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 34 for “"HFO"”.
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Deposition and characterization of HfO₂ thin films
Hafnium Dioxide(HfO₂) thin films were deposited on glass, metal, and silicon wafer substrates using magnetron RF reactive sputtering techniques. Structure and morphology of the thin films were investigated by x-ray diffraction (XRD), transmission electron microscopy (TEM) and scanning electron …
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Estudo da estabilidade termodinâmica de filmes ultrafinos de HfO/sub 2/ sobre Si
… de argônio e oxigênio, de filmes ultrafinos de HfO2 depositados pelo método de deposição química de organometálicos na fase vapor (MOCVD) sobre Si, contendo uma camada interfacial oxinitretada em NO (óxido nítrico). A caracterização foi realizada utilizando-se técnicas de análise por feixes de …
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Adsorption and co-precipitation of heavy metals on hydrous ferric oxides (HFO) from acidic waters
… — 5.8) and in coexisting hydrous ferric oxides (HFO). Samples were collected from two sites, McAdoo, PA (acid mine drainage, AMD) and the Wharton State Forest (WSF), NJ (naturally acidic region). At McAdoo, Fe, Ni, Cd, and Mn concentrations exceeded USEPA and U.S. Public Health Service drinking …
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Physiological High-Frequency Oscillations in Scalp EEGs Change During Brain Maturation
High-frequency oscillations (HFOs), occurring between 80-1000 Hz, were first identified only three decades ago. Since then, physiological HFOs have been implicated in learning, memory and motor function, while epileptic HFOs have been associated with epileptogenic tissue. Many studies have shown …
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Characterisation and analysis of a corona-stabilised switch filled with environmentally-friendly gas mixtures
… in order to test a novel gas in pulsed power, HFO-1234ze, in mixtures with N2, used as a buffer gas. Thus, decreasing the global warming potential (GWP) of the switching medium from 23900 in SF6 to 6 in HFO-1234ze. The performance of the gas was measured in a specific corona-stabilised switch …
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Design Of Functional Dendrimer Nanocarriers And Their Formulations In Propellant-Based Inhalers For Pulmonary Drug Delivery
… stabilization of suspension formulations in HFO-based propellants. Using a combination of tools including ab initio calculation, molecular dynamics simulation and high pressure tensiometry, potential fluorocarbon-philic moieties were systematically screened. Surfactants with those chemistries …
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Investigation of High Frequency Oscillations in Epilepsy Using Computational Intelligence
… onset zone (SOZ). High frequency oscillations (HFOs, 80 - 500 Hz) are proposed as putative biomarkers in epilepsy with their potentials of identifying the SOZ, either by augmenting or replacing the current preoperative evaluation modality which requires detained visual examination of long-term …
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Tribology of engineering and coated materials in the presence of environmentally friendly refrigerant
… the candidate refrigerants, newly developed HFO-1234yf is considered as a direct substitution for the current R-134a refrigerant for possessing similar thermo -physical properties. However, in an actual system, a refrigerant circulates through different tribo-components where it interacts …
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Photoluminescence from Defects in Two-Dimensional Transition Metal Dichalcogenides
… observed on SiO<sub>2</sub> and hBN, but not on HfO<sub>2</sub>. When the MoS<sub>2</sub> is first annealed on SiO<sub>2</sub> and then transferred onto HfO<sub>2</sub>, the LX<sub>D</sub> emission is present on untreated HfO<sub>2</sub>, but not on annealed HfO<sub>2</sub>. These results suggest …
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Using multiplexers to study the statistics of quantum phenomenon in one-dimensional wires
… factor ($g^*$) and high-field offset ($\Delta E^{hfo}$) in numerous devices in a single cooldown at T=40 mK. The statistical results show both the $g^*$ and $\Delta E^{hfo}$ increase with the potential confinement, which supports the predictions about the role of interaction strength on $g^*$ and …
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Interfaces between two-dimensional transition metal dichalcogenide semiconductors and oxide dielectrics for transistors
… shown that common gate oxides such as SiO₂ and HfO₂ strongly dope 2D MoS₂ and other 2D TMDs. XPS shows significant band bending of 1.2 eV at the interface between MoS₂ and SiO₂. The band bending at the MoS₂/HfO₂ interface is 0.4 eV. Raman spectroscopy shows a redshift in A1g mode of MoS₂ on HfO₂ …
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Characterizing phosphate desorption kinetics from soil : an approach to predicting plant available phosphorus
… tubes filled with hydrous ferric oxide (DMT-HFO) has recently been reported as an effective way to characterize P desorption over a long-term in laboratoty studies. However, there is little information on the relationship between kinetics of P release using this new method and plant P uptake. …
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A practical high temperature photonic crystal for high performance thermophotovoltaics
… to fabricate large-area samples; by developing a HfO₂ passivation coating for improved thermo-chemical stability; and by developing a HfO₂ cavity filing process for improved omnidirectional performance. More specically, we developed a process for fabrication of uniformly patterned 50 mm diameter …
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Self-aligned AlGaN/GaN transistors for sub-mm wave applications
… of tungsten and a high-k dielectrics like HfO₂, A1₂O₃ and HfO₂/Ga₂O₃, were studied and compared with respect to DC transistor measurements, capacitor measurements and pulsed-IV measurements. Not only did these transistors survive the ohmic anneal but they showed superior performance with …
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Next-Generation Flash Memories Using Two-Dimensional Materials
… Silicon dioxide (SiO₂) and Hafnium dioxide (HfO₂) are the two oxides explored as the top control oxide of the device.
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Floating gate engineering for novel nonvolatile flash memories
… nanocrystals or ruthenium nanocrystals buried in HfO₂ as charge storage nodes, high interface quality has been achieved, leading to promising memory device performance. Next, another crucial challenge for nanocrystal flash memory on how to deposit uniformly distributed nanocrystal matrix in good …
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UNSUPERVISED CLASSIFICATION OF HIGH-FREQUENCY OSCILLATIONS IN NEOCORTICAL EPILEPSY AND CONTROL PATIENTS
… (100-500 Hz) field-potential oscillations (HFOs) are emerging as a candidate biomarker for epileptogenic networks, but quantitative HFO studies are hampered by selection bias arising out of the need to reduce large volumes of data in the absence of capable automated processing methods. In …
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Non-silicate porous glasses obtained by the leaching of borate-rich glasses
… made where X and Y are two of the oxides CeO₂, HfO₂, ThO₂,Y₂O₃,ZrO₂ or Ga₂O₃. The glasses were either quenched or heat treated to promote phase separation and/or crystallization. The materials were subsequently leached in distilled water for periods of up to 96 hours. Leaching resulted in porous …
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Microfabrication of silicon tips for scanning probe microscopy
… designed; the tip consists of a multilayer Si/Au/HfO\(-2\)/Au structure. The outermost Au layer is grounded. SPELS spectra of graphite were successfully obtained for the first time. Third, a multilayered tip was fabricated for the Scanning Probe Electron AnalyseR.. This approach is a combination …
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