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 62 for “"Dielectric constants"”.
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Effect of Pressure on the Luminescence of 3-Hydroxyflavone, Indole and Rhenium Complexes
… covering a wide range of viscosities and dielectric constants were used. Radiative and nonradiative rates were calculated from steady state emission and lifetime experimental data.
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Size-binary Zincblende: A Colloidal Approach to Omnidirectional Photonic Bandgaps
… spheres having independently variable radii and dielectric constants. Electromagnetic calculations implemented in the MIT Photonic Bands package (MPB) are used to compute the dispersion relations and determine the size and location of complete photonic bandgaps as a function of the structural and …
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Design, fabrication and application of a dedicated thick-film hybrid time domain reflectometer
… given to the problem of characterizing material dielectric constants using delay measurements.
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The Partial Pressure of Hydrogen Chloride Above its Solutions in Non-Aqueous Solvents, in Monohalobenzene Solutions
… most important factors to be considered is the dielectric constant of the medium. However, in the case of acids, it would seem from the viewpoint of the Bronsted concept that the basicity of the solvent is of primary importance and the dielectric constant secondary. This prediction is shown to …
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Synthesis and Characterization of Polymer Composite Materials For Lithium Battery Cathodes and Capacitors
… second part of the dissertation reports on the dielectric characterization of polystyrene composites containing a variety of titanates, aluminates, and novel mixed metal phosphonates. We investigated BaTiO3 materials, covalently surface-modified BaTiO3, and novel mixed metal phosphonates, …
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Consistent approach for calculating protein pKa's using Poisson-Boltzmann Model
… major challenge is to determine the appropriate dielectric constant that best describes the heterogeneous protein environment. The common use of a single large dielectric constant often fails to reproduce large experimental pKa shifts of biological important residues. In this study, I implemented …
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Chemical vapor deposition of fluorocarbon films for low dielectric constant thin film applications
… fluorocarbon films with the potential use as low dielectric constant interconnect materials in microelectronic circuits. Solid-state nuclear magnetic resonance spectroscopy was demonstrated as a valuable film characterization tool to understand structure-property processing fundamentals, …
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Novel electromagnetic radiation in Left-Handed materials
… upon the configuration and the relative dielectric constants of the surrounding normal material (we call them RHM in comparison with LHM), a surface wave can be formed.
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Synthesis and Characterization of Thermosetting Polyimide Oligomers for Microelectronics Packaging
… (6FDA), reduced water absorption and lowered the dielectric constant relative to non-fluorinated polyimides in the series. When flexible ether linkages were incorporated in the repeat unit by using 4,4'-oxydianiline (ODA), relatively more ductile solvent-cast films were obtained from oligomers …
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High temperature nanofoams based on ordered polyamide matrices
… in a search for materials with extremely low dielectric constants while maintaining the desirable thermal and mechanical properties. In the past, the incorporation of fluorine into polyimides has been shown to decrease the dielectric constant. In this research, the concept of a foamed …
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Polaritonics : an intermediate regime between electronics and photonics
… of the excitation pulses. Due to the high dielectric constants of these crystals, phonon-polaritons travel in a predominantly lateral direction away from the excitation region. Lateral propagation is further facilitated by employing crystals whose thickness is on the order of the …
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Pool and flow boiling of novel heat transfer fluids from nanostructured surfaces
… these fluids are chemically stable and have low dielectric constants, they are plagued by poor thermal properties. These factors necessitate the development of new heat transfer fluids with improved heat transfer properties and applicability. Computer Aided Molecular Design (CAMD) approach was …
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Towards stimuli-responsive functional nanocomposites: smart tunable plasmonic nanostructures Au-VO2
… A reversible thermal tunability of the optical/dielectric constants of VO2 thin films by spectroscopic ellipsometry has been intensively also studied in order to bring more insights about the shift of the plasmon of gold nanoparticles imbedded in VO2 host matrix.
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Ultra-high Mobility 2DEG Heterostructure Fabricate by Oxide Molecular Beam Epitaxy for Device Application
… and SrTiO3 are stable insulators with high dielectric constants and bandgaps over 3eV, making them suitable for power electronics and transparent optical devices. The synthesis of the 2DEG interface is typically achieved through epitaxial growth by Pulsed Laser Deposition (PLD), with a lack …
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Non-Silicon MOSFETs and Circuits with Atomic Layer Deposited Higher-k Dielectrics
… has now called for research on higher-k gate dielectrics integration with high mobility channel materials such as III-V semiconductors and germanium. Ternary oxides, such as La2-xYxO3 and LaAlO3, have been considered as strong candidates due to their high dielectric constants and good thermal …
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OXIDATION AND REDUCTION SYNTHESIS OF SURFACE ENHANCED TITANIUM-BASED ELECTRODES FOR ELECTROLYTIC CAPACITORS
… in spot welders. Titanium-based oxides with high dielectric constants are candidate for the dielectric layer in electrolytic capacitors. The research in the thesis focuses on fabrication methods to form surface-enhanced titanium-based electrodes with sub-micrometer branch and pore sizes for highly …
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Moisture measurements in concrete and characterization using impedance spectroscopy and RC network circuits
… durability. A moisture sensor based on the dielectric and resistive properties of cement paste was developed. Impedance spectroscopy techniques are used to explore the moisture behavior in relation to dielectric and resistive properties of the sensors. The sensor capacitive response is …
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Brillouin scattering from opaque semiconducting alloys and thin films
… used to derive information on the elastic and dielectric constants of AlxGal_xAs alloys. The surface acoustic wave velocities along the [100] and [110] axes were measured for a number of aluminum concentrations. In samples that were transparent to the exciting laser frequency, a leaky surface …
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