Regensburg 2007 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 44: Poster Session II (Semiconductors; Oxides and Insulators: Adsorption, Clean Surfaces, Epitaxy and Growth; Surface Chemical Reactions and Heterogeneous Catalysis; Surface or Interface Magnetism; Solid-Liquid Interfaces; Organic, Polymeric, Biomolecular Films; Particles and Clusters; Methods: Atomic and Electronic Structure; Time-resolved Spectroscopies)
O 44.8: Poster
Mittwoch, 28. März 2007, 17:00–19:30, Poster C
Looking for optimal Parameters for the self-assembly of linear organic Thiophenes — •Frank Sperka1, Othmar Marti1, and Elena Mena-Osteritz2 — 1Ulm University, Institute of Experimental Physics — 2Ulm University, Institute of Organic Cemistry II
Macrocyclic Thiophenes are interesting substances to produce organic semiconductors. The self-assembly-behaviour of various types of macrocycles Cycloterthiophene-diine was studied in the last few years by means of STM. In order to gain a deeper inside into these mechanisms on also has to investigate how the assembly of linear Thiophene-Molecules on a substrate works. In order to do this, we investigated the R,R- and S,S-type of linear molecule Dihexyl-EDOT (EDOT=EthylenDioyThiophene) on mica and grahpite with an AFM in tapping mode. At the beginning it was found that our measurements were inconsistent. In this poster we will describe the influences of several environmental parameters like temperature, humidity and time on the quality of the films. Additionally it was found that the films degrade quite rapidly after formation.