Synthesis Of Volatile And Thermally Stable Aluminum Hydride Complexes And Their Use In Atomic Layer Deposition Of Metal Thin Films,
2018
Wayne State University
Synthesis Of Volatile And Thermally Stable Aluminum Hydride Complexes And Their Use In Atomic Layer Deposition Of Metal Thin Films, Kyle Blakeney
Wayne State University Dissertations
The research discussed in this dissertation spans both synthetic inorganic and nanomaterials chemistry. Aluminum hydride complexes have been synthesized and characterized which are highly volatile and thermally stable and their potential as reducing agents for ALD of electropositive metal and metal-containing films was evaluated. A major discovery has been the deposition of aluminum metal films by thermal ALD using an aluminum dihydride complex supported by a simple amido-amine ligand (Chapters 2). Aluminum is the most electropositive element deposited by purely thermal ALD to date and represents a significant breakthrough for this field. This process may have important industrial applications and …
Graphene Induced Formation Of Nanostructures In Composites,
2018
University of Central Florida
Graphene Induced Formation Of Nanostructures In Composites, Chen Shen
Electronic Theses and Dissertations
Graphene induced nanostructures in graphene-based composites and the performance of these composites have been explored in this study. For the metallic nanoparticles decorated graphene aerogels composites, the fabrication of hierarchically structured, reduced graphene oxide (rGO) aerogels with heavily metallic nanoparticles was realized. Higher loading of palladium nanoparticles in graphene aerogels leads to improved hydrogen gas sensing performance. For polymer derived ceramics (PDCs) composites with anisotropic electrical properties, the fabrication of composites was realized by embedding anisotropic reduced graphene oxide aerogels (rGOAs) into the PDCs matrix. Raman spectroscopy and X-ray diffraction studies of PDCs composites with and without graphene indicate that …
Assessment Of Microstructure And Mechanical Behavior Of Materials And Phases Observed In Low-Enriched Uranium Monolithic Fuel Plates After Fabrication,
2018
University of Central Florida
Assessment Of Microstructure And Mechanical Behavior Of Materials And Phases Observed In Low-Enriched Uranium Monolithic Fuel Plates After Fabrication, Ryan Newell
Electronic Theses and Dissertations
Low enriched uranium (LEU) fuels are being developed to reduce the use of highly enriched uranium in power generation to reduce proliferation risks. Challenges arise in providing sufficient fissile U in LEU without reactor redesign. As such, a novel monolithic fuel plate design employs LEU alloyed with 10 wt. % Mo. Throughout fabrication of these fuel plates, metallurgical transformations and reactions take place as a result of elevated temperatures during processing. The transformations include decomposition of the metastable body-centered cubic γ phase in the fuel and metallurgical interactions at interfaces between fuel plate components. This work aims to provide further …
Slowdown Of Surface Diffusion During Early Stages Of Bacterial Colonization,
2018
Western University
Slowdown Of Surface Diffusion During Early Stages Of Bacterial Colonization, T. Vourc'h, H. Peerhossaini, J. Leopoldes, A. Mejean, F. Chauvat, C. Cassier-Chauvat
Civil and Environmental Engineering Publications
We study the surface diffusion of the model cyanobacterium Synechocystis sp. PCC6803 during the incipient stages of cell contact with a glass surface in the dilute regime. We observe a twitching motility with alternating immobile tumble and mobile run periods, resulting in a normal diffusion described by a continuous-time random walk with a coefficient of diffusion D. Surprisingly, D is found to decrease with time down to a plateau. This is observed only when the cyanobacterial cells are able to produce released extracellular polysaccharides, as shown by a comparative study between the wild-type strain and various polysaccharides-depleted mutants. The analysis …
Numerical Modeling And Control Of Solids Separation Using Continuously Moving Fine Mesh Filters,
2018
Western University
Numerical Modeling And Control Of Solids Separation Using Continuously Moving Fine Mesh Filters, Anthony Sherratt, Christopher T. Degroot, Anthony G. Straatman, Domenico Santoro
Mechanical and Materials Engineering Publications
No abstract provided.
