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Filtering by: Creator English, Marshall J. Remove constraint Creator: English, Marshall J. Advisor Tate, Janet Remove constraint Advisor: Tate, Janet Degree Level Bachelor's Remove constraint Degree Level: Bachelor's

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  • Optical Modelling of Thin Films: Applying Effective Medium Theory to Mixtures of TiO₂ and SnO₂

    Creator:
    Wulf, Julian J.
    Abstract:
    This study used SCOUT optical modelling software to create models of the reflectance and transmittance spectra generated by mixtures of titanium dioxide (TiO2) and tin oxide (SnO2). These models enabled identification of how altering the ratio of a mixture changes the optical response. By being able to identify how altering...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    Films, Vol. 496, No.2, pp.505-514. doi:10.1016/j.tsf.2005.08.173.** [2]. Garahan, L. Pilon, J. Yin

  • Repair of a Scanning Tunneling Microscope and Retesting for the Formation of Pyramidal Structures Formed on Sputtered Germanium (110)

    Creator:
    Betz, Hazel R.
    Abstract:
    Semiconducting materials are of immense importance due to their presence in almost all modern devices. It is possible that the surface physics of semiconductors could be used to control the nanoscale topography and properties of these materials, ultimately creating new options for device fabrication. This could result in profound implications...
    Resource Type:
    Undergraduate Thesis
    Date Created:
    Full Text:
    , Marshall van Zijll. He had observed and characterized a variety of pyramidal structures forming on the

  • Electrical Transport Measurements on the Alloy Sn₁-ₓCaₓSe

    Creator:
    Stahly, Joshua
    Abstract:
    Hall measurements can be made on the unstudied alloy, Sn₁-ₓCaₓSe to determine its electrical transport properties. The Sn₁-ₓCaₓSe samples were made by laser deposition into thin films and have a variable of calcium concentration x. These samples are approximately 250 nm in thickness, were grown at 366° C and are...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    created by this current [6]. Figure 1.4: Optoelectronic measurements of SnSe1.2 [5]. 9 𝐽

  • Room Temperature Seebeck Measurements on CuSc1-xMgxO2+y Transparent Conductive Thin Films

    Creator:
    Easley, Dara L.
    Abstract:
    A series of seven magnesium-doped copper scandium oxide films were made by radio frequency sputtering, and intercalated at various oxygen pressures to create different oxygen concentrations in each film. The objectives of this study were to verify the p-type nature of these transparent conductive thin films, to determine the correlation...
    Resource Type:
    Honors College Thesis
    Full Text:
    V sample = a sample- Cu!J..T THot Copper Figure 8 - Sample Diff. Thermocouple A chromel

  • Optical Analysis of Titania : Band Gaps of Brookite, Rutile and Anatase

    Creator:
    Lance, Ryan A.
    Abstract:
    The optical transition in high-fraction polymorphs of titania (TiO2) were investigated to determine the band gap behavior of the most common polymorphs—brookite, rutile, and anatase—the values of which are varied in the literature. The direct optical band gaps of brookite, rutile, and anatase, were determined to be 3.37(7)eV, 3.41(11)eV and...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    References [1] Haggerty, J. E., Schelhas, L. T., Kitchaev, D. A., Mangum, J. S., Garten, L. M., Sun, W

  • Optical Characterization of Transparent Conductive Thin Films

    Creator:
    Tucker, Derek A.
    Abstract:
    The optical characterization of transparent conductive thin films is demonstrated. The basics of transparency and conductivity, as they relate to transparent conductor research, are explained. A functional model of the reflectance and transmittance of a sample film, including interference fringes, is derived from the Fresnel electric field amplitude coefficients. The...
    Resource Type:
    Honors College Thesis
    Full Text:
    spectrophotometric devices. Brief analysis of the measured spectrum [Transparency J 100% 0% ....... ..... --I

  • Spectroscopic Ellipsometry on Thin Films of TiO2: Comparing Cauchy and Cody-Loretnz Models in CompleteEASE

    Creator:
    Kreb, Joseph
    Abstract:
    Spectroscopic ellipsometry (SE) is used to characterize amorphous and crystalline thin films of TiO2. Amorphous precursor films of TiO2 are deposited by radio frequency magnetron sputtering on fused silica and silicon substrates. Annealing the amorphous precursor films induces them to crystallize into either pure or mixed phases of the three...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    (λ) = A + G>H + I >J (6) κ(λ) = 0 (7) The coefficient A largely determines the amplitude

  • Thermal conductivity measurements of amorphous thin films on silicon via the 3ω method

    Creator:
    Wiedle, River Alan
    Abstract:
    Thermal transport properties of a material are often difficult to measure, especially for thin films, but they are important for materials that have applications in modern devices, such as nano-scale electronics, thermoelectrics, and thermally resistive coatings. In this thesis, we describe an apparatus developed to measure the thermal conductivity of...
    Resource Type:
    Honors College Thesis

  • Development of a Brownian Motion Experiment for an Undergraduate Laboratory Course

    Creator:
    Wennstrom, Elena
    Abstract:
    A new class at Oregon State, PH 317: Experimental Physics, is designed to simulate a traditional laboratory research experience for undergraduate students. Several weeks of the class is devoted to Brownian motion experiments. Although this is a common topic for undergraduate lab classes, the experiment still needed some basic exploration...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    of Florida Department of Physics Advanced Physics Laboratory (2015). [2] D. Jia, J. Hamilton, L. M

  • Investigating Grain Boundaries in BaCuS1-xSexF Using Impedance Spectroscopy

    Creator:
    Horgan, Briony
    Abstract:
    Impedance spectroscopy is a method of modeling materials with equivalent circuits to determine electrical properties, such as the resistivity and the dielectric constant. We explore impedance spectroscopy, both theoretically and experimentally through applying the method to samples of BaCuS1-xSexF. Grain boundary effects were dominant in the results, and although they...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    Electrolytes.” Electrochemistry. Cambridge: John Wiley and Sons, 1987, 152-202. [2] A. J. Bard and L. R