Berlin 2018 – scientific programme
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O: Fachverband Oberflächenphysik
O 11: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures I
O 11.8: Talk
Monday, March 12, 2018, 17:15–17:30, MA 004
A novel surface-catalytic reaction studied by scanning probe microscopy — •Lacheng Liu1,2, Hong-Ying Gao1,2, Henning Klaasen3, Alexander Timmer1,2, Harry Mönig1,2, Armido Studer3, and Harald Fuchs1,2 — 1Center for Nanotechnology, Heisenbergstraße 11, 48149 Münster, Germany — 2Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Wilhelm-Klemm-Straße 10, 48149 Münster, Germany — 3Organisch-Chemisches Institut and Center for Mutiscale Theory and Simulation, Westfälische Wilhelms-Universität Münster, Corrensstraße 40, 48149 Münster, Germany
On-surface synthesis is a promising surface-assisted approach to form novel functional nanostructures via covalent interaction between organic molecules. In this work, we report a novel surface-catalytic reaction on Au(111), Cu(111) and Ag(111) surfaces with the same organic molecule as precursors. The scanning tunneling microscopy (STM) imaging study shows that two different 1D covalent polymers will be formed on metal surfaces via two steps of thermal annealing, respectively. The polymerization occurs at lower thermal annealing temperature on Cu(111) than that of on Au(111) and Ag(111). To understand the pass way of the reaction on metal surfaces, non-contact atomic force microscopy (nc-AFM) and X-ray photoelectron spectroscopy (XPS) measurements were performed combined with DFT calculation. The novel reaction provides a promising way to synthesis 1D polymers on metal surfaces.