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Filtering by: Creator Halling, Roy E. Remove constraint Creator: Halling, Roy E. Committee Member Chang, Chih-hung Remove constraint Committee Member: Chang, Chih-hung

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  • Modeling and development of fabrication method for embedding membrane based microvalve in bulk microfluidic device

    Creator:
    Abhinkar, Bindiya S.
    Abstract:
    PDMS membrane-based microvalves are becoming increasingly more important for the control of fluid flow within MECS applications such as microreactors used to synthesize nanoparticles and biological macromolecules. The motivation for pursuing PDMS membrane-based microvalves is for implementing a plug flow microreactor to simulate slug flow yielding a narrower residence time...
    Resource Type:
    Masters Thesis
    Full Text:
    interface. I am also thankful to Dr. Roy D. Haggerty for his time for being the Graduate Council

  • Characterization of CoGe Thin Films and Powders

    Creator:
    Pfau, Andrew James
    Abstract:
    Cobalt germanides have been widely studied as semiconductor contact materials, but recent theoretical studies suggest that they may also be excellent catalysts for methane steam reforming with stabilities and activities comparable to noble metal catalysts. In order to study the catalytic activity of cobalt germanides, it is critical to first...
    Resource Type:
    Masters Thesis
    Full Text:
     the a) as‐deposited sample and the b) 300 °C, c) 400 °C, d)  500 °C, e) 600 °C annealed samples

  • Quantum dot plasmon coupling : Fundamental study and applications

    Creator:
    Kannegulla, Akash
    Abstract:
    The dissertation focuses on the engineering of light-matter interaction using plasmonic nanoparticles and metamaterials to achieve enhanced luminescence and based on which to improve the performance of biosensing and light-emitting technologies. We designed and fabricated a spectrum of nanostructures to exhibit particular dispersion relations capable of controlling the spontaneous emission...
    Resource Type:
    Dissertation
    Full Text:
    nanoarrays in the square areas. Outside the squares are plane Ag surfaces. (e) Enhancement factors of the

  • Design And Testing Of A Flow Electrolyzer For Selective Seawater Electrolysis

    Creator:
    Chou, Kuan-Hsun
    Abstract:
    Hydrogen is of great interest as a fuel, as its oxidation produces benign water (without CO₂ emissions), its gaseous form can be transported in existing pipe infrastructure, and it can be obtained via renewable electricity from water. However, current hydrogen production is mainly produced from fossil fuels (e.g. methane), exacerbating...
    Resource Type:
    Masters Thesis
    Full Text:
    reactions of electrolysis of water can be shown as: Anode: H!O(#) → ½ O!(%) + 2H & ('() + 2e) , E

  • Zero kinetic energy photoelectron spectroscopy of polycyclic aromatic hydrocarbons

    Creator:
    Zhang, Jie
    Abstract:
    In this dissertation, I present electronic spectra of a few polycyclic aromatic hydrocarbons (PAHs): tetracene, pentacene, pyrene, benzo[g,h,i]perylene and benzo[a]pyrene using resonantly enhanced multiphoton ionization (REMPI) and zero kinetic energy (ZEKE) photoelectron spectroscopy. The work of tetracene and pentacene also combine a laser desorption source with a ZEKE spectrometer, demonstrating...
    Resource Type:
    Dissertation
    Full Text:
    state as intermediate states: (a) 0 00 , (b) 15 1 , (c) 22 2 15 1 , (d) 15 2 , (e) 14 1 ,and (f

  • An Investigation on Nanoscale-shape-mediated Coupling Between Temperature and Densification in Intense Pulsed Light Sintering of Silver Nanoparticles

    Creator:
    Bansal, Shalu
    Abstract:
    In Intense Pulsed Light (IPL) sintering, pulsed large-area visible light from a xenon lamp is absorbed by nanoparticle films or patterns and converted to heat, resulting in rapid sintering of the nanoparticles. This work experimentally characterizes IPL sintering of silver nanoparticle films. A newly observed turning point in the evolution...
    Resource Type:
    Masters Thesis
    Full Text:
    films at fluence (a) E1 (b) E2 (c) E3; and during IPL of 40 nm films at fluence (d) E1 (e) E2 (f) E3

  • Electrical Conductivity in Mixed-Species Biofilms for Enhancing Energy Generation in Anaerobic Microbial Systems

    Creator:
    Li, Cheng
    Abstract:
    Further enhancement of energy generation is desired for practical application of anaerobic microbial systems such as microbial fuel cells (MFC) and anaerobic digesters (AD). A possible approach is to enhance the ability of microbial communities to transfer electron extracellularly in the form of electrical current. Critical to perform direct extracellular...
    Resource Type:
    Dissertation

  • Hydrogen production via a sulfur-sulfur thermochemical water-splitting cycle

    Creator:
    AuYeung, Nicholas J.
    Abstract:
    Thermochemical water splitting cycles have been conceptualized and researched for over half a century, yet to this day none are commercially viable. The heavily studied Sulfur-Iodine cycle has been stalled in the early development stage due to a difficult HI-H₂O separation step and material compatibility issues. In an effort to...
    Resource Type:
    Dissertation

  • Conversion of biomass constituents to hydrogen-rich gas by supercritical water in a microchannel reactor

    Creator:
    Goodwin, Aaron K.
    Abstract:
    Microreactors offer high rates of heat transfer able to intensify highly endothermic biomass reforming reactions in supercritical water. In this study, two continuous flow microreactor configurations were used to gasify biomass constituents in supercritical water. The first reactor configuration was a micro diameter stainless steel or Hastelloy tube (508 µm...
    Resource Type:
    Dissertation

  • Femtosecond Stimulated Raman Studies of Excited State Structural Events

    Creator:
    Tang, Longteng
    Abstract:
    Femtosecond stimulated Raman spectroscopy (FSRS) is an ultrafast vibrational technique which allows rapid collection of Raman spectra with simultaneously high temporal and spectral resolution. With the recent development of FSRS methodology, three FSRS techniques (conventional, tunable, and anti-Stokes) have been implemented in our laboratory to dissect the excited state structural...
    Resource Type:
    Dissertation
    Full Text:
    suggestions. I want to thank Dr. Marita Barth, who let me be her E-campus TA for several terms. I also want