Dresden 2011 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 36: Poster Session II (Metals; Nanostructures at surfaces; Surface or interface magnetism; Spin-Orbit Interaction at Surfaces; Electron and spin dynamics; Surface dynamics; Methods; Theory and computation of electronic structure)

O 36.4: Poster

Dienstag, 15. März 2011, 18:30–22:00, P4

Self-Assembled Monolayers of Dimethyldiselenide on Au(111) — •Lydia El-Kareh, Axel Beimborn, Patrick Mehring, and Carsten Westphal — Experimentelle Physik I, TU Dortmund, Otto-Hahn-Str. 4, 44221 Dortmund, Germany

Self-assembled monolayers (SAMs) attract considerable attention due to their large potential in applications such as molecular electronics, tailoring of metallic surface properties and biological sensors. In recent years many studies of sulfur based SAMs have been performed. As the Se-Au bond is stronger than the S-Au bond selenium based SAMs are very interesting. In this study the structural formation of Dimethyldiselenide (DMDSe) monolayers on a Au(111) surface was investigated by scanning tunneling microscopy. SAMs were prepared by immersing the gold substrate in ethanolic solution of DMDSe. We report on the formation of a striped DMDSe phase at the surface and its thermal evolution upon heating. After annealing at 90^∘C the striped phase disappeared due to reorganization of molecules on the surface.