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 102 for “"Scanning Transmission Electron Microscopy"”.
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Cryogenic scanning transmission electron microscopy of quantum materials
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-05-01
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Studying magnetic and 3D atomic structure using 4D scanning transmission electron microscopy
Transmission electron microscopy (TEM) has long been a powerful tool for materials characterization, capable of extracting structural and chemical information over length scales of microns to angstroms. More recently, advances in electron detectors facilitated four-dimensional scanning transmission …
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Angstrom-scale imaging of 2D molecular materials via scanning transmission electron microscopy and ptychography
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01
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Scanning transmission electron microscopy (STEM) and X-ray absorption spectroscopy (XAS) investigations of catalytic systems
… X-ray absorption spectroscopy (XAS) and scanning transmission electron microscopy (STEM) or spherical aberration-corrected STEM (Cs-STEM). Although the majority of the work focuses on γ-Al2O3 supported nanoparticles because of their industrial importance for fuel production, several other …
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Electron diffuse-scattering fluctuation and correlation analysis in complex face-centered-cubic alloys via four-dimensional scanning transmission electron microscopy
… of diffuse-scattering signals recorded by electron diffraction, which provide valuable insights into the structural characteristics of ordering, including direction and periodicity. Among the various electron diffraction techniques available, four-dimensional scanning transmission electron …
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Low energy ion beam modification of the titanium silicide (100) reaction
… characterization of these thin films included transmission electron microscopy, scanning electron microscopy, scanning transmission electron microscopy, Auger electron spectroscopy, x-ray energy dispersive spectroscopy, and x-ray diffraction. The ion assisted deposition parameters which were …
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Structural Characterization and Phase Behavior in Supported Metallic Nanoparticles
… temperature programmed desorption, and scanning-transmission electron microscopy. The data reveal that during activation in hydrogen the stabilizing CO shell is lost, and the metal centers assume an increasingly metallic electronic character. The incipient Pt-Ru nanoparticles initially …
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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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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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A Theoretical and Experimental Investigation of the Physical and Chemical Properties of Solid Nanoscale Interfaces
… analysis of x-ray absorption spectroscopy (XAS), scanning transmission electron microscopy (STEM), x-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM) measurements will be presented. These investigations will be dedicated to the study of (i) the effect of pre-treatment on the …
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Structural and mechanistic identification of heterogeneous catalysts
… a review of how a multimodal approach including scanning transmission electron microscopy, diffuse reflectance infrared Fourier transform spectroscopy, X-ray photoelectron spectroscopy and X-ray absorption spectroscopy may be employed to identify the catalytically relevant properties (charge …
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Low Energy Ion Bombardment Effects in Supersaturated Copper-Indium Alloys
Scanning transmission electron microscopy and Auger electron spectroscopy were used to investigate the effects of low energy (200 - 3000 eV) Ar('+) ion bombardment of supersaturated Cu:In alloys. Ion bombardment always resulted in the preferential sputtering of In although for sample temperatures …
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Low Temperature Growth and Characterization of ZnO Nanostructures
… used to characterize the two ZnO structures were electron microscopy including Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Scanning Transmission Electron Microscopy (STEM), diffraction pattern analysis via TEM, Energy Dispersive X-Ray Spectroscopy (EDS) via TEM, …
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Investigation of the structure and elemental composition of 2D Interfaces in Transition Metal Dichalcogenides
The electronics boom happened with the invention of semiconductor materials with Si becoming the number one in the race. But now, since Si electronics seems to be reaching its limit, the researchers are switching their attention to 2D materials because of their unique electrical, mechanical, or …
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Structure, conformational dynamics and formation of large amyloids: the case of alpha-synuclein fibrils
… magnetic resonance (NMR) experiments with scanning transmission electron microscopy (STEM) to obtain atomic level structural information of the alpha-synuclein (AS) fibrils and the mechanism of their formation; We first investigated the effect of protein deuteration and 1H decoupling …
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Characterization of aerosols in an underground mine
… in two phases of underground experiments. Scanning transmission electron microscopy and fast mobility particle sizers were used to determine the size distribution of agglomerates based on particle mobility and projected area diameter. Controlled zone sampling test results were used to …
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Structural and chemical characterization of complex nanomaterials at atomic resolution
… using X-ray absorption spectroscopy (XAS) and scanning transmission electron microscopy (STEM) revealed non-bulk-like behavior. Anomalous, temperature-dependent structural dynamics were characterized in the form of negative thermal expansion (NTE) and abnormal levels of disorder. To examine a …
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The effects of chemical composition, solidification rate, and homogenization on the intermetallic particle microstructure of AA8XXX aluminum alloys for battery foil applications
… supported by analytical tools including light microscopy (LM), scanning electron microscopy (SEM), scanning transmission electron microscopy (STEM) and X-ray diffraction (XRD). The study identified three primary morphologies: plate-shaped, feathery/skeletal, and needle-shaped, corresponding to …
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Three-dimensional electronic resistivity mapping of solid electrolyte interphase and anode active material in lithium-ion batteries
… In systems featuring both C and Si anodes, electronic resistivity of the solid-electrolyte interphase (SEI) layer is a critical factor for preventing continuous electrolyte decomposition reactions at the electrode/electrolyte interface. Moreover, the degradation of electronic conductivity of …
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Chemistry of airborne particles from metallurgical processing
… and energy dispersive spectrometry with both scanning electron microscopy (SEM-EDS) and scanning transmission electron microscopy (STEM-EDS). Other methods for properly characterizing particles were discussed. In the analysis, less than 10% of the mass of fume particles for various types of …
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