The Development And Numerical Modelling Of A Representative Elemental Volume For Packed Sand,
2018
The University of Western Ontario
The Development And Numerical Modelling Of A Representative Elemental Volume For Packed Sand, Ashraf Thabet, Anthony G. Straatman
Mechanical and Materials Engineering Publications
No abstract provided.
A Porous Media Model Of Alveolar Duct Flow In The Human Lung,
2018
uwo
A Porous Media Model Of Alveolar Duct Flow In The Human Lung, Anthony G. Straatman, Christopher T. Degroot
Mechanical and Materials Engineering Publications
No abstract provided.
Hierarchical Hybrid Architectures For Robust And Reusable Nano-Devices,
2018
Wright State University - Main Campus
Hierarchical Hybrid Architectures For Robust And Reusable Nano-Devices, Sharmila M. Mukhopadhyay
Mechanical and Materials Engineering Faculty Publications
No abstract provided.
Engineering Hyaluronic Acid Carbon Nanotube Nanofibers: A Peripheral Nerve Interface To Electrically Stimulate Regeneration,
2018
Wayne State University
Engineering Hyaluronic Acid Carbon Nanotube Nanofibers: A Peripheral Nerve Interface To Electrically Stimulate Regeneration, Elisabeth M. Steel
Wayne State University Dissertations
Peripheral nerve injuries annually affect hundreds of thousands of people globally. Current treatments like the gold standard autograft and commercially available nerve guide conduits (NGC) are insufficient to repair long gap peripheral nerve injuries. NGCs can aid recovery but lack key microenvironment cues that promote nerve regeneration. We hypothesized that providing topographical, mechanical, and electrical guidance cues through a nanofibrous composite biopolymer would result in improved neuron growth metrics using an in vitro model. We embedded hydrophilic carbon nanotubes (CNT) within hyaluronic acid (HA) nanofibers by electrospinning. The aims of this study were (1) to define the topographical, nanomechanical, and …
Surfactant Driven Assembly Of Freeze-Casted, Polymer-Derived Ceramic Nanoparticles On Grapehene Oxide Sheets For Lithium-Ion Battery Anodes,
2018
University of Central Florida
Surfactant Driven Assembly Of Freeze-Casted, Polymer-Derived Ceramic Nanoparticles On Grapehene Oxide Sheets For Lithium-Ion Battery Anodes, Ali Zein Khater
Honors Undergraduate Theses
Traditional Lithium-Ion Batteries (LIBs) are a reliable and cost-efficient choice for energy storage. LIBs offer high energy density and low self-discharge. Recent developments in electric-based technologies push for replacing historically used Lead-Acid batteries with LIBs. However, LIBs do not yet meet the demands of modern technology. Silicon and graphene oxide (GO) have been identified as promising replacements to improve anode materials. Graphene oxide has a unique sheet-like structure that provides a mechanically stable, light weight material for LIB anodes. Due to its structure, reduced graphene oxide (rGO) is efficiently conductive and resistive to environmental changes. On the other hand, silicon-based …
Can A Comprehensive Transition Plan To Barefoot Running Be The Solution To The Injury Epidemic In American Endurance Runners?,
2018
Claremont McKenna College
Can A Comprehensive Transition Plan To Barefoot Running Be The Solution To The Injury Epidemic In American Endurance Runners?, Michael A. Scarlett
CMC Senior Theses
Fossils belonging to the genus Homo, dating as far back as two million years ago, exhibit uniquely efficient features suggesting that early humans had evolved to become exceptional endurance runners. Although they did not have the cushion or stability-control features provided in our modern day running shoes, our early human ancestors experienced far less of the running-related injuries we experience today. The injury rate has been estimated as high as 90% annually for Americans training for a marathon and as high as 79% annually for all American endurance runners. There is an injury epidemic in conventionally shod populations that …
The Formation And Characterization Of Mesoscopic J- And H-Aggregates With Controlled Morphologies By The Co- And Templated Assembly Of Cyanine Dyes,
2018
University of Central Florida
The Formation And Characterization Of Mesoscopic J- And H-Aggregates With Controlled Morphologies By The Co- And Templated Assembly Of Cyanine Dyes, Samuel Rhodes
