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  • Structure-property relationships of layered oxypnictides

    Creator:
    Muir, Sean W.
    Abstract:
    Investigating the structure-property relationships of solid state materials can help improve many of the materials we use each day in life. It can also lead to the discovery of materials with interesting and unforeseen properties. In this work the structure property relationships of newly discovered layered oxypnictide phases are presented...
    Resource Type:
    Dissertation
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    diffraction. Structure refinement reveals that there is significant disorder within the a-b plane for Sb

  • Growth and characterization of the p-type semiconductors SnS and BiCuOSe

    Creator:
    Francis, Jason
    Abstract:
    BiCuOSe and SnS are layered, moderate band gap (ε[subscript G] ≈ 1 eV) semiconductors that exhibit intrinsic p type conductivity. Doping of BiCuOSe with Ca results in a slight expansion of the lattice and an increase of the hole concentration from 10¹⁸ cm⁻³ to greater than 10²⁰ cm⁻³. The large...
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    Dissertation
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    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 B X Ray Spectroscopy

  • Structure-property relationships in oxides containing select platinum group metals

    Creator:
    Gatimu, Alvin J.
    Abstract:
    Oxide materials exhibit a wide variety of structures and properties. In particular, transition metal oxides tend to be highly stable while exhibiting a wide range of properties that can be used for numerous applications. This work focuses on investigating how the structures’ of 4d and 5d transition metal oxides influences...
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    Dissertation
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    thermoelectric performance. This system showed possible correlations between cation ordering on the B-site and

  • New multi-functional chalcogenides for photovoltaic and thermoelectric materials

    Creator:
    Heo, Jaeseok
    Abstract:
    The subject of this PhD thesis is part of a research domain of great present interest in new semiconductor materials for photovoltaic and thermoelectric applications. This domain contains the elaboration and the study of both Cu-based chalcogenides bulk and thin-film samples, driven by materials design principles. One of the most...
    Resource Type:
    Dissertation
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    -crystal structures and use of instruments in his laboratory. Guenter Schneider, Ethan Minot, Michael

  • Power System Planning for Sustainable, Reliable, and Accessible Electricity: Models, Methods, and Metrics

    Creator:
    Cicilio, Phylicia R.
    Abstract:
    Generation resources are shifting from centralized, high inertial, fossil fuel based to decentralized, no inertia, and variable renewable resources. The evolution of generation resources in electrical grids requires the transformation of the electrical grid infrastructure, and operation and planning procedures and standards. This dissertation takes four investigations into how to...
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    Dissertation
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    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 B Twelve Bus System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 C 2000

  • Liquid-gated carbon nanotube transistor noise sources and sensitivity limits

    Creator:
    Sharf, Tal
    Abstract:
    Low-dimensional electronic materials offer a platform to observe biological processes with unprecedented spatial and temporal resolution. Carbon nanotubes (CNTs) are the closest physical analog to an ideal 1D system and can be scaled and integrated into multiplexed electronic circuitry. The molecular structure of a CNT is also biocompatible, making them...
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    Dissertation
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    ................................................................................................89 Appendix A. PMMA transfer of aligned CNTs .................................. 90 Appendix B

  • On the Properties and Characteristics of Solution Processed Hafnium Based Thin-Films from Aqueous Precursors

    Creator:
    Decker, Shawn R.
    Abstract:
    Aqueous hydroxo Hf nanoclusters enable studies to identify and codify steps in the deposition of Hf-based oxide thin films from solution precursors. HfOCl2 reacts with combinations of H2O2(aq), acids, and TMAH to produce polymetal species at high pH and low pH. X-ray scattering and spectroscopic methods reveal the nature of...
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    Dissertation
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    ………………………….. 121 8.1 (a) Structure of hafnium tetramer. (b) DLS size analysis for a 150 mM HafSOx solution

  • Parametric Pumping of Spin Waves Using Acoustic Waves

    Creator:
    Chowdhury, Pratim
    Abstract:
    Spintronics is an emerging field of research wherein the electron spin instead of, or along with, the conventional electron charge may be utilized in developing next generation logic devices. One of the most promising aspects of spintronics is that information transfer may be achieved by spin waves in logic devices,...
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    Dissertation
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    Appendices 90 A Instrumentation and experimental conditions . . . . . . . . . . . . . . . . . . . . 91 B

  • Examining the Environmental Behavior and Treatment Efficacy of Titanium Dioxide Nanomaterials in Complex Systems

    Creator:
    Deline, Alyssa R.
    Abstract:
    Metal oxide nanoparticles (MONPs) are manufactured at the greatest rate of any class of nanomaterial due to their wide variety of industrial, commercial, and environmental applications. The sustainable use of MONPs requires a balance of careful consideration of their potential negative environmental impacts with the effective exploitation of their unique...
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    Dissertation
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    .................................................... 160 7.2 Appendix B: Supporting Information for Chapter 3

  • Pulsed laser deposition and thin film properties of p-type BaCuSF, BaCuSeF, BaCuTeF and n-type Zn₂In₂O[subscript 5] wide band-gap semiconductors

    Creator:
    Kykyneshi, Robert
    Abstract:
    Thin films of wide band-gap semiconductors are deposited by the pulsed laser deposition method. Optimal deposition parameters for the individual compounds are reported. A family of p-type BaCuQF (Q = S, Se, Te) ceramics with a layered crystalline structure is investigated for active and passive device applications. Epitaxial films of...
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    ) .................................................................................... 141 Appendix B. An in-situ mask exchange system............................................. 146