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.
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Showing 1 to 20 of 24 for “"Phase structures"”.
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Boundary element modeling of elasticity in materials in terms of distribution of second phase structures
… is used to study the interaction of second phase objects in a material. In particular, this study examines the relationship between stress parameters, such as stress concentration and normal traction, and geometrical parameters such as separation distance and orientation. The use of BEM …
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Development of Ion Mobility Mass Spectrometry Instrumentation to Investigate the Gas-Phase Structures of Protein and Protein Complex Ions
… protein and protein complex ions. IM-MS is a gas-phase analytical technique that separate ions based on their collision cross section (a description of ion shape) and mass-to-charge ratio. Electrospray ionization of samples from buffered solutions at biologically relevant pH generates …
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I. Crystallization, Phase Structures, and Properties of Wax - Polyethylene Systems. Ii. Some Electron Diffraction Studies of Iron - Nickel Alloys
Made available in DSpace on 2014-12-05T19:36:42Z (GMT). No. of bitstreams: 1 0023396.pdf: 9210462 bytes, checksum: 199efe827d5284b04b0bb7ca783e05ad (MD5) Previous issue date: 1957
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A Mesoscale Dynamics study of the phases in surfactant-water ternary systems
… the ability of small molecules to control phase structures in non-ionic surfactant-water systems. The ability to control phase structure has positive implications for potential templating applications which require ordered and stable phases with high surface curvature. The phases present in …
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Molecular self assembly in flurocarbon surfactant / water systems
… surfactants in water. These systems showed phase behaviour uncharacteristic of ionic perfluorocarbon surfactant systems in that they exhibit a clouding phenomenon with increasing temperature. This behaviour was ascribed to the tight association of the large, hydrophobic counterions with the …
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New modalities for strain engineering of lead-free perovskite ferroelectric thin films
… as the presence of the so-called morphotropic phase boundary (MPB) ̶ a temperature-independent composition-driven structural instability that results in superior dielectric and piezoelectric properties. However, increasing environmental concerns are driving efforts towards the development of …
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Stability of nanostructured : amorphous aluminum-manganese alloys
… liquid electrodeposition, by which various nanostructures and dual-phase structures can be created by controlling the Mn solute incorporation level. The manganese exhibits grain boundary segregation in the Al-Mn solid solution in the as-deposited condition, which contributes to enhanced …
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Counterion identity effects on the self-assembly processes in a series of perfluorinated surfactant - water mixtures
… counterion on the lyotropic liquid crystalline phase behaviour of some quaternary ammonium salts of perfluorodecanoic acid in water have been studied using a combination of optical polarising microscopy (OPM), deuterium nuclear magnetic resonance (211 NMR) and cryo-transmission electron …
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Solvation Energy Calculations of Homologous Trimethylammoniocarboxylates
… energies were determined from both the gas phase energy and free energy of solution. Conformational analysis was performed on each molecule to locate the lowest energy structures and determine the Boltzmann population of each conformation for each molecule. The final solvation energies for …
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Experimental Study of Two-Phase Cavitating Flows and Data Analysis
… of quantitative experimental data on the two-phase structures and dynamics inside the opaque cavitation areas. This dissertation is aimed at finding out the physical mechanisms governing the cavitation instabilities and making contributions in controlling hydraulic cavitation for engineering …
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Structural Comparison of Denatured and Supercharged Proteins in Gas and Solution Phases
… allow for top-down analysis to determine protein structures. As a gas phase technique, it is crucial to understand how ions fold or unfold in the gas phase without the support of solvents/water, as well as how they behave during the various energy and pressure changes experienced throughout the …
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Investigating structural and stability characteristics of native-like proteins using ion mobility-mass spectrometry (IM-MS) in positive- and negative-ion mode.
… for stabilizing the three-dimensional structures of a protein when it is introduced to the gas-phase. By maintaining and investigating a folded protein's gas-phase structure, one can learn the stoichiometry, subunit composition, and binding constants. The focus of this dissertation is …
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X-ray and spectroscopic studies of organotin compounds.
… and an outline of the determination of crystal structures by X-ray analysis have been made. Crystallographic and spectroscopic studies have been made of novel organotin compounds, allowing comparison of solid and solution phase structures to be made. Rationalisation of reactivities has also been …
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Characterizing the tensile behavior of additively manufactured Ti-6Al-4V using multiscale digital image correlation
… as columnar grain morphology and nonequilibrium phase structures, influence the micro-scale deformation behavior. A low magnification in-situ DIC study (referred to as the macro-scale study) was performed during tension experiments to assess the bulk properties of most specimens while the …
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From interfacial nanostructures to advanced constructs: harnessing surfactant self-assembly at liquid interfaces
… promising platform for fabricating soft material structures by depositing an ink phase within an immiscible support bath. While this technique enables the creation of complex architectures for applications in biomedical engineering, drug delivery, and tissue scaffolding, its broader potential is …
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The effects of small molecules and polymer on the phase behaviour of C16EO16 - water mixture
… (lysozyme) on the lyotropic liquid crystalline phase behaviour of hexaethylene glycol n-hexadecyl ether (C16E06) and water ( 2H20) mixtures has been investigated. A combination of optical microscopy and 2H NIVIR spectroscopic measurements were carried out to establish the phase diagram upon …
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Designing and Fabricating 3D Nanostructures through Directed Self-Assembly of Block Copolymers
Intricate designs of 3D nanostructures are needed in different research areas. Our current techniques for fabrication of 3D structures are limited by either length scale or efficiency. Compared to the conventional methods such as ‘top-down’ lithography, self-assembly of block copolymer (BCP) …
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Design of 3D Complex Nanostructures Using Block Copolymer Self-Assembly
… pursuit of designing high quality complex nanostructures is required by the modern nanotechnology. However, the conventional 'top-down' lithography is limited by the rapidly increasing cost and difficulty when operating on length scales below 20 nm. As an alternative, block copolymer (BCP) …
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Fundamental research into gold nanocluster properties
… with both these nanoclusters through solution phase magnetic studies. Through this, electronic structure information has been obtained to elucidate the behavior of unique superatomic 1G and 1H orbitals. Looking at the outside of a nanocluster structure, interactions of nanoclusters with other …
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Surface layer evolution in glow discharge optical emission spectroscopy.
… materials and the depth profiling of multi-layer structures. Most research in the use of GDOES has concentrated on developing accurate methodologies for quantitative analysis and depth profiling. However, this thesis presents a study on various aspects of surface layer evolution under argon ion …
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