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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 122 for “"Transmission Electron Microscope"”.
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Disordering of small metal particles in a scanning transmission electron microscope
… seen to progressively disorder when the 100 keV electron beam of a Scanning Transmission Electron Microscope (STEM) is held stationary on the particle. The diffraction pattern of the individual particle is seen to progress from an initial array of indexable diffraction spots to a mixture of …
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A nanofabricated amplitude-division electron interferometer in a transmission electron microscope
Wavefront-division electron interferometry with the electron biprism has enabled many applications such as electron holography, exit-wave reconstruction, and demonstration of the Aharonov-Bohm effect. However, wavefront-division interferometry is limited by the requirement of high source coherence. …
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Probing small organic molecules at the angstrom-scale in the scanning transmission electron microscope
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Development of a nanostructure thermal property measurement platform compatible with a transmission electron microscope
… was designed for compatibility with a customized transmission electron microscope (TEM) specimen holder. An in-situ scanning electron microscope pick-and- place technique was developed to select and place an individual nanostructure onto the measurement platform. A through-hole for sample …
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An Ultrastructural Study of Fresh and Ensiled Alfalfa Using the Light and Transmission Electron Microscope
… plastic for examination under the light (LM) and transmission electron (TEM) microscopes. Light microscopy was used to differentiate cell types and tissues, e.g. epidermis, chlorenchyma, phloem, xylem, and pith. Iodine staining (LM) showed starch localization in chlorenchyma cells. Transmission …
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Microstructure Evolution of Two Model Ferritic/Martensitic Steels Under Ion Irradiation In A Transmission Electron Microscope
<p>Ferritic/martensitic steels are candidate materials for structural and cladding components designed for Generation IV reactors because of their superior resistance to radiation damage at the high operating temperatures envisioned in these reactors. To enable the development and optimization of …
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Development of a dynamic environmental transmission electron microscope for the study of light-induced dynamics in nanoscale materials
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-04-06 without embargo terms
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In-Situ Studies of Copper Nanoparticles Using a Novel Tandem Ultra-High Vacuum Particle Production Chamber Transmission Electron Microscope
… connected directly to a ultra-high vacuum transmission electron microscope (UHVTEM), which allows in-situ TEM study of various nano-particle phenomena without exposure to contaminating atmospheres. Using this apparatus, we have shown specific contaminants' effects on copper nano-particle …
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Application of in situ full-field measurement in the transmission electron microscope: Mechanical property extraction from amorphous to crystalline materials
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Sub-10-nm electron-beam lithography for templated placement of colloidal quantum dots
… the investigation of resolution limits of electron-beam lithography (EBL) at the sub-10-nm scale. EBL patterning was investigated at low electron energy (2 keV) in a converted scanning electron microscope and at high electron energy (200 keV) in an aberration-corrected scanning transmission …
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The Degradation of Spatial Resolution in Thin Foil X-Ray Microchemical Analysis Due to Plural Scattering of Electrons
… simulation of incoherent plural scattering of electrons has been developed in order to estimate the broadening of an electron probe as it propagates through a solid. By applying this approach to modeling the spreading of a fine (50 (ANGSTROM)) probe focused on a thin foil in a scanning …
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Synthesis and Characterization of Magnetic II-VI Nanoparticles
… of the nanocrystals was done through transmission electron microscope (TEM) imaging and UV-Vis absorption spectroscopy. Spin-carrier relaxation times were determined using a superconducting quantum interference device (SQUID) magnetometer.
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Electron microscopy study of degradation mechanisms in Ni-rich transition metal oxide cathodes for Li-ion batteries
… of these degradation mechanisms using electron microscopy techniques. The relative importance of various aspects of NMC811 degradation is probed using tailored electrochemical protocols. Electron energy loss spectroscopy in a scanning transmission electron microscope, as well as …
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Understanding the Environmental Sensitivity of Nickel(3) Aluminum
A Controlled Environment Transmission Electron Microscope was used to investigate the failure of a boron-free polycrystalline Ni3Al alloy produced by cold rolling and recrystallizing a single crystal in hydrogen. The effect of hydrogen is to lower the threshold stress for the nucleation of …
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Imaging the dynamics of soft materials at microscale and nanoscale
… such as bright-field and dark-field optical microscopes and liquid-phase transmission electron microscope, have been utilized to capture the dynamics of three distinct yet typical soft materials in situ at different length scales: colloids, polymeric chains, and nanobubbles. While …
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Rapid Solidification and Undercooling of Aluminum-Germanium Alloys: Characterization and Control of Microstructure (Metastability, Metallic Glass, Electron Microscopy)
… determinations to be performed directly in a transmission electron microscope. This technique involves the in-situ melting and solidification of submicron powders, where it is possible to vary the cooling rate from the liquid or semi-solid state over a fairly large range while observing …
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Novel Synthetic Routes to Formation of Magnetic Nanocomposites
… properties of nanocomposites were analyzed by transmission electron microscope (TEM), energy dispersive spectra (EDS), superconducting quantum interference device (SQUID) and inductively coupled plasma (ICP). The nanocomposite materials were magnetic and exhibited optical properties similar to …
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Fluctuation Electron Microscopy Investigations of Medium Range Order in a-Silicon and a-Silicon:hydrogen Thin Films
… version of variable resolution fluctuation electron microscopy has been developed on the JEOL 2010F transmission electron microscope in the Center for Microanalysis of Materials, UIUC. This technique provides information on the spatial extent of the medium range order. Nanodiffraction …
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Development of process to transfer large areas of LPCVD graphene from copper foil to a porous support substrate
… and tears to both gold Quantifoil Holey Carbon transmission electron microscope grids with 1.2 [mu]m diameter pores and to Sterlitech polycarbonate track etch membranes with 200 nm diameter pores by bonding the substrates to the graphene then wet-etching the copper. The resulting membrane …
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Controlled multi-step purification of single-walled carbon nanotubes
… spectrometry, fluorescence spectrometry and transmission electron microscope (TEM) spectroscopy. The purity and yield of SWNT are improved due to reduced catalytic activity of the iron oxide. Greater iron oxide removal also resulted from oxidation at higher temperatures.
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