Regensburg 2019 – wissenschaftliches Programm
O 71.1: Poster
Mittwoch, 3. April 2019, 17:45–20:00, Poster B2
Synthesis on surfaces: direct desulfurization and hyperthermal reactions of Reichardt's dye — •Tomasz Michnowicz1, Bogdana Borca1,2, Rémi Pétuya3, Marcel Pristl1, Ulrike Kraft1, Hagen Klauk1, Pavel Jelinek4, Andres Arnau3, Uta Schlickum1,5, Lukas Krumbein1, Suman Sen1, Martina Stella6, Andrea Floris6, Allesandro de'Vita6, Stephan Rauschenbach1,7, and Klaus Kern1,8 — 1Max Planck Institute for Solid State Research, Germany — 2National Institute of Materials Physics, Romania — 3UPV/EHU San Sebastian, Spain — 4Insitute of Physics CAS, Czech Republic — 5TU Braunschweig, Germany — 6King's College, UK — 7University of Oxford, UK — 8École Polytechnique Fédérale de Lausanne, Switzerland
We present combined STM/AFM studies of molecular structures acquired via two different approaches to on-surface chemical reactions: local, precise control of a desulfurization process and a kinetically induced reaction of Reichardt's dye. The first reaction is driven by the local electric field present in the STM tip-sample junction. We demonstrate the subsequent dissociation of both carbon - sulfur bonds of a thiophene group embedded in tetracenothiophene (TCT) molecules on Cu(111). For the second system we utilize the Electrospray Ion Beam Deposition (ES-IBD) to collide single molecular ions of Reichahrdt's dye with a Cu(100) surface at energies in the hyperthermal regime. With this technique, new species of Reichhardt's dye can be obtained (e.g. including ruptured benzene rings), inaccessible by means of a standard thermal activation path.