Index Catalog // ScholarsArchive@OSU

Optoelectronics and Quantum Transport in Ultra-Clean Chirally-Identified Carbon Nanotubes

Creator:: Senger, Mitchell J.
Abstract:: Physicists who study semiconductor devices are fascinated by the fundamental limits of device performance. From the sub-threshold swing of transistors to the power conversion efficiency of photocells, performance is limited by the electronic structure of the materials used to build them. To surpass traditional device limits, we must turn to...
Resource Type:: Dissertation

Framework for Computational Modelling of Cellular Diffusion Systems

Creator:: Senger, Mitchell John
Abstract:: Many biological processes are regulated by the presence and movement of cellular Ca²⁺ ions. The concentration of Ca²⁺ in a cellular environment is regulated by IP₃ sensitive channels that lie on the surface of a cell’s endoplasmic reticulum. Little is known about the macroscopic effects of intracellular Ca²⁺ activity, so...
Resource Type:: Undergraduate Thesis
Full Text:: Diffusion Systems Thesis by Mitchell John Senger Advised By Dr. Bo Sun 8 May 2015 Oregon State

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:: OF AUTHORS Mitchell Senger wrote data analysis protocols, performed simulations of optical

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:: . McCulley1, Mitchell J. Senger1, Andrea Bertoni2, Vasili Perebeinos3, Ethan D. Minot1* 1Department of

Dielectric Engineering Boosts the Efficiency of Carbon Nanotube Photodiodes

Creator:: Senger, Mitchell J., Kefayati, Ali, Bertoni, Andrea, Perebeinos, Vasili, and Minot, Ethan D.
Abstract:: Carbon nanotube (CNT) photodiodes are a promising system for high-efficiency photocurrent generation due to the strong Coulomb interactions that can drive carrier multiplication. If the Coulomb interactions are too strong, however, exciton formation can hamper photocurrent generation. Here, we explore, experimentally and theoretically, the effect of the environmental dielectric constant...
Resource Type:: Article
Full Text:: Photodiodes Mitchell J. Senger,† Ali Kefayati,§ Andrea Bertoni,‡ Vasili Perebeinos,§ Ethan D. Minot

Universal interaction-driven gap in metallic carbon nanotubes

Creator:: Senger, Mitchell J., McCulley, Daniel R., Lotfizadeh, Neda, Deshpande, Vikram V., and Minot, Ethan D.
Abstract:: Suspended metallic carbon nanotubes (m-CNTs) exhibit a remarkably large transport gap that can exceed 100 meV. Both experiment and theory suggest that strong electron-electron interactions play a crucial role in generating this electronic structure. To further understand this strongly-interacting system, we have performed electronic measurements of suspended m-CNTs with known...
Resource Type:: Preprint and Article
Full Text:: nanotubes Mitchell J. Senger1, Daniel R. McCulley1, Neda Lotfizadeh2, Vikram V. Deshpande2, Ethan D

Clay mineralogy and sedimentary petrology of the cretaceous Hudspeth formation, Mitchell, Oregon

Creator:: Jarman, Clara Birchak
Resource Type:: Dissertation
Full Text:: ' hay -Al rich Mt. /C iflyOfl Cit I MITCHELL __._.J Strawbe ry Mt.. Y-2 2 BEARWAY MEADOWS V-I 3

An evaluation of well-water nitrate exposure and related health risks in the Lower Umatilla Basin of Oregon

Creator:: Mitchell, Thomas J.
Abstract:: Excessive nitrates in drinking water pose a human health threat, especially to infants. Methemoglobinemia, or blue-baby syndrome, is a potentially fatal condition that inhibits the ability of red blood cells to bind and transport oxygen. Nitrates/nitrites have also been linked to such conditions as cancer, birth defects, and behavioral and...
Resource Type:: Masters Thesis
Full Text:: health risks in the Lower Umatilla Basin of Oregon AN ABSTRACT OF THE THESIS OF Thomas J. Mitchell for

Spontaneous and enviornmental [sic] mutagenesis in mismatch repair deficient cells

Creator:: Shin-Darlak, Chi Y.
Abstract:: DNA damage, if not repaired, can become a mutation. Mutation accumulation is associated with initiation and progression of tumorigenesis. DNA mismatch repair (MMR) is required for maintaining genetic stability by repairing replication errors. Biochemical studies have shown that MMR also recognizes mismatch-causing DNA lesions, suggesting the role of MMR in...
Resource Type:: Dissertation
Full Text:: Environmental Mutagenesis in Mismatch Repair Deficient Cells Abstract approved: Mitchell S. Turker DNA damage

Factors contributing to the formation of CC-->TT tandem mutations

Creator:: Skinner, Amy M.
Abstract:: The multistage model of carcinogenesis states that an accumulation of mutations in genes that are important for maintaining cellular homeostasis may lead to cancer. A specific type of mutation observed in particular types of cancer is the CC-->TT mutation found in the TP53 gene of patients with basal or squamous...
Resource Type:: Dissertation
Full Text:: approved: Mitchell Turker, Ph.D. The multistage model of carcinogenesis states

ScholarsArchive@OSU

Optoelectronics and Quantum Transport in Ultra-Clean Chirally-Identified Carbon Nanotubes

Framework for Computational Modelling of Cellular Diffusion Systems

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

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

Dielectric Engineering Boosts the Efficiency of Carbon Nanotube Photodiodes

Universal interaction-driven gap in metallic carbon nanotubes

Clay mineralogy and sedimentary petrology of the cretaceous Hudspeth formation, Mitchell, Oregon

An evaluation of well-water nitrate exposure and related health risks in the Lower Umatilla Basin of Oregon

Spontaneous and enviornmental [sic] mutagenesis in mismatch repair deficient cells

Factors contributing to the formation of CC-->TT tandem mutations

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