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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 107 for “"Secondary Ion Mass Spectrometry"”.
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Quantitative Aspects of Secondary Ion Mass Spectrometry
Made available in DSpace on 2014-12-13T20:10:30Z (GMT). No. of bitstreams: 1 7913425.pdf: 4000069 bytes, checksum: 6b067d2890dc27cf47ba4f238ca6badf (MD5) Previous issue date: 1978
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Parameters Influencing Ionization Efficiencies in Secondary Ion Mass Spectrometry
Made available in DSpace on 2014-12-13T20:10:48Z (GMT). No. of bitstreams: 1 8009069.pdf: 4076082 bytes, checksum: 5cefe65b5abf553aa9f79d41cc59bf71 (MD5) Previous issue date: 1979
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Secondary ion mass spectrometry imaging of surface-bound microbial communities
… unseen, and often undiscovered, microbial population. In order to understand how the microbial dimension influences our own we must first understand the microbes themselves. Far from existing as a collection of single cells floating about aimlessly, bacteria largely reside in highly cooperative …
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Oxygen and hydrogen isotopic analysis of tourmaline by secondary ion mass spectrometry
The O and H isotopic composition of minerals can provide valuable information on the source of the fluids and temperature of mineral precipitation. To obtain accurate isotopic measurements using SIMS, it is important to select chemically similar standards and samples to correct for both matrix …
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Quantificatio of Isotopes Using Combined Secondary Ion Mass Spectrometry and Neutron Activation Analysis
Made available in DSpace on 2017-07-06T18:55:33Z (GMT). No. of bitstreams: 3 Narne_Gokul_MS.pdf: 109031252 bytes, checksum: b4171a0dca822f5525a7c229386a212f (MD5) Narne_Gokul_MS_ABS.pdf: 749994 bytes, checksum: 300b914dc61b67f91895395acf07c05e (MD5) license.txt: 4813 bytes, checksum: …
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Tools for imaging intracellular lipid distributions with high-resolution secondary ion mass spectrometry
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-08-01
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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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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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Probing the formation of mammalian cell lipid microdomains with nanometer-scale imaging secondary ion mass spectrometry
… Singer and Nicholson began studying the organization of the plasma membranes on mammalian cells. Since then, our understanding of this membrane has shifted from that of a homogeneous to a more heterogenous environment of proteins and lipids. The complexity of living cells have made for …
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Secondary ion mass spectrometry as a tool to evaluate chemical composition within model and cellular membranes
… tools to elucidate the chemical distribution of lipid components within the eukaryotic cellular membrane is critical to understanding their role in many cell processes. Secondary ion mass spectrometry (SIMS) is a technique that offers both chemical and spatial specificity, and has become …
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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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Using imaging secondary ion mass spectrometry to determine mammalian plasma membrane component distribution and cell differentiation state
The organization of the plasma membranes of mammalian cells has been studied for over forty years, with our understanding evolving from the fluid mosaic model of Singer and Nicholson to a more nuanced model acknowledging lateral heterogeneity in protein and lipid distributions. Within this area of …
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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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A Fundamental Study on the Relocation, Uptake, and Distribution of the Cs⁺ Primary Ion Beam During the Secondary Ion Mass Spectrometry Analysis
Combining cesium (Cs) bombardment with positive secondary molecular ion detection (MCs+) can extend the analysis capability of Secondary Ion Mass Spectrometry (SIMS) from the dilute limit (<1%) to matrix elements. The MCs+ technique has had great success in quantifying the sample composition of …
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Trace Level Impurity Quantitation and the Reduction of Calibration Uncertainty for Secondary Ion Mass Spectrometry Analysis of Niobium Superconducting Radio Frequency Materials
… nature of the discovery led to additional research to fundamentally understand the physics behind the increase in cavity performance. This knowledge gap is bridged by materials characterization. Secondary ion mass spectrometry (SIMS) is a characterization technique which has become a …
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The role of complexing agents in the flotation of pentlandite-pyroxene mixtures
… agents play in pentlandite-pyroxene flotation and focuses on the surface chemistry and interaction between valuable and gangue minerals as well as the interaction of complexing agents and reagents (xanthate, copper sulphate) in the system at pH 9. Microflotation, zeta potential …
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Photolytic Laser-Induced Chemical Vapor Deposition for Aluminum Film Growth
The mechanisms of UV photodissociation of trimethylaluminum (TMA) and triethylaluminum (TEA) by a KrF (248 nm) pulsed excimer laser were investigated using optical emission spectroscopy, including time-resolved emission measurements. Position-resolved growth rate measurements were used to …
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Native Oxides on Aluminum-Bearing Iii-V Semiconductors With Applications to High-Performance Laser Diodes
In these experiments, water vapor oxidation of Al-bearing III-V semiconductors is employed to form high quality native oxides. The oxides are examined using secondary ion mass spectrometry (SIMS) and transmission electron microscopy (TEM). The effect of the semiconductor composition and …
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Directed Phase Separation of Polymer Blends on Binary-Patterned Polymer Brushes
… microstructures is of interest for applications such as polymer solar cells, light emitting diodes, microelectronics and biosensors. Chemically patterned substrates can direct the phase separation of thin films of polymer blends, producing controlled morphologies. This has been demonstrated …
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