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  • Platinum Nanoparticles in Transition Alumina: An Atomic Resolution Study of Interfaces

    Creator:
    Clauser, Arielle L.
    Abstract:
    The phases of transition alumina are scientifically interesting due to their high specific surface area, favorable acid/ base characteristics, and chemical and hydrothermal stability which make this metallic oxide a prime candidate for use as a support for metallic nanoparticles (NPs) in heterocatalysis. Interactions at alumina/Pt interfaces are important for...
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    Dissertation
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    applied to finely filter exhausts [1], manufacture petrochemicals [2], synthetic materials [3], convert

  • Multi-Technique Characterizations of Natural and Biomimetic Adhesives

    Creator:
    Fowler, James E.
    Abstract:
    There have been many attempts to characterize and mimic natural fluid-based adhesive systems. However, very few of these studies have examined surface or interfacial interactions between adhesive and substrate. Furthermore, until now no study has used a combination of surface analytical and kinematic techniques to determine the precise chemical mechanisms...
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    Dissertation
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    how the composition, order and relative orientation of adhesive molecules at functional interfaces

  • DC/AC Stability of In-Ga-Zn-O Thin-Film Transistors

    Creator:
    Zhou, Fan
    Abstract:
    The electrical stability of amorphous indium-gallium-zinc oxide (a-IGZO) thinfilmtransistors (TFTs) is investigated for flat-panel display applications. Althoughproducts incorporating a-IGZO TFT backplanes are already commercially available,e.g., iMac with 5K retina display, technical challenges need to be addressed for nextgenerationapplications, e.g., active-matrix organic light-emitting diode displays.Device stability is one crucial issue. The...
    Resource Type:
    Dissertation
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    gate voltage is applied, so that electrons are depleted from the interface, resulting in upward band

  • Functional polymers and proteins at interfaces

    Creator:
    Schilke, Karl F.
    Abstract:
    Functional polymers and proteins at interfaces and surfaces are of fundamental importance for biomaterials, biocatalysis and microreactor applications. Candida antarctica lipase B immobilized on poly-DL-tryptophan tethers showed 30x higher specific activity in aqueous and non-aqueous media than the same enzyme adsorbed or covalently bound directly to the surface. An excess...
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    Dissertation
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    presented on 30 November, 2009. Title: Functional Polymers and Proteins at Interfaces Abstract

  • Investigation of Energy Barrier Heights within Metal-insulator-metal Devices via Internal Photoemission Spectroscopy

    Creator:
    Jenkins, Melanie A.
    Abstract:
    Metal-insulator-metal (MIM) and dual-insulator MIM (MIIM) devices are used in rectennas, hot-electron transistors, single electron transistors, resistive random access memory (RRAM), and capacitors. The performance of these devices relies heavily on the energy barrier height at each metal-insulator interface. Thus, determination of the in-situ electron energy barrier at each interface...
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    Dissertation
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    ) at a given interface. However, the φB at real interfaces generally does not match this ideal value

  • The chemistry and device applications of amorphous thin-film interfaces

    Creator:
    Knutson, Christopher C.
    Abstract:
    Solid-state amorphous materials show amazing promise in thin-film electronics. The interface-to-bulk ratio of thin films makes interfacial chemistries of these systems of utmost importance. Thin films of amorphous metals, dielectrics and semiconductors have novel chemistries that are not only based upon their elemental constituent makeup, but also based upon the...
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    Dissertation
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    -state amorphous materials show amazing promise in thin-film electronics. The interface-to-bulk ratio

  • Novel Approaches to Porous Material Discovery

    Creator:
    Sturluson, Arni
    Abstract:
    Uses for materials with a large surface area and high porosity have grown sig-nificantly in recent years. Porous materials have found usage in applications such as separation, gas storage, sensing, purification and more, prompting researchers to find and discover numerous new porous materials to suit a specific purpose. Hundreds of...
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    Dissertation
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    Porous Material Discovery Abstract approved: Cory M. Simon Uses for materials with a large surface

  • Efficient power conversion interface circuits for energy harvesting applications

    Creator:
    Le, Triet T.
    Abstract:
    Harvesting energy from the environment for powering micro-power devices have been increasing in popularity. These types of devices can be used in embedded applications or in sensor networks where battery replacement is impractical. In this dissertation, different methods of energy harvesting from the environment are explored as alternative sources of...
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    crystal or ceramic materials to generate an electrical potential in response to an applied mechanical

  • Defect Mechanisms in Bismuth-based Perovskites

    Creator:
    Kumar, Nitish
    Abstract:
    The aim of this research is to develop a fundamental understanding of the dominant defect species and the relevant defect equilibrium conditions for bismuth-containing perovskites to help guide the development of these materials for emerging applications. This is of paramount importance for many demanding applications, because ultimately the defect equilibria...
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    Dissertation
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    DISSERTATION OF Nitish Kumar for the degree of Doctor of Philosophy in Materials Science presented on

  • The synthesis and characterization of components for solid-state lithium cells : amorphous polyether-salt complexes, planar-sheet graphite fluorides, and layered organic

    Creator:
    Lemmon, John P.
    Resource Type:
    Dissertation
    Full Text:
    . Introduction 1 1.1 General Introduction 1 1.1.1 Anode Materials 2 1.1.2 Electrolytes 3 1.1.3 Cathode