Dresden 2014 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 55: Focussed Session: Towards a Quantitative Understanding of Complex Adsorption Structures: Surface Science goes Organic I
O 55.7: Vortrag
Mittwoch, 2. April 2014, 18:00–18:15, TRE Phy
Photoelectron diffraction and the organic / inorganic interface — •David A Duncan1, Dagmar Kreikemeyer Lorenzo2, Werner Unterberger2, Francesco Allegretti1, Johannes V Barth1, and D Phil Woodruff3 — 1Technische Universität München — 2Fritz-Haber Institut, Berlin — 3University of Warwick, UK
While, there is a growing interest into investigations of biologically-related molecules on surfaces, motivated in part by issues concerned with bio-compatibility and biochemical sensors, very few studies involve quantitative determination of the local adsorption geometries. The technique of scanned-energy mode photoelectron diffraction (PhD) is particularly well-suited to this problem as it allows not only elemental, but chemical state specific local adsorption sites to be determined. Specifically PhD has been utilised to study the building blocks of biological molecules, notably amino acids and nucleobases.
The local adsorption site of the functional groups within these biologically inspired molecules, follows mostly the same pattern as much simpler molecules containing the same groups, retaining mostly the same level of coordination with the substrate, and very similar bond lengths - despite increasing molecular complexity.