Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 100: Nanostructures at surfaces: Dots, particles, clusters II
O 100.6: Talk
Thursday, March 15, 2018, 16:30–16:45, MA 141
STM investigation of cluster-molecule hybrid systems deposited on the Si(111)√3×√3 R30∘-B surface — •Tim Amrhein1, Martin Franz1, Andre Knecht2, Andrea Merli2, Carl Frederic Ußling2, Thomas Möller2, and Mario Dähne1 — 1Technische Universität Berlin, Institut für Festkörperphysik — 2Technische Universität Berlin, Institut für Optik und Atomare Physik
Porphyrin based cluster-molecule hybrid systems may find application in constructing two-dimensional cluster arrays formed on a porphyrin template as well as give rise to new materials with tailored optical or electronic properties.
Here the cluster-molecule hybrid system Cu3(Cu(OEP)) was prepared by combining Cu(II)Octaethylporphyrin with Cu3+-clusters in the gas phase, followed by a characterisation using mass spectroscopy and optical excitation. For further investigations of the atomic structure and electronic properties using STM, they were deposited onto a Si(111)√3×√3 R30∘-B surface, which was used because of its unique property of being passivated and semiconducting at the same time. To acquire the soft landing regime it was necessary to alter the kinetic energy of the positivly charged hybrids by applying an adjustable electric field. For the transport from the hybrid source to the STM a newly commissioned portable UHV-suitcase was used to preserve the UHV-conditions. First STM results of structures found on the surface will be presented.
This work was supported by the DFG through FOR 1282 projects D and G.