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Showing 1 to 18 of 18 for “"neutron reflectivity"”.
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Adsorption of Dendritic Fluorocarbon End-Capped Poly(Ethylene Oxide) at an Air-Water Interface – A Synthetic, Analytical and Computational Study
… dependence information can be found using neutron reflectometry. A key component of this project is to utilize molecular dynamics (MD) to simulate the behaviour of these polymers at liquid surfaces. For relatively short polymer chains, it is possible to quantitatively model the distribution …
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Self-assembly of linear-dendritic diblock copolymers
… covalently bonded to one chain end. Specular neutron reflectivity has been used to investigate the structure of monolayers formed at an air-water interface. The dendritic end groups were functionalized with deuterated stearic acid to make the dendritic block hydrophobic, resulting in a …
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Miscibility of polymer blends
… by diffusion studies using light microscopy and neutron reflectivity, that the diffusion rates are extremely slow and therefore do not control the phase formation and separation processes. These experiments also indicate that the microstructures of solvent cast samples and samples prepared by …
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Deuterium Phase Behavior in Thin Film Pd
… was measured at room temperature with in situ neutron reflectometry. Room temperature solubility isothermal curves, out-of-plane film expansion, and deuterium depth profiles were determined from fits to the neutron reflectivity data. The measurements demonstrate that the deuterium solubility …
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Supramolecular Chemistry at the Polymer-Oil Interface
… studied via solution depletion isotherms and neutron reflectivity measurements. The isotherms confirmed the adsorption of the molecules whilst neutron reflection was used to characterise the layers. For alkylphenol, a rather sparsely packed layer of the molecules and solvent existed at the …
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Short-time interdiffusion at polymer interfaces: A probe to study polymer motion
… Concentration profiles were measured with neutron reflectivity and secondary ions mass spectroscopy, up to the times of the order of the reptation time ($\tau\sb{\rm d}$) of the polymers. The following results were obtained.
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A Physicochemical and Biophysical Investigation into the Role of Lysyl- Phosphatidylglycerol in the Membrane of Staphylococcus aureus under mild acidic conditions
… properties. The experimental techniques included neutron diffraction, small-angle neutron scattering, neutron reflectivity, pressure–area isotherms, zeta potential measurements and 2H-NMR.<br/>Results: Increased L-PG synthesis at pH 5.5, to ~50% total phospholipid, correlated with mprF and graRS …
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Solubilisation and emulsification of silicone oils in aqueous surfactant systems
… L-77 by dilution below the cmc. The preliminary neutron reflectivity study showed that PDMS forms a thinlayer on top of the surfactant chain region.For the anionic surfactant AOT, the transition of Winsor systems at equilibrium for hexamethyldisiloxane (0.65 cS)+AOT+aqueous NaCI from I- 111-1is1 …
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Synthesis and Blend Behaviour of Multi-End Capped Polyethylene
… (IBA), contact angle measurements and several neutron scattering measurements, including neutron reflectivity (NR), small angle neutron scattering (SANS) and quasi-elastic neutron scattering (QENS) and studies proved surface enrichment with fluoro-chain ends. This work has shown that blends of …
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Advances in experimental methods to probe surface relief grating formation mechanism in photosensitive materials
… stress along the topography grating. The neutron reflectivity measurements of the metal/polymer interface indicate the penetration of metal layer within the polymer resulting in the formation of bonding layer that confirms the transduction of light induced stresses in the polymer layer to …
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Introduction of a thermo-sensitive non-polar species into polyelectrolyte multilayer capsules for drug delivery
… a barrier layer. This conclusion was proven with Neutron Reflectivity by showing the decreased presence of D2O in planar polyelectrolyte films after annealing creating a barrier layer. The permeability of capsules could also be decreased by the addition of a wax layer. This was proved by the …
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Structural Characterization of the Interfacial Structure of the Working Electrode in Dye-sensitized Solar Cells Using X-ray and Neutron Techniques
… the working electrode in DSSCs using X-ray and neutron techniques. Chapters 1 and 2 provide an introduction to X-ray reflectometry (XRR) and neutron reflectometry (NR) techniques, i.e., the principal analytic tools used for research carried out in the context of this thesis. Chapters 3, 4, and 5 …
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Spintronics Physics of Thin-film Interfaces
… muon spin relaxation ($\mu$SR) and polarised neutron reflectivity (PNR). The behaviour of our EuO(001) film is unlike that reported in the literature for stoichiometric EuO and EuO$_{1-x}$ films, and no increase in the $T_{C}$ was detected by the $\mu$SR. Instead, a reduction of $\sim$2.6 K in …
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On Clay Minerals: Adsorption and Modification
Clay minerals are prevalent in nature and are a key component of sandstone-based oil reservoirs. Understanding the behaviour of organic components at clay mineral surfaces is therefore important for elucidating the mechanisms of oil recovery. These clay - organic interactions are of interest both …
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Structural Elucidation of the Interaction Between Neurodegenerative Disease-Related Tau Protein with Model Lipid Membranes
… tau and model membranes, we utilized X-ray and neutron scattering techniques. X-ray reflectivity indicated tau aggregated at air/water and anionic lipid membrane interfaces and penetrated into membranes. More significantly, membrane interfaces induced tau protein to partially adopt a more …
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Improved Performance of Multilayer Neutron Monochromator by Additon of Hydrogen in Titanium Layer
Made available in DSpace on 2017-07-06T18:48:52Z (GMT). No. of bitstreams: 3 Ju_Hyunsu_MS.pdf: 13210324 bytes, checksum: be7c79b6c5b4a6f2d301fa24ed847746 (MD5) Ju_Hyunsu_MS_ABS.pdf: 77999 bytes, checksum: 00214c3fb36571a3d0b25a628b64512e (MD5) license.txt: 4813 bytes, checksum: …