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  • 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:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.8 The 4-f system composed of lenses L1 and L2 acts as a telescope to match the size of the

  • Method development for characterizing the hydrophobicity of engineered nanoparticles

    Creator:
    Lee, Fang Yu
    Abstract:
    Characterizing the hydrophobicity of nanoparticles can help us understand their fate and transport in the environment, as well as how nanoparticles may interact with biological systems. However, contact angle and partition coefficient have limitations in measuring the hydrophobicity of nanoparticles, thus promising methods to measuring the hydrophobicity of nanoparticles are...
    Resource Type:
    Masters Thesis
    Full Text:
    ) 0.05M, (c) 0.01M, and (d) 0M, followed by (e) 10%, (f) 20%, (g) 40%, (h) 80%, and (i) 100% ethanol

  • Terahertz Induced Non-linear Electron Dynamics in Nanoantenna Coated Semiconductors at the Sub-picosecond Timescale

    Creator:
    Stickel, Andrew
    Abstract:
    This dissertation is an exploration of the material response to Terahertz (THz) radiation. Specifically we will explore the ultrafast electron dynamics in the nonperturbative regime in semiconductors that have been patterned with nanoantenna arrays using broadband, high intensity, THz radiation. Three main semiconductor materials will be studied in this work....
    Resource Type:
    Dissertation
    Full Text:
    τpp = a) 3 ps, b) 1.5 ps, c) 0.5 ps, d) 0 ps, e) -0.5 ps, f) -1.5 ps, g) -3 ps, and h) -10 ps

  • Computational and experimental investigation of steady flow fields, turbulence, and hemodynamic wall stresses in patient-specific abdominal aortic aneurysm models

    Creator:
    Edgar, Erik S.
    Abstract:
    Steady flow fields and flow-induced wall stresses have been evaluated by experimental measurements and computational fluid dynamics (CFD) analysis in a series of patient-specific abdominal aortic aneurysm (AAA) models, over a range of Reynolds numbers (Re) from 125 to 3000 (500 to 3000 for CFD). Experimental methods used particle image...
    Resource Type:
    Masters Thesis
    Full Text:
    experimental measurements and computational fluid dynamics (CFD) analysis in a series of patient-specific

  • Study of creeping, inertial and turbulent flow regimes in porous media using particle image velocimetry

    Creator:
    Patil, Vishal A.
    Abstract:
    Porous media flows are encountered in many natural and man-made systems such as gas adsorption, filtration, heat exchangers, combustion, catalytic reactors and groundwater hydrology. This study experimentally investigates these flows as function of pore Reynolds number, Re[subscript pore]. The pore Reynolds number is based on the porous bed hydraulic diameter,...
    Resource Type:
    Dissertation
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    .................................................................................................... 41 4. Turbulent flow characteristics in a randomly packed porous bed based on PIV measurement

  • BaCuChF (Ch = S, Se, Te) p-type transparent conductors

    Creator:
    Zakutayev, Andriy
    Abstract:
    BaCuChF (Ch = S, Se, Te) materials are chalcogen-based transparent conductors with wide optical band gaps (2.9 – 3.5 eV) and a high concentration of free holes (10¹⁸ – 10²⁰ cm⁻³) caused by the presence of copper vacancies. Chalcogen vacancies compensate copper vacancies in these materials, setting the Fermi level...
    Resource Type:
    Dissertation
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    … 4 2.1 (a) Crystal structure of BaCuChF, (b) photographs of the BaCu(Ch1-xCh'x)F thin films

  • Per- and Polyfluoroalkyl Substances (PFAS) in Environmental Air-Water Matrices and Light Non-Aqueous Phase Liquids (LNAPL)

