Master Theses

Magnetische Nanopartikel (MNPs) zeigen ausgeprägte größenabhängige magnetischeEigenschaften und strukturelle Anordnungen, die stark vom umgebenden Mediumbeeinflusst werden. Unter ihnen sind FeOx-Nanopartikel besonders interessant aufgrundihrer hohen chemischen Stabilität und anpassbaren magnetischen Eigenschaften,was sie zu vielversprechenden Kandidaten für Anwendungen von der magnetischenSensorik bis hin zur biomedizinischen Bildgebung und Nanorheologie macht. [...]

High-pressure clamp cells for neutron diffraction experiments require specialized construction materials that do not attenuate neutrons, are not activated, are non-magnetic and can withstand high pressures. Previous research found two commercially available materials, Nickel-Chromium-Aluminium Alloy (NiCrAl) and Copper-Beryllium Alloy (CuBe2), for a compound cylinder clamped-cell designed for a maximum working pressure of 2.3 GPa. [...]

The removal of minor actinides (MAs) from nuclear waste - in particular the separation of Am(III) from lanthanide (Ln) fission products - is an important step in the partitioning and transmutation (P&T) strategy aimed at reducing long-term heat load and radiotoxicity. In this study, a newly synthesized DGA ligand, 2-(2-[didecyl]-2-oxoethoxy)-N,N-didecylpropanamide (Me-TDDGA), was evaluated for its extraction performance and selectivity towards tri- and tetravalent actinides and trivalent lanthanides under different experimental conditions. [...]

This thesis investigates the magnetic and structural properties of two batches of single crystals (freshly synthesized and aged) and polycrystalline material of the spin-crossover (SCO) compound [Fe(NQu3)(NCS)2]∙0.5 Et2O (Qu = quinoline and Et = ethyl). Magnetization measurements, carried out on in-house Superconducting Quantum Interference Device (SQUID) and on freshly synthesized single crystals, indicate that the compound exhibits abrupt SCO behaviour with a hysteresis width of 24.47 K. [...]