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 52 for “"hybrid structures"”.
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Hybrid structures for molecular level sensing
… silicon based microsensors resulting in a novel hybrid organic/inorganic materials platform for microfabricated MEMS sensors with record performance far beyond contemporary sensors in terms of detection sensitivity to various environments. The results produced in this research show thermal …
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Carrier manipulation in graphene/ferroelectric hybrid structures
… with ferroelectric oxides are identified. The hybrid devices fabricated so far suffered from extrinsic hysteresis effects from adsorbed molecules screening any coupling between the graphene charge carriers and the ferroelectric polarization. The experimental methods utilized to overcome these …
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Integrated Sinc Method for Composite and Hybrid Structures
Composite materials and hybrid materials such as fiber-metal laminates, and functionally graded materials are increasingly common in application in aerospace structures. However, adhesive bonding of dissimilar materials makes these materials susceptible to delamination. The use of integrated Sinc …
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Graphene, layered materials and hybrid structures for advanced photodetectors
… with gate-tunable graphene/MoS$_2$ heterostructures and show responsivity up to 45A/W, 82\% transparency, and low voltage operation (-1V). The responsivity is two orders of magnitude higher compared to semiconducting flexible membranes. Graphene/MoS$_2$ photodetectors can be bent without …
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Majorana-based Topological Quantum Algorithms in Magnet-Superconductor Hybrid Structures
… protected quantum devices. Magnet-superconductor hybrid (MSH) systems have proven to be an experimentally versatile platform for quantum engineering the emergence of topological superconductivity and the associated Majorana modes. In this dissertation, I will show how the exotic phase of …
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Micromagnetic modelling and magneto-optical characterization of Ni/V2O3 hybrid structures
Magnetic behaviour of five bi-layer V2O3/Ni thin film samples sputtered on sapphire, Al2O3, were investigated using MOKE (magneto-optic Kerr effect). Three samples show a fourfold symmetry in coercivity with very small but similar change in magnetic remanence. For comparison micromagnetic …
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Design of Si/SiC hybrid structures for elevated temperature micro-turbomachinery
… efficiency. Previous studies have shown that hybrid structures of silicon and silicon carbide have good potential for improved engine performance. Detailed design of Si/SiC hybrid structures for high temperature micro-turbomachinery, however, has been hampered by the relatively poor …
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Comprehensive Multi-Scale Progressive Failure Analysis for Damage Arresting Advanced Aerospace Hybrid Structures
… a leading role in the integration of composite structures. Among the leading concepts to develop lighter, more fuel-efficient commercial transport is the Pultruded Rod Stitched Efficient Unitized Structure (PRSEUS) concept. The highly integrated structure of PRSEUS allows pressurized, …
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Investigations of nonlocal transport and current noise in mesoscopic normal metal-superconductor hybrid structures
Spin-based solid-state quantum computing requires the creation of spatially separated, spin-entangled quantum states. The correlated electronic states in a conventional superconductor can serve as an abundant source of entangled spin-singlet electrons provided Cooper pairs can be split without …
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Let there be (more) light : a study of tungsten based 2D semiconductor-plasmonic hybrid structures
… enhancing the emission of WS₂ and WSe₂ using Ag structures. Two sets of experiments are presented. The first set studied WS₂-Ag structure hybrids. We varied the thickness of a dielectric spacer that is positioned between monolayer WS₂ and a Ag film to observe how it affects the photoluminescence …
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Development of Multifunctional Polymer Nanocomposites with Hybrid Structures for Fabrication of Stretchable Strain Sensing and Wearable Electronic Devices
… were employed to develop novel filler network structures in polymers to improve electrical conductivity and mechanical properties and electromechanical properties and thus strain sensing performances. One dimensional (1D) nanofillers such as carbon nanotubes (CNTs), silver nanowires (AgNWs) and …
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Scanning Tunneling Microscopy and Spectroscopy Measurements of Superconductor/Ferromagnet Hybrids
… magnetically coupled superconductor/ferromagnet hybrid structures using low-temperature scanning tunneling microscopy and spectroscopy (LT-STM/STS) under ultra-high vacuum conditions. There are a number of novel effects that can occur due to the non-homogenous magnetic field from the ferromagnet, …
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Neural-embedded discrete choice models
… of both is the overarching question. I propose hybrid structures and strategies to flexibly represent taste heterogeneity, reduce potential biases, and improve predictability while keeping model interpretability. Also, I utilize neural networks' training machinery to speed up and scale up the …
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Application of system safety framework in hybrid socio-technical environment of Eurasia
… transition of post-Soviet societies have led to hybrid structures in political, economic and technological domains. In such hybrid structures the roles of government, state enterprise, private business and civil society are not clearly defined. These roles shift depending on formal and informal …
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Theory and simulation of magnetism and spin transport in semiconductors
… OF SPIN-TRANSPORT IN FERROMAGNET-SEMICONDUCTOR HYBRID STRUCTURES WHICH TAKES INTO ACCOUNT THE EFFECTS OF INTERFACE RESISTANCE HAS BEEN PRESENTED. SPIN-INJECTION EFFICIENCY AND MAGNETORESISTANCE WHICH ARE THE KEY PARAMETERS IN ANY SPINTRONICS DEVICE ARE STUDIED IN DETAIL. IT WAS FOUND THAT …
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Synthesis, Structure and Properties of Various Carbon Nanomaterials
… investigation of various graphene/nanotube (NT) hybrid structures in Chapter 1, including rebar graphene from functionalized boron nitride nanotubes (BNNTs), growing carbon nanotubes (CNTs) from both sides of graphene, and the selective growth and transfer of seamless three-dimensional (3D) …
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Plasmonic gold nanostructures: optical properties and application in mercury detection
… the application of plasmonic gold nanostructures for mercury detection. Various gold and silver single nanostructures and gold nanostructure assemblies were characterised in detail by correlated single nanostructure spectroscopy and electron microscopy. Several routes for mercury …
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Mechanical self-assembly of deformed 2D materials for advanced functionalities
… communities, and various 2D material – based structures and devices have been proposed and demonstrated. Given the fascinating electrical, optical, and thermal properties of 2D materials, constructing three-dimensional (3D) structures out of 2D materials would make 2D systems even more …
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PHYSICAL CHEMISTRY OF COLLOIDAL-NANOPARTICLE INTERACTIONS
… and industrial interest in designing complex/hybrid structures (micro/macro) by merging the advantageous of inorganic colloidal particles (fixed shape, hard matter) with organic biopolymers (flexible shape, soft matter).In the current dissertation, nanostructured silica suspensions with …
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Synthesis And Evaluation Of Novel Tropane Compounds As Potential Therapeutics For Drug Abuse
… analogues were designed as hybrid structures of the dopamine transporter selective benztropines and the serotonin transporter selective meperidine derivatives.
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