SKM 2023 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 81: Oxide and Insulator Surfaces I: Adsorption and Reaction of Small Molecules
O 81.11: Vortrag
Donnerstag, 30. März 2023, 17:30–17:45, CHE 91
Interaction and structural behavior of thymidine on polycrystalline cerium oxide films — •Sascha Mehl1, Anastasiia Deineko2, Viacheslav Kalinovych2, Tomáš Skála2, Iva Matolinová2, Vladimír Matolín2, Kevin C. Prince1, and Nataliya Tsud2 — 1Elettra-Sincrotrone Trieste S.C.p.A., in Area Science Park, Strada Statale 14, km 163.5, Basovizza (Trieste), 34149, Italy — 2Charles University, Faculty of Mathematics and Physics, Department of Surface and Plasma Science, V Holešovičkách 2, Prague, 18000, Czech Republic
Thymidine (dT) is a nucleoside and therefore important for the contribution to in-depth studies of cerium oxide as a potential sensing material applicable for analytes such as DNA. This topic contributes to a survey which embraces from simple nucleobases to more complex DNA components as probe molecules on a wide array of different CeO2 films. Consequently, bridging the material gap and deposition of dT from aqueous solution on compact CeO2 allows us to get closer towards more realistic conditions. The goals of the present study were the elucidation of the electronic structure of the biomolecule-cerium oxide interface, as well as the adsorption geometry and thermal stability of the nucleoside. Adsorption studies were carried out by using SRPES, RPES and NEXAFS techniques. A noteworthy result was the successful deposition of dT from solution and in gas phase without decomposition, which was never previously reported in the literature. The analysis of the experimental data revealed that dT molecules anchor on CeO2 film via two carbonyl oxygen atoms and an amino group.