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 445 for “"Transmission electron microscopy (TEM)"”.
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Transmission Electron Microscopy (Tem) Study of Minerals in Coal
… in the micron-size range by using analytical transmission electron microscopy. Specimens were thinned by ion-milling wafers cut from these coals; a cold stage cooled by liquid nitrogen was used to reduce thermal degradation of the minerals by the ion-beam.
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Interfacial Microstructures in Divorced Graphitic Eutectics (Tem, Study)
… graphitic eutectics have been investigated using transmission electron microscopy (TEM). Both systems show a coarse minor precipitate, graphite, whose morphology depends strongly on trace elements.
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Processing - Structure - Property Relationships in Catalyst Cured Epoxy Systems (Morphology)
… addresses the characterization of the low temperature relaxation behavior, glass transition behavior, stress-strain behavior, bulk density and morphology for catalyst cured epoxy systems based on diglycidyl ether of bisphenol A (DGEBA). The methods of thermally stimulated discharge (TSD) …
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Electron microscopy studies in electrical ceramics: Dielectric composites and high critical temperature superconductors
… of dielectric composites in the system BaTiO$\sb3$-NaNbO$\sb3$ by transmission electron microscopy (TEM), with the expressed purpose of determining the interrelationships that exist between chemical composition and thermal processing conditions on microstructure development and …
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Helium-Induced Blistering and Volume Swelling in Nickel
… the microstructure of the implanted region using transmission electron microscopy (TEM). In particular, the volume swelling was measured as a function of the implant depth, and compared to experimental skin thicknesses in order to determine if the skin separated at the maximum volume swelling, or …
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Activity and selectivity of transition metal (Fe, Mo and W) carbides in the Fischer-Tropsch synthesis
… The carbide catalysts were prepared by a temperature programmed method. The properties of the materials were characterised by X-ray diffraction (XRD), transmission electron microscopy (TEM), BET measurements and temperature programmed desorption of carbon monoxide (CO-TPD). The performance …
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Preparation of model cobalt catalysts for Fischer-Tropsch synthesis using ultrasound preparation techniques
… by adjusting the preparation conditions. Transmission Electron Microscopy (TEM) was used to measure the crystallites and to obtain the crystallite size distributions.
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Native Oxides on Aluminum-Bearing Iii-V Semiconductors With Applications to High-Performance Laser Diodes
… using secondary ion mass spectrometry (SIMS) and transmission electron microscopy (TEM). The effect of the semiconductor composition and conductivity type (p/n) on oxidation growth rate is investigated by examining the temperature and time dependence of various Al$\sb{\rm x}$Ga$\sb{\rm 1-x}$As and …
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Development of Ti-Si-N and Ta-Si-N as diffusion barriers
… measurements, X-ray diffractometry (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), auger electron spectroscopy (AES) and annealing in a controlled ambient atmosphere"--Abstract, page iv.
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Nanoscale Hydrogel Films and Polymer Brushes Grafted Onto Nanocapillary Array Membranes for Externally Controllable Size -Selective Molecular Transport
… infra-red (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), while SPR measurements were used to characterize both the synthesis of the hydrogel, as well as to characterize potential-induced volume changes on planar Au surfaces. Scanning electron microscopy (SEM) and transmission …
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Composite poly(dimethoxyaniline) electrochemical nanobiosensor for glufosinate and glyphosate herbicides
… on gold electrode by the electrochemical "template"method using poly(4-styrenesulfonic acid) (PSS) as the dopant and structure-directing molecule. Fourier transform infrared (FTIR) spectroscopy, UV-Vis Spectroscopy, Transmission electron microscopy (TEM) and Scanning electron microscopy …
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A study of dislocation structures in bulk-strained and in situ TEM strained nickel aluminide alloys
… structures in bulk strained and in situ TEM strained alloys of hypo-stoichiometric Ni$\sb3$Al with and without boron, and hyper-stoichiometric Ni$\sb3$Al with boron have been studied. Bulk samples were deformed in tension to 3% and 9% strain and the resulting dislocation structure studied …
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Structure-property relationships in strontium barium niobate relaxor ferroelectrics
… Sawyer-Tower polarization techniques, and transmission electron microscopy (TEM). The dielectric response was found to be strongly dependent on crystallographic orientation, in distinct comparison to the nearly orientation independent response found for Pb-based perovskite relaxors. The …
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Preparation and Evaluation of Oil-in-Water Self-Nanoemulsifying Systems with Potential for Pulmonary Delivery
Self-Nanoemulsifying Drug Delivery Systems (SNEDDS) are mixtures of oil, surfactant and cosolvent/cosurfactant, which emulsify under conditions of gentle agitation. SNEDDS can drastically improve absorption of poorly water soluble drugs by keeping it in solubilized form at the site of absorption. …
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Strain at surface and interface steps
Transmission Electron Microscopy (TEM) is a powerful tool for the study of interface and surface phenomena. Its sensitivity to lattice plane orientation allows for the imaging of crystal strain. In this thesis, I will present a unique method for quantitatively measuring crystal strain using TEM. …
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Structure and properties of titanium nitride-strengthened microlaminate metal matrix composites
… of the composites investigated. Scanning electron microscopy (SEM), cross-sectional transmission electron microscopy (TEM) and scanning Auger electron spectroscopy (AES) have been used to characterize the film morphology, the fracture behavior of the composites, and the nature of the …
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Multiscale modeling of two-dimensional materials : structures, properties, and designs
Multiscale modeling undertakes to describe a system with multiple models at different scales. In principle, quantum mechanics provides sufficient information. However, the development of a scaled-up model, e.g., molecular dynamics, from quantum mechanics, should be validated against the …
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Synthesis and characterization of cadmium selenide and zinc selenide nanoparticles
… spectroscopy (PL), X-ray diffraction (XRD), transmission electron microscopy (TEM) and infrared spectroscopy (FT-IR).
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Kinetics and mechanisms of metal silicide formation
… in situ stress measurement, x-ray diffraction, transmission electron microscopy (TEM), scanning transmission electron microscopy, and Auger electron spectroscopy (AES). Studies of the initial stage of the C49-TiSi$\sb2$ formation during isothermal anneal at 530$\sp\circ$C and anneal at …
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Molecular beam epitaxial growth and characterization of indium antimonide on gallium arsenide
… mechanisms of this highly lattice-mismatched system are detailed. Structural, electrical, and optical properties of the InSb epilayers are characterized by transmission electron microscopy (TEM), X-ray rocking curves, Hall measurements, photoluminescence (PL), and transmission measurements. The …
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