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 11 of 11 for “"Ion-Doping"”.
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Thermal and low-energy ion doping of silicon(001) during molecular beam epitaxy: Dopant incorporation kinetics and mechanisms
Thermal and accelerated-ion doping, with In and Sb, during Si(001) molecular-beam epitaxy were investigated as a function of growth temperature T$\sb{\rm s}$ (500-1050$\sp\circ$C), dopant energy E$\sb{\rm d}$ (thermal-500 eV), and Si deposition rate R$\sb{\rm Si}$ (0.18-4.7 $\mu$m h$\sp{-1}).$ …
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Residual lattice defects in silicon(100) films doped with low-energy positive boron and positive arsenic ions during growth by molecular-beam epitaxy: Variation with ion energy and growth temperature
… 1000 eV $\sp{11}$B$\sp+$ and $\sp{75}$As$\sp+$ ions during growth by molecular-beam epitaxy (MBE) at temperatures of 800, 650, and 500 $\sp\circ$C. Photoluminescence (PL) and deep level transient spectroscopy (DLTS) were used to assess optical and electronic film quality by identifying and …
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Impurity Incorporation and Redistribution During the Growth of Single-Crystal Semiconductors by Molecular Beam Epitaxy: A Theoretical and Experimental Study
… theoretical results are presented for segregation of dopants in single-crystal semiconductors grown by molecular beam epitaxy (MBE). Experimental results include Sn doping of GaAs, Si doping of Ga(,x)Al(,x)As (where x ranges from 0 to 1), Zn-ion doping of GaAs, In doping of Si, and In and As …
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Chemical Studies of Coulombic Complexations in Polymers
… of complexes produced from coulombic interaction between a polymer and a monomeric ion (monoion) as well as between two polyions. For the polymer-monoion complexation, a poly(crown ether) (PCE), is studied in the form of an ion-doped polymer. The experimental work was aimed at understanding …
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Investigation of magnetic interactions in topological insulators
… phases in condensed matter with inverted conduction and valence bands, which is protected by time reversal symmetry. As a result, the bulk keeps insulating while the surface supports an exotic high-mobility spin-polarized electronic states. Introducing magnetism into topological insulators will …
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Processing, Structure and Properties of High Temperature Thermoelectric Oxide Materials
… energy harvesting has attracted much attention recently. In order to achieve stable operation at high temperatures there is emerging need to develop efficient and oxidation-resistant materials. Most of the well-known materials with high dimensionless figure of merit (ZT) values such as …
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Growth by radio frequency sputtering and characterisation of rare earth doped wide bandgap oxides
… of an experimental research on rare earth ion-doping effects on the structural, chemical, optical and near-infra-red photoluminescence properties of wide band gap oxide films. The aim of the work was to develop materials with good photoluminescence properties, which can be applied to …
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High-nickel layered oxide cathodes for high-performance lithium-ion batteries
… surging demand for higher-energy-density lithium-ion batteries (LIBs). Since cathode materials primarily dictate the energy density and cost, extensive investigations have been devoted to exploring advanced cathodes for high-performance LIBs. High-nickel layered oxides LiNi [subscript x] M …
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Design and Optimization of Angiogenic, Antibacterial Si-Zn-Hydroxyapatite for Use as Filler Particles in Polycaprolactone Nanocomposites
… biomaterials that replicate the biological functionality and mechanical resilience of native bone remains a central challenge in tissue engineering. Hydroxyapatite (HAp) is a widely used osteoconductive ceramic, but clinical outcomes can be limited by relatively low levels of bioactivity, …
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Macroporous Semiconductors Tantalum Oxide, (Oxy)nitride and Nitride for Photocatalytic Hydrogen Evolution
… the serious climatic consequences of CO2 pollution and increasing global energy demand, a clean and sustainable energy source is required. Perhaps the ideal clean fuel is hydrogen, which would be sustainable if it could be sourced efficiently from water. Photocatalysis using metal-semiconductor …
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Macroporous Semiconductors Tantalum Oxide, (Oxy)nitride and Nitride for Photocatalytic Hydrogen Evolution
… the serious climatic consequences of CO2 pollution and increasing global energy demand, a clean and sustainable energy source is required. Perhaps the ideal clean fuel is hydrogen, which would be sustainable if it could be sourced efficiently from water. Photocatalysis using metal-semiconductor …