    Creator:
    Schwichtenberg, Trever J.
    Abstract:
    The presence of per- and polyfluoroalkyl substances (PFAS), organic contaminants first synthesized in the 1940s, has been reported worldwide in a variety of environmental matrices and ultimately in biological systems including humans. Ongoing research into PFAS has included identifying novel PFAS, assessing their fate and transport in the environment, and...
    Resource Type:
    Dissertation
    Full Text:
    partitioning coefficients were generated for the first time using field data. In Chapter 4, a novel method

  • Much Ado About Weak Measurement

    Creator:
    Bauml, Benjamin Noë
    Abstract:
    I had to write again. My research lay in science, and it was a science of three parts. The first part made a careful, introductory chapter, begged for by things that were lacking. It summarizes the von Neumann measurement model, derived from the Stern-Gerlach experiment, and it explains how weak...
    Resource Type:
    Capstone Project
    Full Text:
    ; 4. translational motion in the y-direction can be simulated with a time-dependent interaction which

  • Terahertz Imaging and Nonlinear Spectroscopy of Semiconductors using Plasmonic Devices

    Creator:
    Thompson, Zachary James
    Abstract:
    In this dissertation, a series of studies in the field of terahertz (THz) science are presented, specifically using nonlinear THz spectroscopy. We exploit huge field enhancement and subwavelength confinement in plasmonic structures. There are three distinct projects which will be discussed: nonlinear THz spectroscopy using plasmonic induced transparency (PIT), THz-triggered...
    Resource Type:
    Dissertation
    Full Text:
    , a series of studies in the field of terahertz (THz) science are pre- sented, specifically using

  • Computational nanooptics in hyperbolic metamaterials and plasmonic structures

    Creator:
    Thongrattanasiri, Sukosin
    Abstract:
    This dissertation concerns several problems in the fields of light interaction with nanostructured media, metamaterials, and plasmonics. We present a technique capable of extending operational bandwidth of hyperbolic metamaterials based on interleaved highly-doped InGaAs and undoped AlInAs multilayer stacks. The experimental results confirm theoretical predictions, exhibiting broadband negative refraction response...
    Resource Type:
    Dissertation
    Full Text:
    hypergratings……………………….. 40 3.5 Shift of a focal spot as a function of incident angle………………………….. 42 3.6

  • High-Field Terahertz Spectroscopy of Nanoscale Materials

    Creator:
    Mousavian, Ali
    Abstract:
    This dissertation covers my work relating to the application of strong terahertz (THz) radiation to study the nonlinear properties of nano-scale material. It presents experimental and numerical studies on the optical and electronic properties of various material system including single-layer graphene, multi-walled carbon nanotubes (MWCNTs), nanoantenna-patterned gallium arsenide (GaAs) and...
    Resource Type:
    Dissertation
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    coefficient 𝛼 ⊥= 0.024 per stack ............... 86 Figure 3-4 Transmission (a) and differential

  • Evaluation of Stress Corrosion Cracking of 316L Stainless Steel in FLiNaK Using the Slow Strain Rate Technique

    Creator:
    Quintana, Xavier A.
    Abstract:
    Molten salts have been targeted as a promising coolant for next generation reactors due to their high boiling point, heat capacity, and thermal conductivity. Despite these benefits, molten salt systems present unique materials compatibility issues, highlighted by the aggressive corrosion attack and dealloying typically seen on materials in these environments....
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . 38 4 Results 40 4.1 Mechanical Response

  • Synthesis and catalytic applications of derivatives of 7,7'-dihydroxy-8,8'-biquinolyl (azaBINOL)

    Creator:
    Wang, Chao
    Abstract:
    The synthesis of axially chiral polyfunctional derivatives of 8,8'-biquinolyl was explored and the catalytic action of appropriate derivative types investigated in three separate processes: (1) the silylcyanation of carbonyl groups and imines, (2) alkylation of a glycine Schiff-base via phase transfer-catalysis, and (3) direct amide bond formation from simple amines...
    Resource Type:
    Dissertation
    Full Text:
    coupling (69% yield of 8,8´- biquinolyl), a substrate directed double C–H functionalization via Pd(II

