Dresden 2017 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 51: Nanostructures at Surfaces: 1D and 2D Structures and Networks
O 51.11: Poster
Dienstag, 21. März 2017, 18:30–20:30, P1C
Self-assembly of MoMo-Methyl molecules on Au surfaces — •Lu Lyu1, Zheng Wei1,2, Jobynson Kollamana1, Manuel Zimmer3, Markus Gerhards3, Benjamin Stadtmüller1, Mirko Cinchetti4, and Martin Aeschlimann1 — 1Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Erwin-Schrödinger-Straße 46, 67663 Kaiserslautern, Germany — 2College of Material Science and Engineering, Chongqing University, 400044 Chongqing, People's Republic of China — 3Department of Chemistry, University of Kaiserslautern, Erwin-Schrödinger-Straße 52, 67663 Kaiserslautern, Germany — 4Experimentelle Physik VI, Technische Universität Dortmund, 44221 Dortmund, Germany
We systematically investigated the self-assembly and ordering of MoMo-Methyl (3M) molecules on Au(111) and Au(788) surfaces with variable-temperature scanning tunneling microscopy (STM) at substrate temperature of 106 K. On Au(111), most of the molecules form two-dimensional ordered superstructures preserving the herringbone reconstruction of the substrate. In addition, one-dimensional zig-zag molecular chains were observed, in contrast to the straight chains that we previously studied for 3M grown on Cu(111) On the vicinal Au(788), two types of one-dimensional (1D) molecular chains were observed. On more narrow terraces, 2D-like molecular ribbons are formed. These differences indicate that the coordination of Au substrate atoms with 3M molecules can be ignored on Au(111) but not on Au(788).