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Filtering by: DOI 10.1175/1520-0426(1995)012<0346:COTKED>2.0.CO;2 Remove constraint DOI: 10.1175/1520-0426(1995)012<0346:COTKED>2.0.CO;2 Committee Member Ostroverkhova, Oksana Remove constraint Committee Member: Ostroverkhova, Oksana

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  • Electronic and Optical Properties of Defects in Amorphous Oxide and Transition Metal Dichalcogenide Semiconductors

    Creator:
    Vogt, Kyle
    Abstract:
    The optical and electronic properties of amorphous oxide thin films depend crucially on chemical composition, and deposition process variations which give rise to sub-gap defect states. Consequently, there is a need for a reliable, high-throughput method to extract sub-gap defect densities of states in amorphous oxide thin films. We present...
    Resource Type:
    Dissertation
    Full Text:
    tail region at 2.0 to 2.5 eV below the conduction band edge, with measured peak densities in the

  • Cis-2,5-diaminobicyclo[2.2.2]octane : a novel C₂-symmetric scaffold for asymmetric catalysis

    Creator:
    Shaw, Subrata
    Abstract:
    This thesis describes the development of a new enantioselective synthetic method employing chiral cis-2,5-diaminobicyclo[2.2.2]octane-based organometallic catalysts. The significance of this new method to organic synthesis is illustrated with preparation of enantioenriched products that are transformed to important pharmaceutical agents. Chapter 1 provides a brief historical overview of asymmetric catalysis, especially...
    Resource Type:
    Dissertation
    Full Text:
    References 1. Livesey, G.; Brown, J. C. J. Nutr. 1995, 125, 3020. 2. Raymer, G. S.; Hartman, D. E.; Rowe, W

  • CoLocalized Excitation Emission Resolution : A CLEER approach for multicolor fluorescence analysis

    Creator:
    Almlie, C. Kyle
    Abstract:
    Fluorescence has proven to be a robust and powerful method of analysis in numerous fields: forensics, pharmaceutics, geology, food science, and environmental sciences have all developed a large collection of fluorescence instruments and methods to overcome application-specific challenges. Biological applications saw the same development of a fluorescence toolkit with methods...
    Resource Type:
    Dissertation
    Full Text:
    in the Burrows group, and 2) reduce spectral cross-talk to increase the number of available

  • Interlayer Electronic Interactions in Twisted and Stacked Bilayer Graphene

    Creator:
    Patel, Hiral
    Abstract:
    The photophysical properties of two-dimensional (2D) layered van der Waals (vdW) materials, and their heterostructures are manifestly distinct from crystalline bulk materials. Recently, the discovery of new 2D vdW materials and strongly-bound interlayer excitons in these materials has created a new branch in nanoscience. As such, there are a number...
    Resource Type:
    Dissertation
    Full Text:
    developed a novel 2-photon photoluminescence (PL) microscopy technique to detect emission. The detected PL

  • Total Synthesis of Isotopologues of Xanthohumol and its Congeners for Biological Studies

    Creator:
    Plagmann, Layhna S.
    Abstract:
    Xanthohumol [XN, (E)-6´-methoxy-3´-(3-methylbuten-2-yl)-2´,4´,4´´-trihydroxychalcone], the principal prenylated chalcone from hops, and its 2,3-dihydro- (DXN) and O6-desmethyl-2,3-dihydro- (DDXN) congeners, are of potential utility for the amelioration of metabolic syndrome; however, their complex bioactivity profiles cannot be properly studied and understood without access to appropriately produced synthetic materials. In the first part of...
    Resource Type:
    Masters Thesis
    Full Text:
    ‐mediated oxidation (≤10% yield [13C]‐8)54 and via a TEMPO/Co(OAc)2‐catalyzed oxidation (no reaction), 55

  • Applications of Holographic Optical Tweezers: Multiplexed Fluorescence Spectroscopy and the Micromechanics of Type-I Collagen

    Creator:
    Cibula, Matthew A.
    Abstract:
    The development and some applications of holographic optical tweezers (HOT) are presented. Our HOT system uses a spatial light modulator (SLM) to control the location and properties of the optical trap. We have developed a method for optimizing the diffraction efficiency of a SLM that can be applied in situ...
    Resource Type:
    Dissertation
    Full Text:
    nonlinear phase modulation and phase modulation less than 2π. The method employs a one-dimensional blazed

  • Ground tap placement and sizing to minimize substrate noise coupling in RF LNAs

    Creator:
    Sundaresan, Arathi
    Abstract:
    The substrate noise injected by a stepped buffer circuit into two single-ended 1.5GHz low noise amplifiers is examined for a heavily doped 0.25µm CMOS process. The difference in the LNA noise rejection is characterized as a function of the size and placement of substrate contacts. The use of a resistive...
    Resource Type:
    Masters Thesis
    Full Text:
    device parasitics give good correlation between the measured and simulated results. A reduction of 2

  • 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...
    Resource Type:
    Dissertation
    Full Text:
    growths detailed in Chapter 2 and used for the films in chapter 3 were prepared by Vorranutch Jieratum in

  • Monte Carlo studies of classical Heisenberg spins on face-centered-cubic lattices : effects of strain, interlayer coupling, and dilution of lattice

    Creator:
    Park, Seongweon
    Abstract:
    This thesis presents the results from Monte Carlo calculations on classical vector spins in face-centered-cubic (FCC) lattices. The goal of the study was to understand the effect of interlayer coupling, dilution of magnetic atoms in the lattice, and symmetry-changing strain. Experimental work by T. M. Giebultowicz et al. and J....
    Resource Type:
    Dissertation
    Full Text:
    inspired my work [1, 2]. J. A. Borchers’s group studied NiO/CoO superlattices and observed that the

  • Theoretical study of beryllium borohydride Be(BH₄)₂

    Creator:
    Alghamdi, Maha D.
    Abstract:
    Ab initio calculations using the B3LYP and CCSD(T) methods were employed in this work to explore the most stable structure of the intriguing compound Be(BH₄)₂, for which as many as seven different structures have been proposed in the literature. Use of the B3LYP density functional method with several large basis...
    Resource Type:
    Masters Thesis
    Full Text:
    Beryllium Borohydride Be(BH4)2 Abstract approved: _______________________________________ Joseph W