Dresden 2014 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
O: Fachverband Oberflächenphysik
O 14: Organic/bio Molecules on Metal Surfaces II
O 14.10: Talk
Monday, March 31, 2014, 18:15–18:30, TRE Phy
From Benzenetrithiolate Self-Assembly to Copper-Sulfide Adlayers on Cu(111): Temperature-Induced Irreversible and Reversible Phase Transitions — Thomas Sirtl1,2, •Matthias Lischka1,2, Atena Rastgoo-Lahrood1,2, Johanna Eichhorn1,2, Thomas Strunskus3, Wolfgang M. Heckl1,2,4, and Markus Lackinger1,2,4 — 1Department of Physics, Technische Universität München, James-Franck-Str. 1, 85748 Garching — 2Center for NanoScience (CeNS), Schellingstr. 4, 80799 Munich — 3Institute for Materials Science - Multicomponent Materials, Christian-Albrechts-Universität zu Kiel, Kaiserstr. 2, 24143 Kiel — 4Deutsches Museum, Museumsinsel 1, 80538 Munich (all Germany)
Self-assembly and thermally activated surface chemistry of 1,3,5-benzenetrithiol on Cu(111) are studied under ultrahigh vacuum conditions. Low energy electron diffraction patterns acquired at room temperature and during subsequent heating reveal irreversible and reversible phase transitions between in total four different long-range ordered phases. X-ray photoelectron spectroscopy of the different phases facilitates to identify major chemical changes for the phase transitions. The structural characterization of each phase is carried out by high resolution scanning tunneling microscopy and adsorption geometries of the phenyl rings are derived from C 1s near edge x-ray absorption fine structure. Combination of the results from this array of experimental techniques leads to a consistent picture from benzene thiolate monolayer to copper sulfide superstructures and underlying processes.