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Filtering by: Creator Cottam, Douglas F. Remove constraint Creator: Cottam, Douglas F. Degree Field Chemistry Remove constraint Degree Field: Chemistry

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  • 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...
    Resource Type:
    Dissertation
    Full Text:
    Christopher C. Knutson, E. William Cowell III, William Stickle, John F. Wager, Douglas A. Keszler

  • Determination of fluorinated alkyl substances in aqueous systems

    Creator:
    Schultz, Melissa M.
    Abstract:
    Fluorinated alkyl substances, which can be persistent, toxic, and bioaccumulative, have been quantitated in many densely populated and remote regions, including in air, surface waters, groundwater, and biota; however, little is known about their transport or behavior in the environment. Wastewater effluent is one of the principal routes for introducing...
    Resource Type:
    Dissertation
    Full Text:
    Fluorinated Alkyl Substances in Aqueous Systems. Abstract approved: Douglas F. Barofsky Fluorinated alkyl

  • Gas-phase fragmentation chemistry of protonated peptide ions

    Creator:
    Bythell, Benjamin James
    Abstract:
    The fragmentation characteristics of protonated peptides have been investigated using tandem mass spectrometry (MS/MS) under various fragmentation regimes and detailed density functional theory (DFT) reaction pathway calculations. The DFT calculations predict novel salt-bridge stabilized transition structures as well as consecutive reactions occurring in proton-bound dimers for some of the ions...
    Resource Type:
    Dissertation
    Full Text:
    Protonated Peptide Ions Abstract approved:________________________________ Douglas F. Barofsky

  • Proteomic approach to the analysis of DNA-binding proteins using mass spectrometry

    Creator:
    Stapels, Martha Degen
    Abstract:
    In proteomic studies, separate experimental protocols have been necessary to identify proteins, determine their function, and predict their three-dimensional structure. In this study, a function-based separation of proteins was conceived to fractionate proteins prior to enzymatic digestion. In the initial demonstration of this technique, a DNA substrate was used to...
    Resource Type:
    Dissertation
    Full Text:
    Douglas F. Barofsky Reproduced with permission from Journal of Proteome Research, submitted for

  • Ion pairing of nucleotides with surfactants for enhanced sensitivity in liquid matrix assisted secondary ion mass spectrometry

    Creator:
    Pavlovich, James Gilbert
    Abstract:
    In particle induced desorption-ionization mass spectrometry the strength of an analyte's signal under a given set of bombardment conditions is usually considered to be representative of the analytes relative surface activity. This rationale is generally used to explain differences in the technique's sensitivity between and within various classes of compound....
    Resource Type:
    Dissertation
    Full Text:
    Secondary Ion Mass Spectrometry Abstract approved: ouglas F. Barofsky In particle induced desorption

  • Mass spectrometric analysis of UV-crosslinked protein-nucleic acid complexes

    Creator:
    Doneanu, Catalin E.
    Abstract:
    The DNA-binding domains of E. coli uracil-DNA glycosylase (Ung) and human replication protein A (hRPA) were studied using a general protocol developed in our laboratory for probing protein-DNA interactions. The procedure involves purification and mass spectrometric analysis of the nucleopeptide-products of a tryptically digested UV-crosslinked protein-nucleic acid complex. In the...
    Resource Type:
    Dissertation
    Full Text:
    to acknowledge first my research advisor, Professor Douglas F. Barofsky, for giving me the

  • 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
    Full Text:
    : ______________________________________________________ Douglas A. Keszler The subject of this PhD thesis is part of a research domain of great

  • Synthesis and study of transparent p- and n-type semiconductors and luminescent materials

    Creator:
    Park, Cheol-Hee
    Abstract:
    New transparent p- and n-type semiconductors and luminescent materials have been prepared and characterized. Synthesis, structures, optical and electrical properties of new chalcogenide fluoride p-type transparent semiconductors MCuQF (M=Ba, Sr; Q=S, Se, Te) are described. Band-gap tuning and improvement in conductivity through p-type doping are demonstrated in the family. The...
    Resource Type:
    Dissertation
    Full Text:
    for Privacy ACKNOWLEDGMENTS I would first like to thank my major professor Dr. Douglas A. Keszler

  • Photoresist and ion-exchange chemistry of HafSOx

    Creator:
    Telecky, Alan J.
    Abstract:
    The chemistry of hafnium oxide based and materials are described in the context of ion exchange and lithography. HafSOx, represented by the composition HfO₂₋[subscript x](SO₄)x, is described to possess a significant capacity towards ion exchange in acidic and basic solutions, enabling films of HafSOx to be cleanly and readily be...
    Resource Type:
    Dissertation
    Full Text:
    : __________________________________________________ Douglas A. Keszler The chemistry of hafnium oxide based and

  • Refractory Amorphous Metal Thin Films

    Creator:
    Olsen, Kristopher R.
    Abstract:
    Amorphous metal thin films lack the grain boundaries and dislocations present in crystalline metal films. As a result, amorphous metal films can be more mechanically robust, atomically smooth, and more resistant to chemical attack than crystalline metals. However, amorphous metals are meta-stable and subject to crystallization upon heating, thus limiting...
    Resource Type:
    Dissertation
    Full Text:
    . Long3, Douglas A. Keszler1, John F. Wager2 1 Department of Chemistry, Oregon State University