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 36.8: Poster

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

Structural formation of thiophene-2-thiol on gold — Lydia El-Kareh¹, •Axel Beimborn¹, Patrick Mehring¹, Dominique Handschak¹, and Carsten Westphal^1,2 — ¹Experimentelle Physik 1 - TU Dortmund, Otto-Hahn-Str.4, D 44221 Dortmund, Germany — ²DELTA -TU Dortmund, Maria-Goeppert-Mayer-Str. 2, D 44227 Dortmund, Germany

In recent years self assembled monolayers (SAMs) have been extensively studied because of their well-defined structures resulting from simple dipping preparation. An ideal system for the understanding of self-organisation processes are alcanethiols that were widely examined during the last decades. These molecules can be prepared with different head groups leading to different applications in molecular electronics, nanotechnology, bio-sensing, and corrosion inhibition. One possible head group is thiophene. The orientation of thiophene-2-thiol adsorbed on Au(111) has been investigated by scanning tunneling microscopy (STM). Thiophene-2-thiol molecules are found forming highly ordered adlayers. High-resolution STM reveals well ordered molecular stripes of different length. On the golf surface the stripes arrange displaced with respect to the substrate lattice forming a two-dimensional molecular network.