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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 87 for “"small angle neutron scattering"”.
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"Quantum Mechanical Analysis and Numerical Optimization of a ""zero-Field"" Spin Echo Small Angle Neutron Scattering Instrument"
The numerical simulations show that the range of spin-echo length varies from 105mum up to 10-2 mum whereas the spin-echo time from 103 ns up to 10-1ns.
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Development of a One-Dimensional Small Angle Neutron Scattering Instrument at the University of Illinois TRIGA Reactor Laboratory
Made available in DSpace on 2017-07-06T18:55:26Z (GMT). No. of bitstreams: 3 Monti_David_A_MS.pdf: 25600595 bytes, checksum: 8aff551e923ab586a0d8255cc0c1effe (MD5) Monti_David_A_MS_ABS.pdf: 489990 bytes, checksum: 7468adaf916d36dde36dddfe8940735f (MD5) license.txt: 4813 bytes, checksum: …
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Experimental study of physical-chemical factors in the sol-gel process
… techniques (multinuclear NMR, Raman, small angle neutron scattering, fluorescence polarization, viscosity, turbidity, static and dynamic light scattering experiments) have been employed to investigate the nature of the sol-gel process of tetramethyl orthosilicate; Si(OCH$\sb3$)$\sb4$; …
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Charge transport and mechanical property study of high mobility conjugated polymers
… state-of-the-art characterisation tools such as small-angle neutron scattering technique to investigate the rigidity of these highly fused polymers. Highly sensitive absorption techniques, including the photothermal deflection spectroscopy(PDS) technique is used to correlate the microstructure …
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Formation, structure, and reproducibility of cerato-ulmin hydrophobin-coated bubbles
… were investigated. For the submicron bubbles, small-angle x-ray scattering (SAXS) and small-angle neutron scattering (SANS) show the bubbles are cylindrical with a ~70 nm cross-sectional diameter and film thickness of 15 nm, the equivalent of 5 CU proteins. Atomic force microscopy (AFM) of …
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A study of conformational response of DNA to nanoconfinement by Monte Carlo simulation
… were then interpreted with the results of small-angle neutron scattering experiment in zero-average contrast condition. Finally, confined isolated hairpin formations along a linear DNA chain in a nanochannel was explored by using the cooperativity model. The two-parameter cooperativity …
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The design, synthesis and properties of pressure-processable biodegradable block copolymers
… miscibility of several block copolymer systems. Small-angle neutron scattering (SANS) experiments confirmed that amorphous forms of the poly([epsilon]-caprolactone-ran-5 ethylene ketal [epsilon]-caprolactone)-block-poly(lactic acid) (PmCL-b-PLA) system exhibit pressure- induced miscibility, and …
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High-field SANS studies of the vortex lattice in YBCO
… the vortex lattice in YBa\(_2\)Cu\(_3\)O\(_7\). Small-angle neutron scattering was used to deduce the configuration of vortices in a twinned sample of YBa\(_2\)Cu\(_3\)O\(_7\) over the field range 1–11T applied parallel to the crystal c-axis. The experiments revealed a field-induced continuous …
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Materials and coatings derived from the polymerizable ionic liquid surfactant 1-(2-Acryloyloxyundecyl)-3-methylimidazolium bromide
… subsequent polymerized wafer were analyzed by small angle neutron scattering, exhibiting similar length scales before and after polymerization. Ion exchange between Br- and PF<sub>6</sub> - in IL-Br resulted in the formation of open-cell porous structures in several of these materials, which …
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Studies of liquid-liquid phase transition and critical phenomena in supercooled confined water by neutron scattering
Small angle neutron scattering (SANS) is used to measure the density of water contained in 1-D cylindrical pores of a mesoporous silica material MCM-41-S. By being able to suppress the homogenous nucleation process inside the narrow pore, one can keep water in the liquid state down to at least 160 …
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Solution structure and biochemistry of an intramembrane aspartyl protease (IAP)
… to control the substrate specificity of mIAP. Small-angle neutron scattering (SANS) study showed that mIAP is a compact monomer in solution. Future direction of study on expanding substrate repertoire, evaluating effects of Alzheimer disease mutations, and structural characterization of …
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Microfluidics enhanced synthesis of micellar nanostructures
… In equilibrium, micelles can transition from entangled to branched structures with increasing ionic strength and temperature. Under flow conditions, micellar structure transition can follow different trajectories. In the present work, the structural and rheological evolution of both ionic and …
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Stability of Nanoporous Metals
… phase is associated with the metal ligaments. Small angle neutron scattering was used to quantitatively compare experimental samples to those generated by the phase field method. EAM results using model structures with experimentally accessible length scales are presented which demonstrate the …
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SANS investigations of the flux line lattice in unconventional superconductors
Small-angle neutron scattering has been used to study the flux line lattice (FLL) in the \(d\)-wave superconductors YBa\(_2\)Cu\(_3\)O\(_7\) and CeCoIn\(_5\). Our studies on the High-\(T_c\) superconductor YBa\(_2\)Cu\(_3\)O\(_7\) were carried out using a twin-free sample, and we present the first …
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Particle microstructure and polymer dynamics in concentrated polymer solutions
… polymer solutions are studied with extensive small angle scattering and NMR experiments. Silica nanoparticles are suspended in polymer-solvent mixtures. The effects of polymer induced interactions on the particle microstructure are examined with varying (i) polymer concentration, (ii) solvent …
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Studies of structure and dynamics of biological macro-molecular assemblies by low angle neutron diffraction and inelastic X-ray scattering
… Na-DNA molecules with the inelastic X-ray scattering (IXS). In the second part, we have developed a new efficient method to calculate the inter-particle structure factor in a simple fluid interacting with a two-Yukawa term potential and apply it to study the kinetic phase diagram and …
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A comparative study of metrology techniques for porous organic thin films
… Annihilation Lifetime Spectroscopy and Small Angle Neutron Scattering. Atomic Force Microscopy is limited to surface analysis, and pores may be intersecting the surface at a variety of chords, not necessarily the diameter. Each of these techniques also has unique advantages, and a …
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Nanocomposite Dispersion: Quantifying the Structure-Function Relationship
… corroborated through comparison to results from small angle neutron scattering dispersion analysis. Additionally, the material property improvement of SWCNT nanocomposites are linked to the dispersion state of the nanostructure allowing for correlation between dispersion techniques, quantified …
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