Browsing Naturwissenschaften, Mathematik und Informatik by Referee "Eckold, Götz Prof. Dr."
Now showing items 1-17 of 17
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Theoretical high-resolution spectroscopy for reactive molecules in astrochemistry and combustion processes
(2019-12-19)Rovibrational spectroscopy is a prime tool for the indirect investigation of molecular potential energy surfaces (PES). Naturally, theoretical predictions of molecular spectra have been the focus of numerous works since ... -
Novel type of neutron polarization analysis using the multianalyser at PUMA implementation, characterization and first experiments
(2019-11-07)The PUMA polarization analysis introduces a new method for polarization analysis with neutrons, for the first time allowing the simultaneous measurement of both spin states by detecting spin-up and spin-down neutrons in ... -
Investigation of the Structure and Dynamics of Multiferroic Systems by Inelastic Neutron Scattering and Complementary Methods
(2019-02-22)The aim of this thesis is the characterization of three different multiferroic materials. The first substance is MnWO4 whose magnetic phase transition temperatures can be increased when tungsten atoms are substituted by ... -
Conformational spectroscopy of flexible chain molecules near the folding limit
(2018-02-22)The highly competitive conformational landscapes of flexible chain molecules are a difficult challenge even for modern quantum chemistry as several delicate effects, partially counterbalancing each other, play an important ... -
Der Einfluss von Defekten auf das Schaltverhalten ferroelektrisch modulierter Substanzen
(2016-04-26)The influence of defects on the phase transition behavior of A2BX4-compounds was studied by diffraction methods, impedance spectroscopy and atomic force microscopy. It was found that chemical point defects have a strong ... -
Konkurrierende ferroische Ordnungsparameter in SrTiO3: Domänenverhalten und Schaltverhalten
(2014-09-01)Strontium titanate (SrTiO3) is a well-known member of the perovskite family. It exhibits an antiferrodistortive phase transition at 105 K leading to a tetragonal paraelectric phase with three different structural domains. At ... -
Wetting heterogeneities in porous media
(2014-04-28)Multiphase flow in porous media is an important process for many technical and environmental applications such as fuel cells, oil recovery, CO2 storage among others. Understanding the rules that govern these flows is ... -
Elucidation of Unconventional Bonding in Lithium Organic Compounds
(2009-08-07)The major goals of this thesis were to synthesise and crystallise novel unsubstituted picolyl metal adducts for structural analyses. Their investigation as well as other lithium organic ... -
Experimental Electron Density Determination of Unconventionally Bonded Boron
(2009-07-22)Two major aims have been pursued in the course of this thesis. On the one hand, reasons for the different reactivities of two Lewis acids based on tris(pentafluorophenyl)borane, namely ... -
Zum Einfluss der elastischen Verzerrungsenergie auf die Frühstadien der Entmischung von Cu2at.%Co
(2005-10-07)In the present work the decomposition in the Cu2at.%Co system was characterized at 703K, 763K und 853K by means of Field Ion Microscopy (FIM), Tomographic Atom Probe (TAP) and Field Ion ... -
Breitbandige Ultraschallabsorptionsspektroskopie an wässrigen Kohlenhydrat-Lösungen
(2004-07-29)This thesis investigates conformational kinetics of disaccharides in aqueous solutions. For this purpose, ultrasonic attenuation spectra of disaccharides in water have been measured in a ... -
Strukturuntersuchungen an Methan- und Kohlenstoffdioxid-Clathrat-Hydraten
(2004-04-26)Huge quantities of gas hydrates are deposited in deep-sea sediments of ocean margins, in permafrost regions and probable in extraterrestic occurrences. Gas hydrates and in particular ... -
Size-selective synthesis of nanometer-sized Palladium clusters and their hydrogen solvation behaviour
(2004-04-07)Nanometer-sized palladium clusters were prepared and studied in this work; First, different cluster sizes were prepared using an electrochemical technique. Second, the interaction of the ... -
Untersuchung der Entmischungskinetik an Silber-Natriumbromid-Einkristallen mit zeitaufgelöster inelastischer Neutronenstreuung
(2003-11-18)Time-resolved inelastic neutron scattering from acoustic phonons has been used to characterise the mechanism of demixing in AgBr-NaBr single crystals. Stroboscopic techniques allow to study ... -
Struktur und Umwandlungen von Eisphasen in Gegenwart der Gase Helium, Neon und Argon
(2003-04-14)Water in its crystalline phases is an ideal system to investigate the interactions of water molecules with each other as well as with various gases. Condensed water exists in a variety of ... -
Zeitaufgelöste inelastische Neutronenstreuung an entmischenden Silber-Natriumchlorid-Einkristallen
(2002-11-20)The kinetic of decomposition in silver sodium chloride single crystals has been studied by means of the evolution of phonon spectra. In the early stages of decomposition a spinodal ...