Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Copper (2)
- Alloy composition (1)
- American ginseng (Panax quinquefolius) (1)
- Atomic layer deposition (1)
- Batteries (1)
-
- Bentonite (1)
- CO2 adsorption form. (1)
- Characterization (1)
- Chloride (1)
- Chromium (1)
- Corrosion Dynamics (1)
- Corrosion Mechanism (1)
- Diamond anvil cell (1)
- Electrochemical Reactions (1)
- Electrochemistry (1)
- Electron-beam lithography (1)
- Energy storage (1)
- Extracellular vesicles (1)
- Extraction (1)
- Framework stability (1)
- Galvanic corrosion (1)
- Gamma Radiation (1)
- Ginseng replant disease (1)
- Ginsenoside (1)
- Guest-host interaction (1)
- High pressure (1)
- Infrared spectroscopy (1)
- Interfacial Reactions (1)
- Li metal (1)
- Mesenchymal stromal cells (1)
Articles 1 - 7 of 7
Full-Text Articles in Physical Sciences and Mathematics
Characterization Of Extracellular Vesicles By Surface-Enhanced Raman Spectroscopy, Nina M. Culum
Characterization Of Extracellular Vesicles By Surface-Enhanced Raman Spectroscopy, Nina M. Culum
Electronic Thesis and Dissertation Repository
Extracellular vesicles (EVs), which are nanoscale vesicles secreted by cells into biofluids, are of research interest due to their roles in intercellular communication. EVs released from mesenchymal stromal cells (MSCs) have tremendous potential in cell-free regenerative medicine, while EVs released from diseased cells are being studied as biomarkers for minimally invasive and early disease detection. Presented in this thesis are gold nanohole arrays for the capture and sensitive detection of EVs by surface-enhanced Raman spectroscopy (SERS), a plasmonic technique capable of single molecule detection. Herein, we have characterized EVs released from MSCs and ovarian cancer cells, with a focus on …
The Design And Characterization Of Advanced Li Metal Anodes For Next-Generation Batteries, Keegan R. Adair
The Design And Characterization Of Advanced Li Metal Anodes For Next-Generation Batteries, Keegan R. Adair
Electronic Thesis and Dissertation Repository
Li metal batteries have been widely regarded as the next stage of energy storage technology, which is enabled by the low electrochemical potential (-3.04 V vs. the standard hydrogen electrode) and high specific capacity (3860 mAh g-1) of the Li metal anode. However, the implementation of Li metal anodes has been hindered by several issues including parasitic side reactions with electrolyte, large volume fluctuations, and dendrite formation which can cause short-circuits and safety issues. This thesis will cover some novel Li anode stabilization strategies while using advanced characterization techniques to provide critical information on the working mechanisms of …
The Analysis Of Ginsenosides In Ginseng Garden Soil, Karina Marie Kaberi
The Analysis Of Ginsenosides In Ginseng Garden Soil, Karina Marie Kaberi
Electronic Thesis and Dissertation Repository
American ginseng (Panax quinquefolius L.) produces natural products called ginsenosides. The biggest challenge Ontario commercial ginseng farmers face is ginseng replant disease. To understand the function of ginseng root exudates, ginsenoside accumulation and persistence over time were investigated. Currently, no reliable ginsenoside specific extraction method, characterizing the changes in soil chemistry exists. Ginsenoside extraction protocol optimization was required to determine how ginsenoside composition changed over time. Overall, protocol optimization resulted in a 30% increase in yield of ginsenosides compared to previous extraction protocols. In the ginseng gardens, ginsenoside accumulation occurs slowly and did not reach significantly measurable amounts until the …
Copper Corrosion Dynamics Under Deep Geologic Repository Conditions, Masoumeh Naghizadeh
Copper Corrosion Dynamics Under Deep Geologic Repository Conditions, Masoumeh Naghizadeh
Electronic Thesis and Dissertation Repository
Canada’s plan for the permanent disposal of spent nuclear fuel involves a multiple-barrier system contained within a deep geologic repository (DGR). The key engineered barrier is the used fuel container (UFC), which is a copper-coated carbon steel vessel. The environments to which the copper coating will be exposed in the DGR are very different from those commonly encountered in copper corrosion studies. The copper (Cu) will be in contact with thin stagnant layers of water, and the corrosion system will be exposed to a continuous flux of γ-radiation. In the presence of γ-radiation, water and humid air decompose to redox-active …
Galvanic Corrosion Of Carbon Steel Coupled To Copper In Used Nuclear Fuel Containers, Lindsay J. Braithwaite
Galvanic Corrosion Of Carbon Steel Coupled To Copper In Used Nuclear Fuel Containers, Lindsay J. Braithwaite
Electronic Thesis and Dissertation Repository
Deep geological containment of used nuclear fuel will rely on multiple engineered and natural barriers, two of which are the copper-coated used fuel containers and the compacted bentonite clay buffer boxes in which the containers will rest. This work focused on possible galvanic interactions between the copper coating and the steel substrate of the container, which may occur at a hypothetical through-coating defect. In the presence of various amounts of chloride, bentonite, and oxygen, corrosion of the copper/carbon steel couple was studied using electrochemical tests complemented by surface characterization and 3D X-ray imaging. We investigated the effects of copper-to-steel area …
High-Pressure Studies Of Flexible Metal-Organic Frameworks And Their Performance For Co2 Adsorption Using Infrared Spectroscopy, Boqing Li
Electronic Thesis and Dissertation Repository
Metal-organic frameworks (MOFs) are crystalline porous materials comprising metal ions/clusters and organic linkers. MOFs feature very large surface area and broad tunability, which distinguish them from traditional CO2 adsorbents. High external pressure can significantly modify the framework structures and CO2 adsorption properties of MOFs. MIL-53(Al) and NH2-MIL-53(Al) exhibit excellent CO2 affinity by forming hydrogen bonds between bridging OH groups and adsorbed CO2. We used in situ infrared spectroscopy to investigate the high-pressure performance of their framework structures and CO2 adsorption capacities. Diamond anvil cell was employed to apply high pressures in gigapascal …
Investigating The Corrosion Behaviour Of Ni-Based Alloys In Industrially Relevant Environments, Jeffrey D. Henderson
Investigating The Corrosion Behaviour Of Ni-Based Alloys In Industrially Relevant Environments, Jeffrey D. Henderson
Electronic Thesis and Dissertation Repository
Typical engineering materials may experience high corrosion rates when exposed to aggressive service conditions. Such conditions include high concentrations of aggressive anions and oxidants, high solution acidity, and/or high temperatures. Alloys with high corrosion resistance may be selected to avoid material failure caused by corrosion, for example, Ni-Cr-Mo alloys. These alloys exhibit excellent corrosion resistance due to the formation of a passive oxide film, primarily containing Cr and Mo. However, film breakdown can result in localized corrosion, e.g., crevice corrosion. Localized corrosion processes can penetrate deep into the bulk alloy, threatening its integrity. While the oxide film and localized …