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 18 of 18 for “"Time of flight secondary ion mass spectrometry (TOF-SIMS)"”.
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Time-of-Flight Secondary Ion Mass Spectrometry Analysis of Microbial Induced Corrosion of Glasses
Microbially-induced corrosion (MIC) is an emerging topic that has huge environmental impacts, such as long-term evaluation of microbial interactions with radioactive waste glass, environmental cleanup and disposal of radioactive material, and weathering effects of microbes. Improved understanding …
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Gold Nanomaterial–Biomolecule Interactions: Influence of Size, Gold Nanomaterial–Biomolecule Interactions: Influence of Size, Surface Chemistry, and Environment Surface Chemistry, and Environment
… as great candidates for biomedical applications because of their physicochemical properties and high biocompatibility. However, their performance strongly depends on their interactions with biomolecules and their stability under physiological environments. This dissertation investigates the …
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Site-specific immobilization of tetrazine-modified green fluorescent protein on trans-cyclooctene surfaces
The ability to control the orientation of proteins attached to a surface, one of the goals of this work, has applications within areas such as microarrays, biomaterials, tissue engineering and biosensors. Non-covalent protein adsorption (physisorption), the easiest of all protein-attachment …
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CRYOGENIC MICROSCOPIES OF ENERGY STORAGE MATERIALS: INSIGHTS INTO METAL ANODES, SOLID-ELECTROLYTE INTERFACES, AND MXENES
… global energy demand has intensified the pursuit of high energy density storage technologies, focusing on metal anode systems that promise higher energy density at lower cost. This dissertation presents comprehensive research that advances our understanding of energy storage materials, including …
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Nanomechanical Properties of Polymer-Grafted Nanoparticle Ultrathin Films
Polymer thin films have recently become one of the most emerging research areas due to their profuse applications in energy storage, flexible electronics, and photonics. The mechanical response of polymer thin films is crucial in defining a high-performance device encompassing the film’s …
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Characterization, Functionalization and Applications of Alkyl Monolayers on Silicon Surfaces
<p>Investigations were performed on the stability, mechanism of formation and an application of alkyl monolayers chemomechanically prepared on silicon surfaces. A new method of surface modification, laser-activation modification of surfaces (LAMS), and multivariate analyses of time-of-flight …
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Identification and imaging different lipid species within phase-separated model membranes by integration of TOF-SIMS and principal component analysis
Time of flight secondary ion mass spectrometry (TOF-SIMS) enables chemically imaging the distributions of various lipid species in model membranes. However, discriminating the TOF-SIMS spectra of structurally similar lipids is very difficult because the low mass fragment ions that are abundant in …
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Role of nitrogen in the structure and properties of proton irradiated 12Cr1MoWV ferritic/martensitic steel for advanced nuclear reactor cores, The
… development. As such, understanding the relationship between microstructure and mechanical properties in the context of irradiation environments for these steels is critical. Nitrogen content has been hypothesized to have a significant effect on the irradiated properties of alloy HT9. In this …
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Small molecule profiling and imaging of the zebra finch song system
The ability of songbirds to communicate though learned vocalization and the discovery of discreet interconnected “song nuclei” involved in vocal learning has made them a valuable model to study the neuronal mechanisms behind learning and memory. This dissertation focuses on studying small molecules …
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Methods for the analysis of low-Z plasma facing surfaces in magnetic fusion applications
A number of advances in the design and operating performance of magnetic fusion devices have been made in recent decades. While the optimization of reactor components and magnetic topologies have led to considerable improvements in plasma density, temperature, and confinement time, research also …
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Investigation of the Structure of Alkyne Self-Assembled Monolayers on Gold and the Development of Matrix-Enhanced Secondary Ion Mass Spectrometry Methods
Characterization of thin films is critical to the understanding of many technological and biological processes. The focus of this dissertation is to develop methods to characterize very low concentration species present on surfaces. A reflection adsorption infrared spectroscopy: RAIRS) system was …
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Influence of impurities on the crystallisation of pharmaceutical materials
The major part of this thesis describes work done to investigate the organic and inorganic impurity content in metformin hydrochloride samples and their effect on induction time and nucleation kinetics. Crystallisation from solution plays a significant role in the pharmaceutical, chemical and food …
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The Use of Secondary Ion Mass Spectrometry to Advance Integrated Process Technology for 2D Materials
Despite the advancements in 2D material fabrication methods, the development of scalable manufacturing and device integration strategies are critical bottlenecks that currently hinder the commercial application of low-dimensional nanomaterials. Trace contaminants can significantly influence the …
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Development of novel alternative chemistry processes for dielectric etch applications
The removal of dielectric films in semiconductor processing relies almost exclusively on the use of perfluorocompounds (PFCs), which are suspected global warming agents. The two applications in semiconductor manufacture that account for the largest use and emissions of PFCs are the patterning of …
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Mass spectrometry methods for imaging cellular lipids, organelles, and proteins
Lipids and their secondary metabolites function as energy storage molecules, structural components in cellular membranes, and messengers that can alter cellular function. Imaging the distributions of various lipid species within tissues and cells can yield insight into the mechanism by which lipids …
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Surface chemistry of metal oxide materials: from metalorganic and organic reactions to gas sensing
… materials have been widely used in the fields of catalysis and gas sensing fields. Due to its unique physical and chemical properties, zinc oxide (ZnO) has attracted considerable attention. It is not only used as a catalyst for various surface reactions but also as a catalytic support. Cu/ZnO …
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Applying secondary ion mass spectrometry to cellular and model membranes to image component distribution and quantify composition
Abstract Secondary ion mass spectrometry (SIMS) returns chemically specific data on membrane component distribution and composition. Of particular interest is a membrane protein’s lipid environment, which may play a role in the protein’s function. Herein, this thesis describes the synthesis of …
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The relationship between enthalpy of immersion, and its derived wettability parameters, to flotation response
The wettability of mineral surfaces plays an important role in the flotation process. A wettable mineral is hydrophilic while a non-wettable mineral is hydrophobic. In the flotation process, sufficiently hydrophobic particles are collected by rising air bubbles and they report to the concentrate. …