Search Constraints

Start Over
Filtering by: Creator Taylor, Kendrick C. Remove constraint Creator: Taylor, Kendrick C. Advisor Ostroverkhova, Oksana Remove constraint Advisor: Ostroverkhova, Oksana Degree Level Bachelor's Remove constraint Degree Level: Bachelor's

Search Results

  • 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:
    C. Peters An Undergraduate Thesis Submitted to Oregon State University In partial fulfillment for

  • Gravitational Waves and the Laser Interferometer Space Antenna (LISA) and “Lab on a Chip”

    Creator:
    Gifford, Jessica
    Abstract:
    Improvements on the charge control measurements of the torsion pendulum, electron gun, and autocollimator system were conducted at the University of Washington in preparation for the fabrication of the final prototype of the Laser Interferometer Space Antenna (LISA) gravitational wave detector for NASA. One main cause of transient forces on...
    Resource Type:
    Honors College Thesis
    Full Text:
    LED by increments as small as a pico-coulomb. The average charging for the UV LED is 3.5*10-14 C/s

  • Exploration of charge-transfer exciton formation in organic semiconductors through transient photoconductivity measurements

    Creator:
    Neunzert, Afina
    Abstract:
    This project investigated transient photoconductivity in organic donor-acceptor (D-A) systems, where a flourinated anthradithiophene, ADT-TES-F, acts as the donor. Various acceptor molecules were used, with different sidegroups, and different HOMO (highest occupied molecular orbital) and LUMO (lowest unoccupied molecular orbital) energy level offsets relative to the acceptor. Thin film composites...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    heterojunctions. The Journal of Physical Chemistry C, 116(34):18108�18116, 2012. [4] A. D. Platt, M. J. Kendrick

  • Optical Tweezers-Based Probe of Charge Transfer in Organic Semiconductors at Microscopic Scales

    Creator:
    Busche, Jacob A.
    Abstract:
    A method for measuring the (dis)charging dynamics of organic semiconductors with single-electron resolution in multiple environments is developed using optical tweezers. A 1μm silica bead was coated with either a pristine organic semiconductor or an electron donor-acceptor blend, trapped using optical tweezers, and driven with an oscillating electrical driving force....
    Resource Type:
    Honors College Thesis
    Full Text:
    is larger to denote increased intensity. Rays b and c denote light entering the microsphere from the

  • A Study of Charging Behaviors in Organic Semiconductors using Optical Trapping

    Creator:
    Founds, Graham M.
    Abstract:
    We measure the charging and discharging of two organic materials, PCBM and ADT-TES-F. These materials are studied through the noncontact method of particle trapping known as Optical Tweezers, where an IR laser is used to constrain the motion of a coated or noncoated silica sphere while its positional data is...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    histogram. C) The frequency power spectrum of the sphere’s motion. Displays the frequency spectrum of the

  • Study of Organic Semiconductors Using Time-Resolved Charge Measurements at the Microscale

    Creator:
    Wallace, Richard
    Abstract:
    Understanding charge transfer in organic semiconductors is important for developing devices like organic light emitting diodes and flexible electronics. Optical tweezers have been used in many disciplines for trapping, manipulating, and analyzing microscopic objects such as microspheres, micro-organisms, and other colloidal particles. Using optical tweezers, studies have measured the average...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    holder (c). . . . 12 3.2 The experimental setup for the trapping of coated microspheres . . . . . . 13

  • Low temperature microscopy of organic optoelectronic materials

    Creator:
    Thieme, Mattson
    Abstract:
    We present a report on a new capability for low temperature microscopy of organic optoelectronic semiconductor materials. We may now perform photoluminescence (PL) and conductivity measurements as a function of temperature on a microscopic level. Testing confirmed the setup's ability to support microscopic measurements at pressures of 10^-6 Torr and...
    Resource Type:
    Undergraduate Thesis
    Full Text:
    , whose cheerful presence made for an exceptional introduction to scienti�c writing. In addition to Dr

  • 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:
    .) ganodermophthorum​ is a spalting, or wood-staining, fungus similar to Chlorociboria (C.) aeruginosa​, the spalting