Dresden 2014 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.77: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

The interaction of benzaldehyde with water-saturated Si(001) — •Sebastian Frey, Daniel Laumann und Ulrich Köhler — Ruhr-Universität , Bochum, NRW

In the last years the interaction between organic compounds and silicon got importance regarding the connection of organic and inorganic conductors in semiconductor technology. Particular interest lies on molecules containing conjugated π-electrons, since they often act as organic (semi-)conductors. The adsorption of Benzaldehyde (BAH) on Si(100)-2x1 surfaces can be used as a model system to understand the interaction of aromatic species with semiconductor surfaces. In technology the Si dimers are mostly saturated with O adatoms or OH-groups due to contact with water molecules. We investigated the bonding between BAH and such dimers with HR-EELS to further understand the adsorption mechanism and to clarify the role of H- and OH-terminated Si. Water, deuterium, hydrogen and hydroxil saturated and unsaturated Si was exposed to normal and deuterium labeled BAH to check whether the H adatom or the OH group is involved in the adsorption process.