Dresden 2009 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 27: Poster Session I (Methods: Scanning probe techniques; Methods: Atomic and electronic structure; Methods: Molecular simulations and statistical mechanics; Oxides and Insulators: Clean surfaces; Oxides and Insulators: Adsorption; Oxides and Insulators: Epitaxy and growth; Semiconductor substrates: Clean surfaces; Semiconductor substrates: Epitaxy and growth; Semiconductor substrates: Adsorption; Nano- optics of metallic and semiconducting nanostructures; Electronic structure; Methods: Electronic structure theory; Methods: other (experimental); Methods: other (theory); Solutions on surfaces; Epitaxial Graphene; Surface oder interface magnetism; Phase transitions; Time-resolved spectroscopies)

O 27.64: Poster

Dienstag, 24. März 2009, 18:30–21:00, P2

HR-EELS and STM study of organic molecules on Si(001) — •Bochra Boughaled Ellakhmissi and Ulrich Köhler — Experimentalphysik IV/AG Oberflächen, Ruhr-Universität Bochum, 44780 Bochum, Germany

The reaction of acrylonitrile with Si(001)-(2x1)-surfaces is studied as a first step in the field of the fabrication of organic/inorganic semiconductor hybrid structures. Layers of nitriles are a possible candidate for a template layer on silicon to enable the anchoring of organic coatings.

A combination of an area averaging spectroscopy, high resolution electron energy loss spectroscopy (HR-EELS) and a local microscopy, scanning tunnelling microscopy (STM) is used to determine the internal structure of the adsorbed molecule and the adsorption geometry on the Si-substrate. A non-dissociative cross dimer row adsorption is present at room temperature and below. HR-EELS is used to study the thermal decomposition of acrylonitrile above room temperature. First results on the reaction of organic molecules with water covered Si(001) surfaces will be shown.