Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 163 for “"powder X-ray diffraction"”.
-
Powder x-ray diffraction studies of laboratory, industrial, and natural hydrate systems
Includes bibliographical references (pages 74-77).
-
Structural studies on Functional Materials using Solid-State NMR, Powder X-ray Diffraction and DFT Calculations
Analytical and theoretical techniques were used in this work for structural studies of framework materials. One and two dimensional 31P and 17O solid state NMR experiments highlight subtle thermally induced structural changes in (MoO2)2P2O7 pyrophosphate, tungsten trioxide WO3 and negative thermal …
-
Development of Multivariate Powder X-ray Diffraction Techniques and Total Scattering Analyses to Enable Informatic Calibration of Solid Dispersion Potential
… In the first few chapters, advanced powder X-ray diffraction data processing techniques are explored and adapted to composite pharmaceutical systems. Specific emphasis will be placed ontotal scattering data manipulations and their benefits over traditional practices. The concluding …
-
A study of lithium/cobalt oxide electrochemical cells
… KCl/cobalt oxide cells was investigated. Powder X-ray diffraction techniques were used for the qualitative analysis of the phases generated during charge and discharge of the cells.
-
High throughput optical materials
… All materials were characterised using powder x-ray diffraction.<br/>The thermal conversion of zeolite A and sodium chloride into sodalite has been studied using combined TGA and DTA analysis and time resolved powder neutron diffraction heating up to 800°C. It was found that the thermal …
-
Synthesis and structural characterization of ZnTe/ZnSe core/shell tunable quantum dots
… electron microscopy, wavelength dispersive X-ray spectroscopy, powder x-ray diffraction are employed to give evidence for the core/shell structure. Absorption, and photoluminescence spectra demonstrate the tunability of this ZnTe/ZnSe core/shell system, and fluorescence lifetime decays suggest …
-
Co-crystallisation of α,ω-dicarboxylic acids with nicotinamide and isonicotinamide
… materials characterised using NMR, FTIR, powder X-ray diffraction data (PXRD) and single X-ray diffraction data (SXRD). For azelaic acid : nicotinamide (1:1), structure solution was carried out using powder X-ray diffraction data and the direct space methods are applied through …
-
Design, Synthesis, and Characterisation of Metal–Organic Framework Crystal–Glass Composites (MOF CGCs)
… MOFs are synthesised as microcrystalline powders of nanometer- to millimetre-sized particles ill-suited to industrial settings without prior processing. However, recent research has revealed solid-liquid transitions within the family, which is used here to create a class of functional, …
-
Structural aspects of pressure- and temperature-induced phase transitions in low-dimensional systems
… cells by means of single-crystal synchrotron X-ray diffraction and by complementary techniques including Raman and Mossbauer spectroscopies and powder X-ray diffraction. The results reveal a plethora of high-pressure phase transitions in MOCl. A structural analysis allowed to associate the …
-
I. An oxygen-17 NMR study on oxygen exchange in yttrium barium(2) copper(3) oxygen(7-x). II. Synthesis of transition metal polysulfide complexes from metal powders
… out using a specially designed glass apparatus. Powder X-ray diffraction and magnetic susceptibility measurements showed that our samples were highly pure. $\sp{17}$O NMR spectroscopy showed that we were able to prepare samples which have uniform and non-uniform distribution of $\sp{17}$O atoms.
-
Ionothermal Synthesis of High Silica Zeolites in Deep Eutectic Solvents (DES)
… ZSM-39 in TMACl/1, 6-hexanediol was studied by powder X-ray diffraction, NMR spectroscopy, and SEM. Amorphous silica first arrange themselves around the TMA+ and then reorganize to form the larger cages. The larger cages are joined together as the smaller cages are formed, trapping the F- in the …
-
Bismuto sulfido nanodalelių sintezė ir tyrimas /
… The products were characterized by powder X-ray diffraction(XRD), scanning electron microscopy(SEM). Bismuth citrate, which is known to be a linear polymer, may play a critical role as a precursor and a template for the growth of linear Bi2S3 nanorods. These nanorods could be applied …
-
Investigating Microbial Trace-fossils and Abiotic Alteration in Hydrovolcanic Tuffs of the Fort Rock Volcanic Field, Oregon
… include petrographic microscopy, micro and powder X-ray diffraction, SEM/BSE/EDF imaging, energy dispersive spectroscopy, stable isotopes, and X-ray fluorescence. Petrographic analysis revealed granular and tubular textures with biogenic morphologies that include terminal enlargements, …
-
Synthesis and shape control of functionalized cadmium telluride nanoparticles
… fourier transform infrared spectroscopy, powder X-ray diffraction, transmission electron microscopy and high resolution transmission electron microscopy techniques were used to confirm the quality of the as-synthesized nanoparticles. All measurements were performed without any post …
-
Thermal Analysis of Binding of Organic Pollutants to Titanium Dioxide
… reaction is endothermic or exothermic. Powder X-ray diffraction was performed on all four classes of compounds to observe diffraction pattern of these compounds.</p>
-
Preparation of amorphous forms to increase the solubility of poorly soluble drugs using spray drying
<p>Spray drying is widely used in enhancing the aqueous solubility of poorly soluble compounds. In this study, the mechanism of solubility enhancement was characterized using three model drugs-naproxen, ketoprofen and furosemide. Physical mixtures of the model drug with polyvinylpyrrolidine and …
-
Novel Synthesis and Characterization of Uranium-Zirconium Carbonitride by Direct Casting
… solidification. Additional energy dispersive x-ray spectroscopy, combustion analysis, and inert gas fusion analysis proved that the core regions have both uranium and zirconium and establish that carbon and nitrogen are retained during the fabrication process. Powder x-ray diffraction analysis …
-
An Electrochemical Study of the Oxidative Dissolution of Synthetic Nickel-Iron Sulphide Minerals in Aqueous Media
… were analysed by reflected light microscopy, powder X-ray diffraction and electron microprobe analysis. The synthetic pentlandite was found to have an average stoichiometry of Fe4.35Ni4.65S8. A partial phase segregation of pentlandite into heazlewoodite and pyrrhotite was observed. The …
-
High-throughput synthesis and characterization of vanadium mixed metal oxide pigments using synchroton radiation
… and band gap energies using powder X-ray diffraction (PXD), synchrotron-based<br/>X-ray absorption fine structure (XAFS) spectroscopy, solid state UV-Visible and Raman<br/>spectroscopy, Scanning and Transmission electron microscopy (SEM and TEM).<br/><br/>Vanadium mixed metal …
Page 1 of 9