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Filtering by: Creator Johnson, Dexter W. Remove constraint Creator: Johnson, Dexter W. Academic Affiliation Chemistry Remove constraint Academic Affiliation: Chemistry Committee Member Nyman, May Remove constraint Committee Member: Nyman, May

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  • Tuning Functional Properties of Pyrochlore and Related Oxides via Cation and Anion Substitutions

    Creator:
    Giampaoli, Gabriella C. S.
    Abstract:
    Inorganic structures play an important role in materials due to their versatility and diversity. A complete understanding of the structure of a material is vital to enhance the creation of new materials that fill voids in research. The rational design of these compounds is driven by the exploitation of structure-property...
    Resource Type:
    Dissertation
    Full Text:
    experience than I ever expected. I would also like to thank Luanne Johnson, Sarah Burton, Paula Christie

  • Unique Structural Properties and Motifs of Metal-Oxides from Solids to Clusters

    Creator:
    Malmberg, Christopher E.
    Abstract:
    In this dissertation, the structural properties, thermodynamics and defect behavior of amorphous metal oxides and polyoxometalates are studied. Amorphous metal oxides have many applications, most notably as a semiconducting material used as the active matrix of thin film transistors. Alas, the amorphous nature of these materials makes studying them rather...
    Resource Type:
    Dissertation
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    ) and VI (Mo and W), which exhibit contrasting chemistries in solution. With group V forming primarily

  • New chemistry for electrochemical energy storage applications

    Creator:
    Wang, Xingfeng
    Abstract:
    Electrochemical capacitors and batteries are two major electrochemical energy storage technologies, which have been investigated extensively to meet the rapidly-growing demand for higher energy, higher power, lower cost and enhanced safety in the past few decades. With the charge storage mechanism of electrostatic charge adsorption desorption via electrical double layers,...
    Resource Type:
    Dissertation
    Full Text:
    a par with state-of-the-art non-aqueous capacitors, while delivering a maximum power of 6222 W/kg

  • Aqueous niobium chemistry at low pH : new precursors for oxide thin films

    Creator:
    Park, Deok-Hie
    Abstract:
    Phosphate and peroxide stabilize new oxo-hydroxo niobium clusters in water at low pH. The clusters open a new chapter in aqueous niobium chemistry under acidic conditions. The clusters also produce atomically smooth, amorphous niobium oxide phosphate (NbPOx) thin films. Reaction pathways from cluster solutions to amorphous niobium oxide phosphate solids...
    Resource Type:
    Dissertation
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    . Chem. Mater. 1997, 9, 580–587. (14) Nadarajah, A.; Carnes, M. E.; Kast, M. G.; Johnson, D. W

  • Precursor Chemistry and Film Structure and Properties via Solution Deposition

    Creator:
    Huang, Yu
    Abstract:
    Chemistry of preparing dense film from solution deposition is explored with several cases in this thesis. Surface dense structure, conversion at melting point, and ion exchange in aqueous solution are the main topics covered here for the thin films of aluminum oxide phosphate and tin dioxide. Thin film density, optical...
    Resource Type:
    Dissertation

  • New Graphite Intercalation Chemistry with Ethers and Amines

    Creator:
    Zhang, Hanyang
    Abstract:
    Novel donor-typed ternary graphite intercalation compounds (GICs) are synthesized and characterized containing (1) pyrrolidinium cations with DMSO co-intercalates; (2) alkali metal cations with crown ether co-intercalates; and (3) alkali metal cations with polyethylene glycol co-intercalates. Structural and compositional data are obtained for the stable products. A new ether-amine co-intercalate exchange...
    Resource Type:
    Dissertation

  • Reaction Pathways of Oxo-Hydroxo Group 5 Clusters to Metal Oxide Thin Films

    Creator:
    Mansergh, Ryan H.
    Abstract:
    Oxo-hydroxo Group 5 metal clusters are an untapped resource to study and advance aqueous solution processing of metal oxide thin films. The tetramethylammonium (TMA) hexatantalate salt (TMA6[H2Ta6O19]) yields dense Ta2O5 films (~95% of the bulk ß-Ta2O5 density) with atomically smooth surfaces (<4 Å root mean square surface roughness). This same...
    Resource Type:
    Dissertation
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    Sputtering. Mater. Sci. Eng. B 2005, 118, 234–237. (25) Sethi, G.; Olszta, M.; Sloppy, J.; Horn, M. W

  • Fundamental Studies of the Structure-Property Correlations of Na-ion and K-ion Storage in Non-Graphitic Carbon

    Creator:
    Li, Zhifei
    Abstract:
    Grid-scale energy storage systems are urgently needed to increase the flexibility and rigidity of the grid for modern society and take full advantage of the renewable green energy resources such as solar energy and wind energy. Na-ion batteries (NIBs) and K-ion batteries (KIBs) have been emerged as one of the...
    Resource Type:
    Dissertation

  • Himeradine A : synthetic efforts towards himeradine A and related natural products, a Michael reaction focused approach

    Creator:
    Collett, Nathan D.
    Abstract:
    Lycopodium alkaloids have generated enormous amounts of interest from the scientific community, both as synthetic targets and for their medicinal properties. Herein is described work towards a unifying approach to large segments of the Lycopodium family. An organocatalyzed intramolecular heteroatom Michael reaction method, for the construction of piperidine and piperizine...
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    Dissertation
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    on lycopodium alkaloids: (a) Ma, X.; Gang, D. R. Nat. Prod. Rep., 2004, 21, 752-772. (b) Ayer, W. A

  • New Graphite Intercalation Chemistry with Alkaline Earth Metals

    Creator:
    Xu, Wei
    Abstract:
    Novel graphite intercalation compounds (GICs) and associated chemistry have been explored, specifically: (1) containing alkyl- substituted imidazolium cations; (2) a series containing alkaline earth metal (Mg, Ca, Sr, Ba) cations with ethylenediamine (en) co-intercalates; (3) showing reversible intragallery M-M bonding and (4) via electrochemical intercalation of Mg cations with potential...
    Resource Type:
    Dissertation