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Filtering by: Creator Velizhanin, Kirill A. Remove constraint Creator: Velizhanin, Kirill A. License All rights reserved Remove constraint License: All rights reserved

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  • Extremely efficient photocurrent generation in carbon nanotube photodiodes enabled by a strong axial electric field

    Creator:
    McCulley, Daniel R., Senger, Mitchell J., Bertoni, Andrea, and Perebeinos., Vasili
    Abstract:
    Carbon nanotube (CNT) photodiodes have potential to convert light into electrical current with high efficiency. However, previous experiments have revealed photocurrent quantum yield (PCQY) well below 100%. In this work, we show that axial electric field increases the PCQY of CNT photodiodes. In optimal conditions our data suggest PCQY >...
    Resource Type:
    Article
    Full Text:
    . (4) Cirloganu, C. M.; Padilha, L. A.; Lin, Q.; Makarov, N. S.; Velizhanin, K. A.; Luo, H.; Robel, I

  • A Genetic Algorithm Approach to Imaging the Internal Southern San Andreas Fault Zone

    Creator:
    Reinhard, Hannah R.
    Abstract:
    The southern San Andreas fault (SSAF) is the fault segment with the highest 30-year probability of causing a moderate to large magnitude earthquake in California, yet key structural characteristics of the fault remain unconstrained, particularly in the Coachella Valley where the fault splits into the Banning (BF) and Mission Creek...
    Resource Type:
    Masters Thesis
    Full Text:
    , especially Sarah and Kirill. I never expected to find such good friends in a small geophysics group. Thank

  • Quantum and Classical Simulation of Electronic Transport at the Nanoscale

    Creator:
    Gruss, Daniel S.
    Abstract:
    Time-dependent electronic transport is increasingly important to the state-of-the-art device design and fabrication. The development of nanoscale sensing, the harnessing and control of structural fluctuations, and the advancement of next-generation materials all require a treatment of quantum dynamics beyond the level of traditional methods and a more nuanced approach to...
    Resource Type:
    Dissertation
    Full Text:
    committee members Ethan Minot, David Roundy, and Guenter Schneider. Fellow collaborators Kirill Velizhanin

  • Controlling the Co-Precipitation of Colloidal PbSe Quantum Dots and Their Device Performance in a Diode Architecture

    Creator:
    McCrea, Tyler D.
    Abstract:
    In this work, colloidal PbSe quantum dots (QDs) are shown to be synthesized in a controlled manner by changing the growth time and reaction temperature in a microwave synthesis method. It is explained why quantum dots make such a unique material to create electronic devices and the specific benefits that...
    Resource Type:
    Masters Thesis
    Full Text:
    and Their Device Performance in a Diode Architecture Abstract approved

  • Nonlinear behavior of thermal and ion transport at the nanoscale

    Creator:
    Sahu, Subin
    Abstract:
    Functional control at the nanoscale forms the foundation of biological systems. These work at the cellular level by manipulating ions and molecules. Nanoscale devices that give functional control at this scale are also becoming an important component in diverse fields such as electronics, medicine, engineering, and manufacturing. Moreover, scientific advances...
    Resource Type:
    Dissertation
    Full Text:
    also go to Massimiliano Di Ventra, Kirill Velizhanin, Chih- Chun Chien, Yonatan Dubi, Evgheni Strelcov

  • Lift Enhancement of Pliant Wings Through Bio-Mimicry

    Creator:
    Osterberg, Nathaniel Brent
    Abstract:
    Flexible aerodynamic surfaces have been shown to favorably influence flight characteristics at low Reynolds numbers by increasing lift, angle of attack at stall, and resistance to perturbation. The objective of the research presented within this thesis is to investigate the influence of two aspects of flight observed in biological flyers,...
    Resource Type:
    Masters Thesis
    Full Text:
    biological flyers, a suction-surface flap and dynamic stall, when applied to pliant wings. A rigid flat

  • Subducting Seamounts and Heceta Bank: An Amphibious Seismic Tomography Experiment of the Central Oregon Forearc

    Creator:
    Nolan, Sarah
    Abstract:
    Studies reveal differences in slip segmentation and plate coupling along the Cascadia subduction zone. The segment between 44.0°N and 45.0°N exhibited reduced slip in the 1700 megathrust earthquake (Wang et al., 2013) and corresponds with previous rupture boundaries inferred from paleoseismic data (Leonard et al., 2010). Notably, this segment of...
    Resource Type:
    Masters Thesis
    Full Text:
    a lower slip deficit in multiple locking models (Schmalzle et al., 2014; Lindsey et al., 2021) and

  • Vegetative effects of RNAi-suppression of the poplar homolog of LEAFY in the field

    Creator:
    Jacobson, Jeremy
    Abstract:
    Due to public and regulatory restrictions, genetic containment technology is critical for research and development of transgenic trees in forestry. A multi-year field trial demonstrated that the RNAi-LFY construct successfully induces sexual sterility in 6K10 poplar (Populus alba) without visible effects on vegetative development. However, its limited number of replicates...
    Resource Type:
    Undergraduate Thesis and Presentation
    Full Text:
    Image of a poplar product 7 Poplar has potential to be used for bioenergy purposes 8 Poplar is

  • Measuring the Electric Field Dependence of Photocurrent Quantum Yield in Suspended Carbon Nanotube pn Junctions

    Creator:
    McCulley, Daniel R.
    Abstract:
    In nanoscale materials, the Coulombic interaction between electrons are stronger than in bulk materials. These stronger interactions, caused by confinement and reduced dielectric screening, have interesting consequences for light-matter interactions. In carbon nanotubes (CNTs), strong interactions can enhance the impact ionization process, and thus assist photocurrent generation in CNTs. Conversely,...
    Resource Type:
    Dissertation
    Full Text:
    efficiency photocurrent can be generated in a material that has strong Coulombic interactions between

  • The energy extraction performance of an oscillating rigid and flexible foil

    Creator:
    Totpal, Alexander D.
    Abstract:
    The aerodynamic performance of an oscillating pitching and plunging foil operating in the energy harvesting mode is investigated. Experiments are conducted in a closed-loop recirculating wind tunnel at Reynolds numbers of 24,000 to 48,000, and reduced frequencies (k = fc/u) of 0.042 to 0.083. Foil kinematics are varied through the...
    Resource Type:
    Masters Thesis
    Full Text:
    Energy Extraction Performance of an Oscillating Rigid and Flexible Foil Abstract approved: James A