Electronic Theses and Dissertations
The supramolecular aggregates of π-conjugated molecules have become an area of great interest to the scientific community in recent years for their promise in biosensors and optoelectronic devices. Among various supramolecular aggregates, J- and H-aggregates of πconjugated dye molecules are particularly interesting because of their unique optical and excitonic properties that are not given by individual molecules. H-aggregates are composed of dye molecules in a face-to-face stacking, giving rise to a blue-shifted absorption band compared with the monomer band and a strong emission quenching. In contrast, J-aggregates represent an edge-toedge stacking of dye molecules, showing a red-shifted absorption band with …
Processing Of Cubic Stabilized Zirconia Electrolyte Membranes For Electrolyte-Supported Single Cell Solid Oxide Fuel Cells Using Tape Casting,
2018
University of Central Florida
Processing Of Cubic Stabilized Zirconia Electrolyte Membranes For Electrolyte-Supported Single Cell Solid Oxide Fuel Cells Using Tape Casting, Arturo Coronado Rodriguez
Honors Undergraduate Theses
Electrochemical conversion devices are a developing technology that prove to be a viable and more efficient alternative to current environmentally friendly generation devices. As such, constant research has been done in the last few decades to increase their applications and reliability. One of these systems, and the focus of this research, is the single cell Solid Oxide Fuel Cell (SOFC). These systems are a developing technology which main caveat is the need of high operating temperatures and costs. As such, most multidisciplinary research has been focused on researching materials and/or processes that help mitigate the costs or lower the operating …
Equibiaxial Flexural Strength Testing Of Advance Ceramics,
2018
University of Central Florida
Equibiaxial Flexural Strength Testing Of Advance Ceramics, Ryan T. Jordan
Honors Undergraduate Theses
Ceramics are very important materials with many unique properties used in numerous industrial applications. Ceramics could be very hard and very strong in comparison to metals; however, they are very brittle, thus they are prone to instantaneous and catastrophic failure. Therefore, their reliability is compromised and it is very important to have advanced techniques that allow evaluating their mechanical behavior in many unusual stress states. One of such testing methods is biaxial strength method, that allows to measure properties not only unidirectional, but also in a biaxial way. The research work for this thesis will be built on design and …
Experimental Study On Surface Integrity Of Cryogenically Machined Ti-6al-4v Alloy For Biomedical Devices,
2018
RWTH Aachen University, Germany
Experimental Study On Surface Integrity Of Cryogenically Machined Ti-6al-4v Alloy For Biomedical Devices, M. Hardt, F. Klocke, B. Döbbeler, M. Binder, Ibrahim S. Jawahir
Institute for Sustainable Manufacturing Faculty Publications
Titanium and its alloys are widely used in the biomedical sector. In this field, titanium and its alloys are the material of choice for biomedical devices such as hip and knee replacements. Usually, a Total Hip Replacement (THR) is based on four components, made out of different materials due to the material properties associated with the functional performance. One approach to lower the overall manufacturing costs and enhance the reliability of THR’s is to manufacture the prosthesis out of one material. The titanium alloy Ti-6Al-4V is, therefore, feasible as it exhibits better osseous integration compared to other metallic materials used …
Topology Optimization Of Lightweight Structural Composites Inspired By Cuttlefish Bone,
2018
South Dakota State University
Topology Optimization Of Lightweight Structural Composites Inspired By Cuttlefish Bone, Varun Kumar Gadipudi
Electronic Theses and Dissertations
