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 20 for “"material engineering"”.
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Material engineering for Li-ion capacitors and Li-ion batteries
… kinetic. The present work addresses the issue by engineering electrode and electrolyte materials. 1) Two-dimensional material (vanadium disulfide anode and nitrogen-doped reduced graphene oxide cathode) are developed to combat the low power density of battery-type electrodes and the low energy …
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Power Electronics Based on Ultrawide Bandgap Semiconductors: from Material Engineering to Device Applications
This work demonstrates high-performance BN/β-Ga2O3 metal-insulator-semiconductor Schottky barrier diodes (MIS SBDs). The BN layer is directly grown on the β-Ga2O3 by pulsed laser deposition (PLD). The presence of a ~2.8 nm BN layer is confirmed by a series of techniques, including X-ray …
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FABRICATION AND OPTICAL RESPONSE OF SILVER NANOWIRE METAMATERIALS
Metamaterials have become an important area of research due to the freedom they can potentially provide in designing the optical response of a material. Engineering of the electromagnetic subunits means that the optical constants of a fabricated medium are not restricted to the limits encountered …
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A framework for damage modeling in multi-constituent laminated materials
… work contains analysis of directionally oriented material with heterogeneity across the spacial domain, between materials, and over time. Composite material containing directionally oriented material have become a necessity in the world of structural, mechanical, aerospace, and material …
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Engineering Band Structures in Correlated Oxides
… in them. The electronic structure of two parent materials are coherently blended at the interface, and the spin ordering is strongly modified. This method of producing meta materials is a promising new way of material engineering.
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Mesomatters - design, manufacture and interact with architected mesoscopic materials
… which operates at the macro scale (cm to m), and material engineering, which operates at the micro/nano scale ([mu]m to nm), is the emerging design space of the mesoscale. While the definition of mesoscale varies across disciplines, mesoscale materials are usually considered to be in between the …
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Advancing sustainability in additive manufacturing: material formulation and process development for recycled PET and PET/HDPE blend
… limiting its application in high-performance materials, because of deteriorating of r-PET properties. to address the issue of reprocessing and recycling of PET or tedious sorting for waste management, this study employs a state-of-the-art approach to develop sustainable feedstock materials for …
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Development of Open-Source Software for Repeatable Processing of Mechanical Test Data
… that test for the mechanical properties of materials typically generate large amounts of raw data that must be cleaned and processed before meaningful analysis can be performed. Manual processing of this data is often time-consuming and susceptible to errors. Furthermore, the necessary …
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Fabrication of Graphene-Based Composites via High-Pressure Homogenisation and Their Characterisation
… not only offer novel insights into composite material engineering but also open up new opportunities for innovative applications in various industries.
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Degradation of the beta-alumina electrolyte in a zebra cell
Beta-alumina solid electrolytes studied were subjected to charge and discharge cycles in a secondary, high energy density Na/beta-al~mina/NaA1Cl 4/FeC1 2 cell (known as the Zebra cell) at 250 c. These electrolytes were studied by means of optical microscopy, as well as SEM and EDS analyses to …
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Multi-layer, Low-crosstalk Integrated Optical Switches
… optical switching systems through advanced material engineering (e.g., low-loss SiN waveguides with optimized adiabatic tapers) and hybrid modulation schemes combining electro-optic and thermo-optic tuning. Additionally, we aim to integrate fault-tolerant control algorithms and machine …
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The tin-vacancy centre in diamond: a coherent spin-photon interface for quantum network nodes
… of the spin bath, allowing us to understand material engineering challenges for next-generation devices. The crystal strain suppresses phonon-induced dephasing processes, enabling coherence times of up to 223(10) μs at 4 K, a record-value for group IV colour centres. For a low-strain …
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Multiscale Mechanics of Graphene Oxide and Graphene Based Composite Films
… of GO, can provide fundamental support for material engineering. In this thesis, an experimental coupled with simulation approach was used to study the multiscale mechanics of graphene oxide (GO) and the methods developed for GO study are proved to be applicable also to mechanical study of …
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A Nuclear Magnetic Resonance Approach Towards Understanding Surface Modification and its Influence on Ni-rich Layered Oxides in Li-ion Batteries
… layered oxides are the state-of-the-art material of choice, offering high practical capacities. However, accessing this high capacity induces structural degradation and parasitic electrolyte reactions at the surface. One strategy to mitigate this problem is surface modification with …
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Towards single Ce ion detection in a bulk crystal for the development of a single-ion qubit readout scheme
… previously demonstrated. Thirdly, no special material engineering is required, and the crystal is commercially available. Ways of initializing a sub-ensemble of Pr ions as a qubit in the random system, manipulating the quantum state of the ions in a controlled way, and characterizing the …
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Mechanical self-assembly of deformed 2D materials for advanced functionalities
… three-dimensionality to two-dimensional (2D) materials opened new possibilities and novel applications in material system design. Extraordinary intrinsic properties of 2D materials have attracted scientific research communities, and various 2D material – based structures and devices have been …
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Aerosol-Jet Printed Nanocomposites for Flexible and Stretchable Thermoelectric Generators
… generators (TEGs) based on thermoelectric (TE) materials, is predicted to be one of the most promising renewable energy solutions of the future. TE materials produce a current when subjected to a temperature gradient as a result of the Seebeck effect, and are characterised by a TE figure of …
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Quantum Chemical Studies for the Engineering of Metal Organic Materials
<p>Metal Organic Materials (MOM) are composed of transition metal ions as connectors and organic ligands as linkers. MOMs have been found to have high porosity, catalytic, and optical properties. Here we study the gas adsorption, color change, and non-linear optical properties of MOMs. These …
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Expanding the Palette: Synthesizing Microencapsulated Organic Phase Change Materials in Metallic Matrices for Transient Thermal Applications
… system overdesign.</p> <p>Phase change materials (PCMs) are heat mitigation materials for transient conditions. These materials can maintain a nearly constant temperature during the phase transformation of pure or eutectic substances,which are used as thermal buffers in electronic …