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  • Examination of Dielectric Properties of BaTiO3-SrTiO3 Based Systems

    Creator:
    Trobough, Nathaniel D.
    Abstract:
    This thesis examines the dielectric properties of two systems based on the perovskite materials barium titanate and strontium titanate. A solid solution was created starting with these base materials and then adding varying amounts of bismuth-zinc titanate and sodium niobate. These compositions were calcined and sintered at temperatures determined to...
    Resource Type:
    Honors College Thesis
    Full Text:
    _____________________________________________________________________ Brady Gibbons, Committee Member, representing Mechanical, Industrial & Manufacturing

  • Designing bulk acoustic wave resonators for parametric amplification of spin waves

    Creator:
    Chowdhury, Pratim
    Abstract:
    Spintronics is an emerging field of research dealing with devices that can potentially exploit the additional degree of freedom provided by the electron spin along with or instead of the conventional electronic charge. One of the most promising aspects of spintronics is the potential use of magnetostatic spin waves as...
    Resource Type:
    Masters Thesis
    Full Text:
    evaluated as v1ejkz2 − v2ejkz1 jωa = (3.2) 2jsin(kd) v2e−jkz2 − v1e−jkz1 jωb = (3.3) 2jsin(kd

  • The Conduction Properties of Heavily Acceptor Doped Lead Zirconate Titanate Ceramics

    Creator:
    Sangwan, Vyomika
    Abstract:
    Heavily acceptor doped Pb1.02Dx(Zr0.5Ti0.5)1-xO3 ceramics, where A is the dopant, were investigated in this research. Dopants studied included iron, magnesium and manganese at mole concentrations x ≤ 0.20. X-ray diffraction data along with scanning electron microscopy images revealed the solubility limits of these ceramics. All doped compositions exhibited a shift...
    Resource Type:
    Masters Thesis
    Full Text:
    ferroelectric upon the application of an electric field, as explained by A. Moulson & J. Herbert.4 In the

  • Thermal conductivity measurements of amorphous metal thin films via the 3ω method

    Creator:
    Zhan, Kai
    Abstract:
    Amorphous multicomponent metals have promising applications in novel electronic devices because of their atomically smooth surface morphology and lack of grain boundaries. It is important to understand the thermal transport properties of amorphous metals and an accurate measurement of their thermal conductivity will be essential for further improvement of device...
    Resource Type:
    Masters Thesis
    Full Text:
    the specific heat capacity in units of J/(Kg·K), κ is the thermal conductivity, Q is heat sources

  • Bioelectronic Systems for Neurosensing Enabled by Graphene

    Creator:
    Fengel, Carly V.
    Abstract:
    Taking long-term electrical measurements of a large number of neurons simultaneously is required for many modern neuroscience experiments. However, such experiments are currently limited by the shortcomings of traditional neurosensing technology. For example, there is a significant mechanical mismatch between rigid silicon probes and soft biological tissues. This mismatch can...
    Resource Type:
    Dissertation

  • The Local Structure of Functional Electroceramics

    Creator:
    Culbertson, Charles M.
    Abstract:
    This work investigates the relationship between the local structure and physical properties of a set of classical (MgTiO3, CaTiO3, SrTiO3, and BaTiO3) and complex ((1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3[BZT-BCT], Na0.5Bi0.5TiO3 [NBT]) perovskite electroceramics. The materials in this work were synthesized via standard solid state ceramic synthesis, the structure was investigated through a number of...
    Resource Type:
    Dissertation
    Full Text:
    Anderson, and Brady Gibbons, for their time, commitment, helpful feedback, and for their generosity over

  • Microfluidic Investigations of Capillary Flow and Surface Phenomena in Porous Polymeric Media for 3D Printing

    Creator:
    Donovan, Katrina J.
    Abstract:
    The advent of 3D Printing has invigorated research into metamaterials, synthetic composite material that produce properties generally not found in natural materials, requiring further studies into understanding the fundamental properties of these materials. This dissertation proposes a novel imaging technique to investigate the surface interactions occurring in an unsaturated packed...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Katrina J

  • 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
    Full Text:
    Nyman, Mas Subramanian, David Cann, and Brady Gibbons. Their lectures during the coursework and

  • Development and Applications of Oxide Thin Films using Atomic Layer Deposition and Prompt Inorganic Condensation

    Creator:
    Smith, Sean Weston
    Abstract:
    In the first part of this work, thin films of Al₂O₃ deposited via atomic layer deposition (ALD) are demonstrated to improve the thermal stability of cellulose nanocrystal (CNC) aerogels. ALD is a chemical vapor deposition (CVD) like method in which sequential precursor exposures and self-limited surface reactions produce a conformal...
    Resource Type:
    Dissertation
    Full Text:
    . En-young, and X. Feng, J. South China Univ. Technol. 35, 91 (2007) 6 R. W. Johnson, A. Hultqvist

  • Development of Cu-based Thin Films for Optoelectronic Applications

    Creator:
    Angelos, Gregory S.
    Abstract:
    CIGS and CdTe based commercial thin-film solar cells (TFSCs) require an absorber thickness greater than 2 µm and 4 µm, respectively, to adequately absorb the solar spectrum. To efficiently extract photoexcited electrons, these TFSCs require relatively defect-free absorbers with high-minority carrier mobility (> 100 cm2V−1s−1) and long lifetime (> 10...
    Resource Type:
    Dissertation
    Full Text:
    making the cleanroom a fun learning environment. Finally, thank you to my committee, Dr. Brady Gibbons