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 21 for “"P-Si"”.
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Development of enzymatic biofuel cell based on carbon nanotube electrodes on porous silicon
The work presented in this thesis has focused on designing and characterizing biofuel cell electrodes using porous silicon (p-Si) as the substrate or current collecting platform on which carbon nanotubes (CNTs), both single-walled carbon nanotubes (SWNTs) and multi-walled carbon nanotubes (MiWNTs), …
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Graphene Field-Effect Transistors on p-doped Semiconductors for Photodetection
Recent advancements in photodetection using 2D materials suggest significant improvements in the performance of photodetectors. Among these, graphene field-effect transistors (GFETs) have demonstrated promising enhancements in photodetection, characterized by low noise, broad-spectrum response, …
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Energieeintrag langsamer hochgeladener Ionen in Festkörperoberflächen
… elektronischer Strukturen (Cu, n-Si, p-Si und SiO2 ) verwendet. Im Falle der Kalorimetrie wird festgestellt, dass die eingetragene potenzielle Energie linear mit der inneren potenziellen Energie der Ionen wächst. Dabei bleibt das Verhältnis zwischen der eingetragenen potenziellen …
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Performance evaluation of Photovoltaic (PV) modules under different deployment conditions
The purpose of this thesis is to evaluate the performance of solar modules, comprising various PV technologies, subject to different climatic conditions. The assessed PV technologies comprises of commercially available technologies and included Cadmium Telluride (CdTe), Copper Indium diSelenide …
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Porous Silicon as a Proton Exchange Membrane for Direct Methanol Fuel Cells
… in efficient chemical to electrical energy conversion having approximately half the specific energy compared to gasoline at 5.54 kW-hr/kg (19.9 MJ/kg). With a density of 0.792 kg/L, methanol?s energy density is 4.39 kW-hr/L. By designing a system to utilize methanol, the advantages from quick …
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Multiscale Modeling of Effects of Solute Segregation and Oxidation on Grain Boundary Strength in Ni and Fe Based Alloys
… their high mechanical properties and high corrosion resistance. To understand the radiative and corrosive environment influence on the mechanical strength, computer simulation works are conducted. In particular, this dissertation is focused on multiscale modeling of the effects of …
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Coupled mechanochemical theories for reacting systems with application to nanovoid nucleation and Li-ion batteries
… The results show that the core is under compression (which eliminates fracture hypothesis) which promotes void nucleation by decreasing equilibrium concentration of vacancies at the void surface.</p> <p>Si is a promising anode material for Li-ion batteries, since it absorbs large amounts of Li. …
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Structural and magnetotransport study of SrTiO3-δ/Si structures grown by molecular beam epitaxy
SrTiO3 (STO) films were grown on p-Si (001) substrates using molecular beam epitaxy (MBE). Oxygen vacancies were introduced by controlling the Oxygen Pressure (PO2) that varied from 10-8 to 10-7 torr during growth, resulting in SrTiO3-δ with δ ~ 0.02% for the lowest pressure. The single phase …
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Sputter deposition and characterization of metal sandwiched indium tin oxide/silicon for solar cell application
… applications due to their high optical transmission and good electrical conductivity. Because of the rapid advancement of optoelectronic devices, new ITO design and structures are required to improve their performance for use in advanced applications. In this work, multilayer films structures of …
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Replacing Sp2 Hybridized Carbon Centers with Phosphorus
… hypervalent states and can form bonds with up to six other atoms. Apparent patterns in the bonding and reactivity of carbon and phosphorus compounds typically manifest when these elements are in lower coordination environments (bonded to few other atoms). Molecules featuring low-coordinate earth …
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Etching of Silicon, Silicon Nitride, and Atomic Layer Etching of Silicon Dioxide using Inductively Coupled Plasma Beams
Selective, anisotropic etching of silicon nitride (SiN) over Si or SiO2 is vital for fin field-effect transistor (FinFET) fabrication. Anisotropic etching with high selectivity of SiN over Si, and moderate selectivity over SiO2, can be achieved by ion-assisted etching using hydrofluorocarbon gases, …
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High-Sn-content GeSn Alloy towards Room-temperature Mid Infrared Laser
<p>Si photonics is a rapidly expanding technology that integrates photonic circuits onto a Si substrate. The integration of Si electronics and photonics has been a successful technology for a wide range of applications. Group-IV alloy GeSn has drawn great attentions as a complementary …
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Aspects of the chemistry of some stony meteorites
[pg 20,67 missing] Ten eucrites, four howardites, three enstatite achondrites, eight HL chondrites, the one known chassignite and a chondrite inclusion from the Cumberland Falls achondrite have been analysed for major, minor and some trace elements (viz. Fe, Mn, Ca, Cr, P, Si, Al, Mg, Na, K, Sr, …
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Photo-Assisted Etching in Halogen Containing Plasmas
… to precisely pattern feature with lateral dimensions of <10 nm. To advance this capability to etch layers with atomic fidelity, while also achieving ultra-high material selectivity, low ion energies (10s eV) are required. However, at low ion energies, an alternative etching pathway catalyzed by …
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Bond Formation Reactions to Phosphorus Using an Electrophilic Phosphinidene Complex
… organophosphorus chemistry. The chemistry of transient phosphinidene complexes has been well studied, but stable, cationic phosphinidene complexes are not as well understood. Therefore the reactivity of a cationic phosphinidene complex [CpFe(CO)2{PNiPr2}]+ (Cp = η5-cyclopentadienyl, iPr = …
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Thermal Stability of Al₂O₃/Silicone Composites as High-Temperature Encapsulants
… and power electronic packages based on Si devices usually work below 150°C. The emergence of wide-bandgap devices, which potentially operate above a junction temperature of 250°C, results in growing research interest in high-density and high-temperature packaging. There are …
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Estudio del proceso fermentativo en la elaboración de salsas de pescado tipo garum producidas en Baelo Claudia
… la época romana, no solamente por su producción sino también por la calidad de sus productos. De hecho, su barrio pesquero es uno de los mejor conservados en el ámbito atlántico-mediterráneo, existiendo dentro de ella un gran número de cetariae o fábricas de salazones y garum que debieron haber …
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Microplasma-driven, atomic layer deposition of flexible electronic and photonic nanofilms
Atomic Layer Deposition (ALD) of aluminum oxide (Al2O3), gallium oxide (Ga2O3) and Zirconium oxide (ZrO2), driven by arrays of microcavity plasmas (MALD), has been demonstrated. Microplasma has been drawn attention due to its unique characteristics such as high electron density (>1016 cm-3), low …
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Bioprospecting of plants species with potential to uptake inorganic chemical species from gold mine tailings and acid mine drainage
… water during and after the extraction of ore deposits which results in the formation of acid mine drainage (AMD). Acid mine drainage is characterised by low pH ranging between 1-4, high concentration of sulphate and chemical species which degrade the water quality and threaten the life of …
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