Search for dissertations about: "SAXS"

Showing result 1 - 5 of 67 swedish dissertations containing the word SAXS.

  1. 1. Mesoporous Silica Formed with Triblock Copolymers

    University dissertation from Department of Physical Chemistry, Lund University

    Author : Katarina Flodström; [2004]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Fysikalisk kemi; 1H NMR; TEM; SAXS; in situ; mechanism of formation; cubic Ia3d; cubic Im3m; Mesoporous; synthesis; Pluronic; SBA-16; SBA-15; hexagonal p6mm; synchrotron SAXS; Physical chemistry; amphiphilic polymers; silica;

    Abstract : The formation of highly ordered mesoporous silica materials, using PEO-PPO-PEO amphiphilic triblock copolymers (so-called Pluronics) as structure directing agents, has been studied. The materials are formed through the addition of a silica source to a polymer solution of low concentration (2.5 wt ) under acidic conditions. READ MORE

  2. 2. X-Ray Diagnostics in Combustion - Study of Particle Formation in Flames Using Combined Small- and Wide-Angle X-Ray Scattering

    University dissertation from Division of Combustion Physics, Department of Physics, Lund University

    Author : Linda Vallenhag; [2014]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nanoparticles; soot particles; WAXS; X-ray scattering; SAXS; combustion; Fysicumarkivet A:2014:Vallenhag;

    Abstract : In the thesis work, two X-ray scattering techniques, small- and wide-angle X-ray scattering (SAXS and WAXS) were combined to study particle formation in-situ and non-intrusively in ethylene laboratory flames. Combining these two techniques enabled information concerning the size and concentration as well as the subnanometer structure of the nanoparticles within the 1–100 nm range there to be obtained. READ MORE

  3. 3. Peering Beyond the Noise in Experimental Biophysical Data

    University dissertation from Stockholm : Department of Biochemistry and Biophysics, Stockholm University

    Author : Dari Kimanius; Erik Lindahl; Holger Stark; [2019]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Cryo-EM; mitochondrial ribosome; SAXS; molecular dynamics; metadynamics; biokemi med inriktning mot bioinformatik; Biochemistry towards Bioinformatics;

    Abstract : Experimental protein structure determination methods make up a fundamental part of our understanding of biological systems. Manual interpretation of the output from these methods has been made obsolete by the sheer size and complexity of the acquired data. READ MORE

  4. 4. Swelling and Microstructure of Nanoplatelet Systems

    University dissertation from Lund University, Faculty of Science, Department of Chemistry, Theoretical Chemistry

    Author : Axel Thuresson; [2017]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Nanoplatelets; Model clay system; Coarse grained models; Statistical mechanics; MC simulations; MD simulations; SAXS; Cryo-TEM; Laponite; Montmorillonite; Swelling; Tactoid;

    Abstract : Many clay minerals consist of charged nanoplatelets that swell in an aqueous solution. The swelling and the microstructure depend on the type of clay mineral but are also dependent on, for example, the ionic composition and the temperature of the solution. READ MORE

  5. 5. Salting-out of Colloidal Latex Particles Grafted with Poly(ethylene glycol)

    University dissertation from Göteborgs universitet

    Author : Kristin Jonsson; Göteborgs universitet.; Gothenburg University.; [2020]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PEG; fluorinated colloids; monodisperse spheres; steric stability; emulsion polymerization; SAXS; crosslinking; salting-out; interfacial tension; SANS;

    Abstract : Colloidal particles dispersed in a medium are important both in nature and in industry. The stability of colloidal particles is determined by the interactions between them and can be improved by steric stabilization. There is no conclusive understanding of how these sterically stabilized particles become unstable. READ MORE