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 127 for “"Mechanical stability"”.
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Thermal and Mechanical Stability of Nanograined FCC Metals
… cubic free-standing thin films under thermal and mechanical loading, while also raising many previously unaddressed questions on the active mechanisms under these loads.
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Chemical and Mechanical Stability of Copper Carboxylate Metal-Organic Frameworks
… difficulties because of their low chemical stability to common substances like water or even air moisture, substances difficult to avoid in applications like those above mentioned. Another issue concerning MOF industrialization consists in the low packaging of the micrometric powder grains …
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Volcanic deformation as an indicator of mechanical stability and eruption susceptibility
… Through a series of three-dimensional thermo-mechanical numerical experiments, this dissertation bridges competing paradigms in volcanology of internal and external eruption triggers by identifying greater complexity in and coupling of the processes responsible for triggering caldera …
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Mechanical stability evaluation of i-motif and G-quadruplex structures under diverse circumstances
… of G-quadruplex and i-motif structures, their mechanical stability which determines the interaction with motor proteins, such as DNA/RNA polymerases, are poorly studied. Since DNA exists as a double stranded form in vivo, the investigation of i-motif becomes highly important to fully understand …
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Use of a quartz crystal microbalance to investigate the mechanical stability of silica xerogel membranes for volatile iodine capture
… efficiency, only limited information about their mechanical applicability is found in the literature. This study investigates mechanical stability of silica-based adsorbents under the gas flow conditions to evaluate and quantify the effects of flow on the structural integrity of the tested …
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Homeostatic Elastic States and the Stability of Elastic Arteries
… they seek to maintain constant a preferred mechanical state (mechanical homeostasis) thereby exhibiting a remarkable mechanical stability in response to temporal evolution and alterations in blood pressure, vessel tethering forces and geometry and material properties. The mechanical state …
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The nanomechanics of polycystin-1: A kidney mechanosensor
… on proteins. Nothing is known about how the mechanical properties of PC1 are affected by these osmolytes. Here I use nano-mechanical techniques to study the effects of missense mutations and effects of denaturants and various osmolytes on the mechanical properties of PKD domains. Several …
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Poly(Ethylene Oxide)/Graphene Oxide Polymer Nanocomposite Electrolyte for Lithium Ion Batteries
… traditional liquid electrolytes while offering mechanical stability and thin film manufacturability. The main issue with SPEs is the lower ionic conductivity at room temperature compared to that of liquid electrolytes. Nanosized ceramic powders are known to enhance the ionic conductivity as well …
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Inorganic-organic hybrid materials and abrasion resistant coatings based on a sol-gel approach
… only partial success. The films obtained had low mechanical stability. This was attributed to the low reactivity of the triethoxy species under neutral and basic conditions. In contrast, films with good mechanical stability were obtained when the TEOS was replaced with titanium tetraisopropoxide …
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Molecular Engineering of Self-Assembled and Mechanically Robust Polymer Solar Cells
… solar cells, (ii) the long-term thermal instability of polymeric emulsions and (iii) poor mechanical stability. In this thesis, we propose to study polymers, block copolymers, chemical additives, and polymer composites used in the bulk-heterojunction organic photovoltaics solar cells. …
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Nanoparticle Encapsulation and Aggregation Control in Anti-reflection Coatings and Organic Photovoltaics
… of nanoparticles, appropriate dispersion and stability measures must be implemented. In this dissertation, different types of nanoparticles are coated with polymer and metallic layers to enable their effectiveness in both anti-reflection coatings (ARCs) and organic photovoltaics (OPVs). Ionic …
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Understanding The Mechanism Of Gaseous Iodine Capture Using Sodium-Loaded Carbon Foams
… of the original organic polymer, which added mechanical stability to the carbon foam. After aging in nitrogen dioxide, the capture of iodine decreased, as did the mechanical stability, which was attributed to the formation of sodium nitrate. The sodium iodide captured by the carbon foams can …
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Carbon Coating for Improved Hydrothermal Stability of Silica Supports
… are used as catalyst supports because they are mechanically stable, have large surface areas, and synthesis methods are well established but they tend to react with water and lose their integrity during aqueous phase reactions at elevated temperatures. Mesoporous carbons are an attractive …
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Pulsed-Power Busbar Design for High-Powered Applications
… capable of handling in excess of 25kJ, both mechanical and electrical analyses were performed to verify a capable design. The following methodology describes how the Lorentz force was balanced with mechanical forces during the design process and then validated after construction was completed …
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Composite low temperate hydrogen storage material on the basis of iron-titanium alloy ; synthesis and structure
… safety, appropriate thermodynamics, high mechanical strength, reversibility of the system and fast kinetics based on a well known “low temperature” intermetallic alloy (Ti/Fe) as the core. In the course of achieving this objective, the structural, thermal, chemisorptive and physisorptive …
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Single Crystal Sapphire Photonic Crystal Fibers
… the harsh environments impacted the optical and mechanical stability of the bundled fiber.
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Rigidity and Fluidity in Living and Nonliving Matter
… does not address the geometry of local</p> <p>mechanical stability. The jamming graph contains both properties of global mechanical stability at the onset of jamming and local mechanical stability. We demonstrate how jamming graphs can be constructed using local rules via the Henneberg …
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Grafting polymers on nanosheets : a route for the fabrication of freestanding polymer brushes
… biosensors, etc. Crosslinking enhances mechanical stability of FCCP monolayers, so they can be released from the substrate by dissolution from their substrate or by scission of the anchor group-substrate bonds. This results in an extremely flat, two dimensionally extended layer which is …
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Development and characterisation of a Portland cement-based dental root filling material
… dental materials, whilst maintaining the mechanical, biological and sealing properties. 10wt%PoP accelerated initial setting times of grey and white model cements and MTA from >6h to <40min, and did not significantly change compressive strengths and relative porosities with long-term …
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