Lightweight material structure is a crucial subject in product design. The lightweight material has high strength to weight proportion which turns into an immense fascination and a territory of investigation for the researchers as its application is wide and expanding consistently. Lightweight composite material design is accomplished by choice of the cellular structure and its optimization. Cellular structure is utilized as it has wide multifunctional properties with lightweight characteristics. Unless it has been topologically optimized, each part in a assembly most likely weighs more than it needs to. Additional weight implies abundance materials are being utilized, loads on moving parts …
Bio-Mimetic Design With 3d Printable Composites,
2018
South Dakota State University
Bio-Mimetic Design With 3d Printable Composites, Ramya Mitra Patnam Damodaram
Electronic Theses and Dissertations
Weight and stiffness are key factors in the advancement of materials and parts for use in numerous industries. Lightweight cellular structures are broadly utilized for this reason. However, these structures must satisfy several key constraints: they should be light yet structurally safe, sustainable in different loading conditions, resource efficient and easy to maintain. Bio-inspired materials/structures which results in desirable material features are a significant inspiration for engineered cellular structures. Cellular structures can be designed to have multifunctional properties along with lightweight characteristics. Currently, these structures with high strength to weight ratio are widely applied in many fields such as automotive, …
Novel Technique Of Fabrication Of Porous Copper And Copper Oxide To Improve The Lithium Ion Battery Performance,
2018
South Dakota State University
Novel Technique Of Fabrication Of Porous Copper And Copper Oxide To Improve The Lithium Ion Battery Performance, Raju Prasad Ghimire
Electronic Theses and Dissertations
Due to widespread and long-term application, Lithium-ion batteries are considered as promising power sources for portable devices, satellites, medical instruments, computers, electric vehicles and grid application. It started to occupy the market once Sony commercialized in 1991. Rechargeable lithium ion batteries drawing people attention due to their peculiar properties such as high energy density and low self-discharge compared to other alkali metals. However, these widespread and long-term applications still require better batteries in terms of performance, safety and cost, which can be achieved by better utilization of anode materials and/or an optimized design of battery configuration. There are several challenges …
Development Of Material For 3d Printed Habitats With Extraplanetary Applications,
2018
South Dkaota State University
Development Of Material For 3d Printed Habitats With Extraplanetary Applications, Taylor Wait
Electronic Theses and Dissertations
3D printing, also called Additive Manufacturing, has increasingly become a focus for research because of the potential to replace complicated assemblies or complex parts with a single printed item. The space industry is very interesting in studying 3d printing with parts being tested and used on rockets, a 3D printer being installed at the International Space Station and is being developed for use in manned exploration of extraplanetary bodies to build habitats. To encourage teams from around the world to develop technologies and materials for autonomous habitat construction using minimal Earth exports, NASA created the 3D Printed Habitat Challenge. NASA …
Pathways For Mitigating Thermal Losses In Solar Photovoltaics,
2018
Univ Lyon, CNRS, INSA-Lyon, Université Claude Bernard Lyon
Pathways For Mitigating Thermal Losses In Solar Photovoltaics, Rodolphe Vaillon, Oliver Dupre, Raúl Bayoán Cal, Marc Calaf
Mechanical and Materials Engineering Faculty Publications and Presentations
To improve the performance of solar photovoltaic devices one should mitigate three types of losses: optical, electrical and thermal. However, further reducing the optical and electrical losses in modern photovoltaic devices is becoming increasingly costly. Therefore, there is a rising interest in minimizing the thermal losses. These correspond to the reduction in electrical power output resultant of working at temperatures above 25 °C and the associated accelerated aging. Here, we quantify the impact of all possible strategies to mitigate thermal losses in the case of the mainstream crystalline silicon technology. Results indicate that ensuring a minimum level of conductive/convective cooling …
