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Filtering by: Creator Nguyen, Dong Van Remove constraint Creator: Nguyen, Dong Van Committee Member Chang, Chih-hung Remove constraint Committee Member: Chang, Chih-hung

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  • 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

  • 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:
    ), collaborators (Professor Oksana Ostroverkhova and Jonathan Van Schenck), Murgesh Padmanarayan, and

  • Analyzing the Kinetics and Thermodynamics of Surface Reactions using Density Functional Theory

    Creator:
    Sprowl, Lynza H.
    Abstract:
    The interactions of chemical species with a solid surface play a role in many everyday applications such as heterogeneous catalysis, corrosion, and degradation reactions. Understanding the reaction kinetics and thermodynamics via rate constants and equilibrium constants, which require knowledge of the adsorbed species’ entropy, is essential for tuning these surface...
    Resource Type:
    Dissertation
    Full Text:
    Van der Waals Corrections

  • Developing rapid in vivo assays to investigate structure response relationships

    Creator:
    Truong, Lisa
    Abstract:
    Incorporation of nanoparticles (NPs) into consumer products is on the rise and human exposure to NPs is unavoidable. Currently, there is insufficient data to assess the safety of nanoparticles. I conducted a series of five studies using the zebrafish model to determine which NP components (i.e., core material or surface...
    Resource Type:
    Dissertation
    Full Text:
    . Nano Letters 6: 662-668. Darlington TK, Neigh AM, Spencer MT, Nguyen OT, Oldenburg SJ. 2009

  • 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

  • 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:
     system binary phase diagram reproduced with permission from the recent  study by Dong, et al

  • Design Principles of Transition Metal X-ide Catalysts for Electrochemical Oxygen Reduction and Evolution Reactions: In-Situ X-ray Spectroscopy Studies

    Creator:
    Wang, Maoyu
    Abstract:
    Hydrogen is the green fuel that can be produced from water through electrolysis and used via hydrogen fuel cells to generate electricity with zero carbon dioxide emission. The commercialization of electrolyzers and fuel cells is the critical step to achieving global carbon neutrality. However, it is severely hampered by the...
    Resource Type:
    Dissertation

  • Micro total analysis system for in-situ and autonomous spectrophotometric monitoring of iron in groundwater

    Creator:
    Koch, Corey R.
    Abstract:
    We have developed a compact micro total analysis system (μTAS) to serve as a platform for in-situ spectrophotometric water quality monitoring. Individual fluidic, optical, and electrical components were designed, developed, and characterized. These components were combined in both an integrated (single lithographic “chip-based” platform) and a modular manner. The microfluidic...
    Resource Type:
    Dissertation
    Full Text:
    . M., Sens. & Actuators, B1. 1990, 244-248. 3. Van Den Berg, A.; Lammerink, T. S. J., Top. Curr

  • Transition Metal Oxides for Aqueous Electrochemical Energy Storage

    Creator:
    Jiang, Heng
    Abstract:
    In the 21st century, environmental deterioration is now an indisputable fact. Reliable and economically viable electricity systems based on renewable sources are urgently needed to replace the environmentally detrimental fossil fuels. The feasibility of incorporating renewable-but-intermittent solar and wind energy heavily depends on the development of cost-effective and safe technologies,...
    Resource Type:
    Dissertation
    Full Text:
    . I wish to thank Dr. Shengyang Dong, Dr. Zelang Jian, Dr. Xingfeng Wang, Dr. Clement Bommier, and

  • Radiation effects in III-V heterojunction bipolar transistors

    Creator:
    Vuppala, Soujanya
    Abstract:
    Electron and neutron irradiation effects in InGaP/GaAs single heterojunction bipolar transistors are investigated in this thesis. Devices with different emitter sizes and grown by two different growth techniques were examined. Based on the physics of heterojunction bipolar transistors and concepts of radiation damage mechanisms, the irradiation effects were analyzed. The...
    Resource Type:
    Masters Thesis
    Full Text:
    ions, (2) The Van Allen radiation belts comprise geo-magnetically trapped electrons of up to about 10