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.
Results
Showing 1 to 20 of 967 for “"Engineering, Materials Science."”.
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STEM crisis or STEM surplus?
The science, technology, engineering, and mathematics (STEM) workforce is a crucial driver of the U.S. economy. Over the last decade, there has been significant concern regarding the adequacy of the supply of STEM workers to meet the demands of the market. At the same time, many experts have …
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Solid-Binding Peptides Enable Biomolecular Surface Assemblies and Mineralization
… proteins in their interactions with inorganic materials. Despite many years of intense research, the key mechanism(s) of protein-mineral interactions and their pathways to mineralization still eludes us. Our lab’s research delves into genetically designing and engineering peptides that have an …
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Carbon formation on metal carbides in chlorine-containing gases at high temperature.
Carbon formation on metal carbides in chlorine-containing gases at high temperature.
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Cold drawing and crack layer growth in amorphous polymers.
Cold drawing and crack layer growth in amorphous polymers.
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Controlling Plasmon Coupling in Biomolecule-Linked Nanoparticle Assemblies
<p>Molecular control of plasmon coupling is investigated in biomolecule-linked nanoparticle assemblies in two-particle, small cluster, and extended network formats. The relationship between structure and optical properties is explored through comparison of measured spectra with simulated spectra …
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Inkjet printing for fabrication of organic photonics and electronics
Organic light-emitting devices (OLEDs) are traditionally patterned either through vacuum deposition masks or by UV lithographs. However, such patterning routes are relatively expensive, time consuming, and geometry limited. On the other hand, developments in the use of inkjet printing as a tool to …
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Correlation of the microstructure and processing conditions of ultra-thin oxygen-implanted silicon-on-insulator materials
… on the microstructure of ultra-thin SIMOX materials formed by 65 keV ion implantation were investigated using transmission electron microscopy (TEM), scanning electron microscopy (SEM), Auger electron spectroscopy (AES), Rutherford backscattering spectrometry (RBS), and optical microscopy. …
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Molecular simulations of surfactants and silanes: Self-assembly in solutions and on surfaces, and friction between monolayers
Recent experimental efforts have focused on the development of water-based chemistries to deposit hydrophobic alkylsilane films on the silica surfaces to address the problem of stiction induced failure in MEMS. A detailed molecular level examination of the structure of these films is limited with …
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Mechanical Properties and Microstructure of Copper Alloys and Copper Alloy-Stainless Steel Laminates for Fusion Reactor High Heat Flux Applications
A solid plate of CuAl25 alloy hot isostatically pressed to a 316L stainless steel plate showed the best overall mechanical properties of the studied bi-metallic bonded panels. Bond properties were nominally inferior to constituent bulk material properties and fracture toughness values, in …
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Scanning Tunneling Microscopy and Spectroscopy of Carbon Nanotubes Interfaced With Silicon Surfaces
Single-walled carbon nanotubes (SWNTs) are high-aspect-ratio molecular wires that exhibit either metallic or semiconducting behavior depending upon their diameter and chiral angle. SWNTs support high-mobility electrical conduction, are chemically and mechanically robust, and can both emit and …
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Integration of Single -Walled Carbon Nanotubes With Gallium Arsenide(110) and Indium Arsenide(110) Surfaces: A Scanning Tunneling Microscopy Study
… suggesting the exciting possibility of substrate-engineering for the design and fabrication of novel nanotube-based electronic devices.
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Etching, Roughening, and Patterning of Silicon(100) With Halogens
With variable temperature STM, the surface modification dynamics of Cl- and Br-Si(100)-(2 x 1) were studied. Chlorine (Bromine) caused surface roughening that created pits and regrowth islands with minimal desorption of SiCl 2 (SiBr2). The roughening and equilibrium morphologies at 700--750 K for …
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Additive Fabrication and Soft -Lithographic Patterning of Microelectronic Devices
Chapter 1 outlines the background and motivation for applying selective film deposition and soft-lithographic patterning techniques to microelectronic device fabrication. Chapter 2 describes how microcontact printing of organic self-assembled monolayers (SAMs) can be used to induce selective …
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Deposition of Metal Oxides and Metal Carbonyls on Silicon Surfaces Using Solution Chemistry
The Si-H bonds on the H-Si(111) surface and Co2(CO)8 in n-heptane solution reacted to form a well defined submonolayer coverage of Co(CO)4 above the surface plane of Si(111). Transmission Fourier-transform infrared spectroscopy analysis of (OC) 4Co-Si(111) yielded structural and geometric …
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Structure and Dynamics in Ligand-Protected and Supported Metal Nanoparticles
This dissertation describes the use of x-ray absorption spectroscopy (XAS) and advanced electron microscopy methods to develop fundamental understandings of nanoparticle structure. Analysis of the x-ray absorption spectra provides structural information with 0.001 A precision. Quantitative …
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Structural Analysis and Radiation Response of Multi-Walled Boron Nitride Nanotubes
Electron irradiation damage analysis has revealed that: (1) Damage mechanism is different from carbon nanotubes; no radiation induced amorphization was observed, (2) irradiation response of BN nanotubes to 200 keV electrons in TEM environment is almost independent of temperature, (3) under intense …
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The Dynamical Behavior of Confined Aqueous Systems
The nanorheological behavior of artificial tear films (polyvinyl alcohol aqueous solutions) and synovial fluids was of scientific importance for future medical ramifications. The effects of chemical additives, ionic strength and adjoining surface chemistry on the static and dynamic interactions of …
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Studies on the Brittle -Ductile Transition in Silicon
After a specimen geometry that ensures straight crack growth was found for the experiment described above, research on crack turning was continued. As a hot glass plate is dipped into cool water, a pre-crack may grow along many different paths depending upon the testing parameters. In silicon the …
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