Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 14: Organic-inorganic hybrid systems and organic films II
O 14.2: Vortrag
Montag, 12. März 2018, 15:30–15:45, MA 042
Electrospray deposition of P3HT on Au(110): An STM study — •Theresa Simon1, Erik Schreck1, Stefan Förster1, and Wolf Widdra1,2 — 1Institute of Physics, Martin-Luther-Universität Halle-Wittenberg, Halle, Germany — 2Max Planck Institut für Mikrostrukturphysik, Halle, Germany
In the course of characterizing the structure of polymers in contact with solid surfaces, the adsorption of Poly(3-hexylthiophene) (P3HT) on Au(001) [1] leads to a 2D random coil like chain configuration but also molecules in straight all-trans geometry are found.
Here we present the investigation of P3HT on the (2 x 1)-missing-row reconstructed Au(110) surface, which provides a stronger 1D template for polymere adsorption. In situ scanning tunneling microscopy reveals molecular P3HT chains which are constraint into a fully stretched configuration along the [110] and [001] high symmetry directions indicating a strong molecule-substrate interaction. Chains parallel to the [110] direction are embedded into the surface by the removal of one or two Au reconstruction rows. Beside these straight polymer sections also polymers aligned in the [001] direction or under discrete angles with respect to the surface reconstruction are present together with a minority in random coil configuration.
[1] Förster et al., JCP 141(2014)054713