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 30 for “"Electron Energy Loss Spectroscopy (EELS)"”.
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Surface decomposition studies of trimethylgallium on silicon(100)
… fundamentally and industrially important in microelectronics processing. In this study, the decomposition of trimethylgallium (TMG) on silicon (100) was investigated using thermal desorption spectroscopy (TDS), x-ray photoelectron spectroscopy (XPS), infrared spectroscopy (IR), and electron energy …
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Structure Sensitivity of Ethylene Adsorption on Platinum (Dehydrogenation)
… Temperature Programmed Desorption (TPD), Electron Energy Loss Spectroscopy (EELS), Low-Energy Electron Diffraction (LEED) and Auger spectroscopy are applied to study the adsorption of ethylene on the square (1 x 1)Pt(100) and on the pseudo-hexagonal (5 x 20)Pt(100). A model based on the …
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NANOPATTERNING OF FREE-STANDING VAN DER WAALS HETEROSTRUCTURES USING CHARGED PARTICLES
… new opportunities in nanophotonics and optoelectronics. However, achieving such confinement with high spatial and depth resolution in stacked van der Waals heterostructures remains challenging. In this thesis, we demonstrate selective nanopatterning of free-standing hBN-encapsulated graphene …
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A Study of Amorphous Hydrogenated Titanium-Carbide Films: Structure, Stability, and Role of Hydrogen Doping
… compound tetraneopentyl-titanium. X-ray and electron diffraction studies confirmed the amorphicity of the coatings, while controlled-heating experiments emphasized their stability against crystallization to higher temperatures ((TURN)1100(DEGREES)C) than typical glassy metals. Analyses of the …
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Probing nano-scale atomic and electronic structures of iron-based superconductors
… in these materials. Investigating atomic and electronic structures is thus essential to help understand their interesting properties. In this thesis, I have investigated the bulk and thin-film form of iron-based superconductors by using a combination of scanning transmission electron …
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Electron Energy Loss Spectroscopy and Optical Properties of Plasmonic Nanostructure
… incompressible self-oscillation of conducting electrons in small nanoparticles. A classical spring model could be used to describe plasmon’s behavior. Many different techniques have been applied to understand nanostructure’s plasmonic properties. Electron energy loss spectroscopy (EELS) is one …
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Gold-containing bimetallicnanoparticles
… structure, chemical configuration, and electronic properties of 38 atom Cu-Au and 40-atom Pt-Au nanoparticles. Experimental Cu Au and Pt-Au nanoparticles are synthesized by wet-chemical methods: the two-phase method combined with a galvanic exchange procedure (dodecanethiol-stabilized …
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Electron-beam lithography towards the atomic scale and applications to nano-optics
Electron-beam lithography (EBL) is a high-resolution pattern generation technique widely used in research and development. However, EBL resolution has been limited to 4 nm isolated features and 16 nm periodic structures. Furthermore, the physical mechanisms that limit EBL resolution are not …
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Electron spectroscopic characterization of corrosion reactions of active metal systems.
… has been studied primarily with X-ray Photoelectron Spectroscopy. First, the interaction of metallic lithium thin films with simple glass surfaces was investigated. Li was deposited on SiO₂, sodium silicate, potassium silicate, and B₂O₃ glasses in an ultra-high vacuum deposition and analysis …
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Probing interfacial electronic structure in quantum materials using stem cathodoluminescence spectral imaging
… and local electromagnetic fields to optical and electronic responses at precise locations where quantum entanglement resides. The demands for such measurements range from the detection of defect centers and excitons supplying single photons for quantum networking to the characterization of …
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Utilizing Electron Microscopy And Spectroscopy Methods To Understand Water Structure And Water Doping
… different water types were characterized using electron energy loss spectroscopy (EELS) within a transmission electron microscope (TEM). Prior to characterizing water vapor, the measurement method for in-situ gas analysis was developed using pure gases. Water samples were also characterized …
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CRYOGENIC MICROSCOPIES OF ENERGY STORAGE MATERIALS: INSIGHTS INTO METAL ANODES, SOLID-ELECTROLYTE INTERFACES, AND MXENES
The escalating global energy demand has intensified the pursuit of high energy density storage technologies, focusing on metal anode systems that promise higher energy density at lower cost. This dissertation presents comprehensive research that advances our understanding of energy storage …
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Synthesis and development of boron nanotubes and metal/ceramic-carbon nanotube composites
… been carried out using field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) coupled with energy dispersive x-ray spectroscopy (EDS), electron energy loss spectroscopy (EELS) and Raman spectroscopy. The BNTs mixed with BNFs produced have a diameter of 10 nm …
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Fabrication and Characterization of Aluminum Nano-Carbon Composites and Investigation of Their Electrical Conductivity
… others. Raman mapping measurements, X-ray Photoelectron Spectroscopy (XPS), Transmission Electron Microscope (TEM) and Electron Energy Loss Spectroscopy (EELS) have confirmed that carbon is incorporated more uniformly and forming ordered network of graphitic structures in Aluminum matrix. Both …
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Structural and electronic properties of noble metals on metal oxide surfaces
… vacuum techniques to investigate the morphology, electronic structure, and surface reactivations of clean metal-oxide/metal nanocluster interfaces in ideal conditions. The systems we chose are Ag/TiO2, a popular photocatalyst, and Cu/ZnO, recently a hot candidate for liquid fuel production. The …
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Microscopic Study of Structure, Chemical Composition and Local Conductivity of La2/3Sr1/3MnO3 Films
The colossal magnetoresistance (CMR) manganites have attracted intensive study due to their richness of underlying physics and potential technological applications. Of particular interest is half-metallic La2/3Sr1/3MnO3 (LSMO) because it possesses the highest known Curie temperature of the group ~ …
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Survival of Brown Colour in Diamond During Storage in the Subcontinental Lithospheric Mantle
… 30–60 vacancies. Positron annihilation lifetime spectroscopy (PALS) and electron energy loss spectroscopy (EELS) support such vacancy clusters as the cause of brown colour. Brief treatment in a high-pressure–high-temperature (HPHT) vessel at 1800–2700 °C can destroy the brown colour. There has …
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Nanoscale Carbon Architectures for Electrode Applications
… produced were studied using Transmission Electron Microscopy (TEM) and Scanning Electron Microscopy (SEM), while the crystalline structure and relative percentage of crystalline material was analyzed by X-ray Powder Diffraction (XRD) and Temperature Programmed Oxidation (TPO) methods. …
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Formation and growth of irradiation-induced defect structures in ceria
… of primary concern for materials used in nuclear energy production. In this study, emphasis was given to the processes of formation and growth of radiation-induced defect structures in oxide fuels. Due to the natural complexity of oxide fuels, which consist of both a metal sublattice and an oxygen …
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A study of amorphous hydrogenated titanium carbide films: Structure, stability, and role of hydrogen doping
… compound tetraneopentyl-titanium. X-ray and electron diffraction studies confirmed the amorphicity of the coatings, while controlled-heating experiments emphasized their stability against crystallization to higher temperatures (-1100°C) than typical glassy metals. Analyses of the coatings by …
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