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  • 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:
    convergence of these two complimentary fields and the creation of a field-deployable µTAS. The literature

  • A study of deep levels of AlGaAs/GaAs heterojunction bipolar transistors

    Creator:
    Huang, Chun-ta
    Abstract:
    A study of deep levels of the emitter region of a heterojunction bipolar transistor is investigated using deep level transient spectroscopy (DLTS), deep level admittance spectroscopy (DLAS), thermally stimulated capacitance (TSCAP), and capacitance-voltage (C-V) profiling. The DX center, with an activation energy of 0.45 eV, is the only deep level...
    Resource Type:
    Masters Thesis
    Full Text:
    (field emission) from the trap; (3) the existence of a non- abrupt transition width between the space

  • Physical vapor deposition of novel thin-film solar absorbers

    Creator:
    Waters, Benjamin E.
    Abstract:
    Current leading thin-film solar cell technologies, i.e., cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS), employ elements which are either toxic (Cd), or rare and/or expensive (In, Te, Ga, and Cd). The aim of this thesis is to investigate new, abundant, non-toxic p-type semiconductors for potential solar absorber application....
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . 28 2.20 Energy band diagram showing (a) field emission, (b) thermionic-field emission, and (c

  • SSPM-based optical fiber radiation dosimeter

    Creator:
    Konnoff, Daniel C.
    Abstract:
    Current state-of-the-art environmental, clinical, and in-vivo radiation sensing systems utilizing various inorganic and tissue-equivalent plastic scintillators are not user friendly, suffer from electron-beam-generated noise, and are difficult to deploy successfully for real-time dosimetry. A robust, real-time detection system using different scintillating materials coupled to solid-state detectors by optical fibers is...
    Resource Type:
    Masters Thesis
    Full Text:
    electric field such that the energy gained initiates a transition of an electron from the valance band to

  • Characterization of a fiber optic coupled dosimeter for clinical electron beam dosimetry

    Creator:
    Nitzling, Kevin Dave
    Abstract:
    Fiber-optic-coupled dosimeters (FOCDs) are a relatively new method in which to obtain in-vivo dose concomitant with radiation treatment. Accurate live dosing can be achieved virtually anywhere due to their small dimensions (0.2 mm) which can be accommodated by a catheter. The purpose of this experiment is to characterize the electron...
    Resource Type:
    Masters Thesis
    Full Text:
    . 4.6.7 Electron Cable Effect A 25 x 25 cm 2 cone (36 x 36 cm 2 field size), 100 SSD, a 6 MeV

  • Inorganic thin-film solar cells

    Creator:
    Spies, Jack Alexander
    Abstract:
    The primary objective of this thesis is to explore new absorber and p-type window layer materials for thin-film solar cell applications. A new thin-film electron beam deposition system has been installed, is now operational, and has been used to deposit several types of solar cell absorber layers. Material investigations include...
    Resource Type:
    Masters Thesis
    Full Text:
    to explore new absorber and p-type window layer materials for thin-film solar cell applications. A

  • Modified VLSI designs for error correction codes

    Creator:
    Chen, Lupin
    Abstract:
    Nowadays, error correction codes have become an integral part in almost all the modern digital communication and storage systems. With the continuously increasing demands for higher speed and lower power communication systems, efficient VLSI implementations of those error correction codes have great importance for practical applications. In this thesis, several...
    Resource Type:
    Masters Thesis
    Full Text:
    . 2.1.2 Coding In 1948 Shannon published a paper regarding basis of the entire field of information

  • Thin-film transistors with amorphous oxide channel layers

    Creator:
    Grover, Manan S.
    Abstract:
    In recent years, a new class of high-performance thin-film transistors (TFTs) has emerged comprising amorphous oxide channel materials composed of heavy-metal cations (HMCs) with (n-1)d¹⁰ns⁰ (n ≥ 4, where 'n' refers to the row of the periodic table) electronic configuration. This thesis is devoted to the fabrication and characterization of...
    Resource Type:
    Masters Thesis

  • Development of high efficiency solar absorbers

    Creator:
    Ravichandran, Ram
    Abstract:
    Current cadmium telluride and copper indium gallium diselenide thin-film solar cells (TFSCs) utilize thick absorbers (2 - 4 μm). For efficient carrier extraction in these TFSCs, the absorber layer requires high carrier mobilities and a long minority carrier lifetime, which necessitates the use of a high purity, defect-free thin film....
    Resource Type:
    Dissertation
    Full Text:
    indicates that a built-in drift field aids carrier extraction, reducing mobility and lifetime requirements

  • Analysis and modeling of GaAs MESFET's for linear integrated circuit design

    Creator:
    Lee, Mankoo
    Abstract:
    A complete Gallium Arsenide Metal Semiconconductor Field Effect Transistor (GaAs MESFET) model including deep-level trap effects has been developed, which is far more accurate than previous equivalent circuit models, for high-speed applications in linear integrated circuit design. A new self-backgating GaAs MESFET model, which can simulate low frequency anomalies, is...
    Resource Type:
    Dissertation
    Full Text:
    ofessor Forbes A complete Gallium Arsenide Metal Semiconconductor Field Effect Transistor (GaAs MESFET