromatic C6 rings. Fivefold symmetry is incompatible with the translational order in all 17 plane groups, and this system is therefore of fundamental interest for 2D self-assembly. We have studied therefore the self-assembly of the star-like pentaphenyl-corannulene (Ph5Cor) with STM. The packing motifs basically consist of anti-parallel rows with interdigitated substituents. Results will be compared to structures found for other penta-substituted COR derivatives and for monoindeno-corannulene.