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 27.61: Poster
Dienstag, 24. März 2009, 18:30–21:00, P2
Comparision on the local adsorption of cyclopentene and benzene on Si(100) — •Daniel Weier1, Tobias Lühr1, Axel Beimborn1, Anja Wadewitz1, and Carsten Westphal1,2 — 1Fakultät Physik - Technische Universität Dortmund, Otto-Hahn-Str.4, D 44221 Dortmund, Germany — 2DELTA - Technische Universität Dortmund, Maria-Goeppert-Mayer-Str. 2, D 44227 Dortmund, Germany
There has been considerable interest in the behaviour of the bonding process of unsaturated hydrocarbons with semiconductor surfaces. These systems offer a potential route to optoelectronic and bioanalytical devices if functional groups are added to the base molecules. Examples of these systems are the interaction between cyclopentene and benzene on silicon. In our experiments at beamline 11 (DELTA) these structures were studied using XPS and x-ray photoelectron diffraction. The experimental data were compared to simulation calculations in order to investigate the molecules interaction with the surface. Angle-scanned photoelectron diffraction patterns were recorded within 0-358° and 0-80° for the azimuth and polar angle, respectively. The experimental patterns are compared to simulation calcualtions of both systems. It will be shown that the adsorption behaviour of cyclopentene and benzene differ from each other. Cyclopentene tends to form only one type of adsorption structure whereas benzene is forming two different structures. Our results showed a combination of the 'standard butterfly' and the 'tilted bridge' structure for benzene, but a upright standing tilted structure for the cyclopente, respectively.