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Filtering by: Creator Weber, Janice M. Remove constraint Creator: Weber, Janice M. Academic Affiliation Physics Remove constraint Academic Affiliation: Physics Degree Level Bachelor's Remove constraint Degree Level: Bachelor's

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  • Measuring Low Intensity Light Reflections of High Temperature CO₂ Adsorbed on SiO₂ Near Brewster's Angle

    Creator:
    Ferron, Thomas J.
    Abstract:
    This investigation expands on earlier methods of using surface polarization reflection (SPR) to characterize the first few monolayers of a surface. Past research measured intensities of light reflecting off an SiO₂ optical flat inside a vacuum. Pressure of applied gas was changed to view a change in reflection. In an...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    assume our data follows the form, f(θ)M(θ) = d(θ). Given d(θ) as the raw data collected, f(θ) is the

  • Optical Tweezer Trapping of Colloidal Polystyrene and Silica Microspheres

    Creator:
    Peters, Kyle C.
    Abstract:
    Optical trapping is a tool used throughout a wide variety of disciplines rang- ing from precisely probing and manipulating sub-micron organisms in biol- ogy to analyzing fundamental charge transfer in colloidal physics. This thesis presents research involving optical tweezer force measurements of polystyrene and silica microspheres. In addition, preliminary work...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    second law; X i Fi = m d2x dt2 = FB(t)� � dx dt ) FB(t) = m d2x dt2 + � dx dt (4.1) where

  • Fungal Photonics

    Creator:
    Spafford, Jasper
    Abstract:
    The spalting fungus Scytalidium cuboideum secretes a red pigment that produces naphthoquinonic crystals that are a photonic material candidate. The molecule can pack together in different configurations resulting in amazingly different optical properties. I developed a procedure (slowly evaporating the solvent) to preferentially grow two of these configurations, which have...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    orange crystals. [2] The scale bar reads 50 μm. 4 Figure 1.1: Red pigment molecule

  • Implementation of a comparative method for measuring photoluminescence quantum yield of novel compounds in solution

    Creator:
    Brandner, Bret
    Abstract:
    Quantum yield is an important, characteristic quantity to be measured for fluorescent compounds. Here, a comparative method between fluorescent compounds in solution is applied to measure unknown quantum yields. An absorption spectrometer was used to measure the absorbances of two different fluorescent quantum yield standards. The integrated fluorescence intensities were...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    methods of Weber et al.[4], who utilized the “dipolar scattering of monochromatic light from solutions of

  • Optoelectronic Properties of a Novel Fungi-derived Pigment

    Creator:
    Wiesner, Cameron
    Abstract:
    In industry, there is considerable interest in finding sustainable, renewable materials for use in electronic devices. Pigments derived from spalting fungi are of particular interest due to their longevity in diverse environmental conditions. The focus of my project was to characterizethe properties of a novel, fungi-derived pigment, and to discover...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    ​, 225− 232, (1992). [6] Weber, G., Boonloed, A., Naas, K., Koesdojo, M., Remcho, V., Robinson, S., “A

  • Solution method and error evolution of student responses to chain rule problems within a thermodynamics course

    Creator:
    Founds, Ian, W and Founds, Ian W.
    Abstract:
    Chain rules are critical to the process of solving many thermodynamics-related partial derivatives. This study evaluates the solution method and error evolution of students’ responses to a pair of chain rule problems in an upper-level undergraduate thermodynamics course. Students’ responses were categorized by solution method. Students’ solution methods included implicit...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    % 20% 25% 30% 35% 40% 0 1 2 3 CRD Diff Div Diff RE Imp Diff Var RE Other N U U M B E R O