  • Unique Structural Properties and Motifs of Metal-Oxides from Solids to Clusters

    Creator:
    Malmberg, Christopher E.
    Abstract:
    In this dissertation, the structural properties, thermodynamics and defect behavior of amorphous metal oxides and polyoxometalates are studied. Amorphous metal oxides have many applications, most notably as a semiconducting material used as the active matrix of thin film transistors. Alas, the amorphous nature of these materials makes studying them rather...
    Resource Type:
    Dissertation
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    ...............................................................................................49 Chapter 4. First Principles Analysis of Defect States in a-IAZO

  • Influence of processing parameters on diffusion of divalent nickel in wet silica sol-gel monoliths

    Creator:
    Dickson, David J.
    Abstract:
    The diffusion of divalent nickel (Ni²⁺) from wet silica gels was investigated. Silica gel is gaining interest as an encapsulation matrix for biological components. The transport of biologically relevant species within the gel is determined by the structural characteristics of the gel, which are in turn governed by synthesis parameters....
    Resource Type:
    Masters Thesis
    Full Text:
    during gelation to yield gels with a final silica content of 40:1, 60:1, 80:1, and 100:1, moles of

  • Thermally-stable amorphous metal thin films

    Creator:
    McGlone, John M.
    Abstract:
    Amorphous metal thin films (AMTFs) are of potential use for metal-insulator-metal (MIM) tunnel diode applications due to their ultra-smooth surfaces, a consequence of their amorphous microstructure. The objective of this thesis is to design a thermally-stable AMTF capable of maintaining MIM tunnel diode performance after a post-deposition anneal in excess...
    Resource Type:
    Masters Thesis
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.8 A schematic illustration of an AFM system

  • The particle on a ring in polymer quantum mechanics : a quantum cosmology analogue on a compact space

    Creator:
    Siebersma, Maxwell R.
    Abstract:
    Loop quantum gravity is a framework for quantizing general relativity which imposes a discrete structure on space. In exploring the structure of loop quantum gravity, researchers have investigated loop quantum cosmology, a toy model with reduced degrees of freedom while maintaining a discrete space. Polymer quantum mechanics is a framework...
    Resource Type:
    Honors College Thesis
    Full Text:
    Positions . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 3.4 Dynamics on a Discrete Graph

  • Total synthesis of sparteine alkaloids from a common tetraoxobispidine intermediate

    Creator:
    Melbardis, John
    Abstract:
    In previous work (Blakemore et al. Org. Lett. 2005, 7, 4721; Heterocycles 2006, 70, 609), successful elaborations of the lupine alkaloids (±)-α-isosparteine (dl-2) and (±)-β-isosparteine (dl-3) were realized from a common tetraoxobispidine precursor, 3,7-diallyl -2,4,6,8-tetraoxo-3,7-diazabicyclo[3.3.1]nonane (93). Herein, the tetraoxobispidine approach to lupine alkaloids was extended to a total synthesis of...
    Resource Type:
    Masters Thesis
    Full Text:
    alkaloids contain two quinolizidine (4) rings (A-B & C-D of 1) fused to form a central bispidine (5) core

  • Development of Amorphous Metal Thin Films for Thermal Inkjet Printing and Microelectronics

    Creator:
    McGlone, John M.
    Abstract:
    Due to a lack of grain boundaries, an amorphous metal thin film (AMTF) possesses advantageous mechanical properties and enhanced chemical stability that is potentially useful for thermal inkjet (TIJ) printing applications. The use of an AMTF as a TIJ resistor or cavitation plate could lead to a thinner TIJ cavitation...
    Resource Type:
    Dissertation
    Full Text:
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 118 5.4 60× water immersion microscope image series of a firing event generated from a 1.5 µs @ 5V

  • 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:
    catalyst in hetero-Diels-Alder reaction: A FMO rationale 40 3.3 Mechanism of the Lewis acid-catalyzed