Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 45: Organic-Inorganic Hybrid Systems and Organic Films
O 45.6: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1A
Ordered superstructures of a molecular electron donor on Au(111) — •Alexander Mehler1, Tino Kirchhübel2, Nicolas Néel1, Roman Forker2, Torsten Fritz2, and Jörg Kröger1 — 1Institut für Physik, Technische Universität Ilmenau, D-98693 Ilmenau, Germany — 2Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, D-07743 Jena, Germany
The molecular donor tetraphenyldibenzoperianthene (DBP) exhibits coverage-dependent superstructures on Au(111). At submonolayer coverages the molecules align parallel to each other. They arrange in row-like structures, which exhibit a nearly rectangular primitive unit cell. The closed molecular monolayer is characterized by a herringbone-type DBP arrangement spanned by an almost square unit cell containing two molecules. Both superstuctures simultaneously occur in a narrow coverage range close to completion of the molecular monolayer. Structural properties were consistently probed in real and reciprocal space by scanning tunnelling microscopy and low-energy electron diffraction, respectively.