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 43 for “"nanostructuring"”.
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Nanostructuring magnetic thin films using interference lithography
Proliferation of data caused by rapid increases in computer power and the rise of the internet have caused an acute need for advanced data storage technology. Patterned magnetic media and magneto-resistive random-access memory (MRAM) can potentially fulfill this need. The technique of interference …
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Nanostructuring of Cu-TiB2 induced by ion irradiation
… that these dynamical processes can lead to nanostructuring in binary alloy system. Nanostructuring at steady state under irradiation could result in materials with very high irradiation resistance as interfaces can trap point defects and He atoms. The objective of this work was to study …
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Growth, physical properties, and nanostructuring of epitaxial metastable hafnium aluminum nitride
Item withdrawn by Mark Zulauf (zulauf@illinois.edu) on 2010-12-02T17:37:03Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 1 Howe_Brandon.pdf: 35213703 bytes, checksum: 4339e1bf08b5bebc6922899d61292b4e (MD5)
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The effect of nanostructuring and crystallinity on triboelectric energy harvesting devices for biomedical applications
… surface charge of the material pair used. Nanostructuring the material surfaces increases the surface area and therefore charge density, increasing the power output. Taking biocompatibility and relative charge affinity into consideration, poly-L-lactic acid (PLLA) was chosen in this work as …
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Preparation and Characterization of Single Walled Carbon Nanotubes Poly(3-hexylthiophene) Nanohybrids
… material were investigated and finally a nanostructuring technique able to create thin hybrid films with nanoscale phase separation was developed.
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Characterization of nanostructured hexagonal boron nitride patterned via high-resolution ion beam lithography
… 20 nm feature size. We study varying degrees of nanostructuring and defects via Raman spectroscopy, photo-thermal microscopy, and scattering-type scanning near-field optical microscopy and observe complimentary information about the phonon modes and the absorption and scattering of light from …
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Design and Assembly of Nanostructured Complex Metal Oxide Materials for the Construction of Batteries and Thermoelectric Devices
… thread in this thesis - nanotechnology! In fact, nanostructuring is a more preferred term for the approach I have taken herein. Another commonality between these two topics is the material system I have used to prove my hypotheses - complex metal oxides.</p> <p>Complex metal oxides can be used for …
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Investigation of the ligand shells of homo-ligand and mixed-ligand monolayer protected metal nanoparticles : a scanning tunneling microscopy study
… and even less so on how to control the resulting nanostructuring. In this thesis we present a Scanning Tunneling Microscopy investigation of the ligand shells of homo- and mixed-ligand metal nanoparticles.
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Improvement in mechanical properties through structural hierarchies in bio-inspired materials
… deformation transition in these structures. Nanostructuring, while improving ductility, affects the stiffness of these structures, softening them by up to 90% of bulk silica. Hierarchical assembly of silica structures is then used to regain the stiffness lost due to nanostructuring while not …
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Interaction of plasmas with lithium and tungsten fusion plasma facing components
… design of plasma facing components (PFCs). The nanostructuring of tungsten was investigated to determine the mechanisms by which tungsten nanostructures so that its formation may be mitigated. Experiments investigated the dependence of nanostructuring on temperature, looked at the morphological …
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The osteogenic effects of zirconia and titanium surfaces on human osteoblasts
… zirconia surfaces—through modifications such as nanostructuring and biofunctionalization—to enhance late-stage osteogenic outcomes. This work contributes to a better understanding of material-specific effects on osteoblast behavior and provides valuable insights for the design of next-generation …
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Towards Colloidal Self-Assembly for Functional Materials
Nanostructuring has led to materials with novel and improved materials properties driving innovation across fields as varied as transportation, computing, energy and biotechnology. However, the benefits of nanostructured material have not widely been extended into large-scale, three-dimensional …
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Synthesis and characterization of metal chalcogenide nanostructured materials for thermoelectric applications
… materials in bulk form. The approaches used for nanostructuring are (1) sol-gel assembly of discrete nanoparticles of PbTe, Bi⊂2⊂Te⊂3⊂, and Bi⊂2⊂Te⊂3⊂–⊂2⊂Te⊂3⊂ alloys, and (2) formation of heterostructured nanocomposites of PbTe nanoparticles in bulk Bi⊂2⊂Te⊂3⊂ (p– or n–doped) matrices.</p> <p> …
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Equilibrium configurations of oxygen bubbles on surfaces for applications in nanostructured hematite electrodes
… active application for these materials is in the nanostructuring of [alpha]-Fe₂O₃ (hematite) for photoelectrochemical (PEC) splitting of water to generate hydrogen. A model of a bubble on a nanorod was developed in this work to facilitate the understanding of equilibrium configurations of oxygen …
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Design of a stable nanocrystalline alloy
… in free energy associated with segregation and nanostructuring. It is discovered that the relationship of segregation and mixing enthalpies for a particular system dictates the nanocrystalline stability of the alloy. Nanocrystalline stability maps are constructed for several conditions that can …
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Grain Boundary Pinning Approach for Manufacturing High-Strength Nanocrystalline Aluminum Alloys
Nanostructuring is a commonly employed method to improve the mechanical properties of metals and alloys, but its usage is limited due to the instability of nanocrystalline (NC) materials. To address this challenge, the current study employs doping techniques to obtain a stable NC structure. In the …
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Three-dimensional nanotube arrays for solar energy harvesting and production of solar fuels
… photovoltaic devices largely rely on nanostructuring the photoabsorber layers due to the ability of improving photoabsorption, photocurrent generation and transport in nanometer scale. Vertically aligned, highly uniform nanorods and nanowire arrays for solar energy conversion have been …
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Less strain, more gain_nano_patterning III-N thin films
… at this scale. There are several advantages to nanostructuring III-N materials, including increased light extraction, increased device efficiency, reduction of efficiency droop, and reduction in crystallographic defect density. High defect densities that normally plague III-N materials and …
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Functional Materials and Device Concepts for Magnetic Sensing, Gas Detection and Energy Harvesting
… metal oxides interact with target gases. Nanostructuring, surface doping, and polymer functionalization are investigated to enhance sensitivity, selectivity, and humidity resistance. Particular emphasis is placed on tailoring surface interactions and optimizing responses to gases relevant …
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Soft Compartmentalized Polymer Colloids: Janus Particles, Multicompartment Structures, Inorganic-Organic Hybrids and Applications
… could easily be achieved. Secondly, the nanostructuring of polymer blends was shown for a PS/PMMA model system. The system exhibits a control on two length scales. The first is the controlled decrease of the domains of the dispersed phase and the second is the controlled spacing between …
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