Index Catalog // ScholarsArchive@OSU

Investigating 2D semiconductor contacts for Cooper-pair light-emitting diode applications

Creator:: Nichols, Dublin M.
Abstract:: Future quantum technologies will require high-efficiency, on-demand sources of entangled photons. A possible route to building such light sources employs two-dimensional (2D) semiconductors interfaced with a source of Cooper pairs. To investigate the possibility of such devices, we are testing methods to make high transparency n-type contacts, p-type contacts, and...
Resource Type:: Poster

Fabrication and optical measurement of flip-chips for noninvasive electrostatic gating of nanomaterials

Creator:: Nichols, Dublin MacCray
Abstract:: Electrostatic gating of nanomaterials allows researchers to control carrier density and shape potential barriers that confine carriers. Lithographic patterning followed by metal deposition is the standard technique to define electrostatic gates; however, the methods of fabricating these devices often involve harsh processing. For example, taking a material to high temperatures...
Resource Type:: Capstone Project

Bioelectronic Systems for Neurosensing Enabled by Graphene

Creator:: Fengel, Carly V.
Abstract:: Taking long-term electrical measurements of a large number of neurons simultaneously is required for many modern neuroscience experiments. However, such experiments are currently limited by the shortcomings of traditional neurosensing technology. For example, there is a significant mechanical mismatch between rigid silicon probes and soft biological tissues. This mismatch can...
Resource Type:: Dissertation

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

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

Development of Micro-Electrode Array Sensors for Electrochemical Detection of Dissolved Oxygen

Creator:: Hansen, Hanna M.
Abstract:: Microelectrode array (MEA) dissolved-oxygen (DO) sensors were built and electrochemically tested in a solution of potassium ferricyanide. MEAs are becoming more popular as DO sensors because of their small size and capacity for simultaneous measurements with multiple recording sites. The ability to measure DO with multiple recording sites is useful...
Resource Type:: Undergraduate Thesis

Fabrication and low-temperature measurement of quantum devices

Creator:: Nichols, Dublin M.
Abstract:: Since the advent of graphene, research on 2D materials has exploded. Countless experiments have uncovered novel properties that emerge when different layered crystals are cleaved down to only a few atomic layers in thickness. The most popular of these non-graphene 2D materials is MoS2, a semiconductor which has been of...
Resource Type:: Undergraduate Thesis

Graphene Biotransistors, an Exploration of Neurosensing and Biofilm-sensing Applications

Creator:: Brown, Morgan A.
Abstract:: Atomically-thin graphene sheets have unprecedented characteristics for biosensing applications. These characteristics include mechanical flexibility and strength, optical transparency, electrical sensitivity and biocompatibility. The primary theme of this dissertation is the characterization and application of graphene field-effect transistors (FETs) in biologically-relevant physiological environments.Understanding the interface that forms between an electrolyte and...
Resource Type:: Dissertation

Intracellular Measurement of Neurons Using the Sharp Electrode Technique

Creator:: Howard, Jay F.
Abstract:: The Brain Research through Advanced Innovative Neurotechnologies (BRAIN) initiative seeks to understand how ensembles of neurons create neural networks. The initiative has spurred the pursuit of developing novel experimental tools for investigating how individual neurons propagate electrical signals (action potentials) to produce ensemble behavior. Classical techniques to measure the internal...
Resource Type:: Masters Thesis

Scanning photocurrent microscopy study of photovoltaic and thermoelectric effects in individual single-walled carbon nanotubes

Creator:: DeBorde, Tristan
Abstract:: Carbon Nanotubes are a unique family of nanostructures that have shown remarkable promise for mechanical, electrical, and optical applications. Fundamentally similar to the earlier discovered Buckminsterfullerene (C₆₀), carbon nanotubes are hollow cylinders formed from a single sheet of carbon atoms. The research presented in this dissertation investigates several carbon nanotube...
Resource Type:: Dissertation

ScholarsArchive@OSU

Investigating 2D semiconductor contacts for Cooper-pair light-emitting diode applications

Fabrication and optical measurement of flip-chips for noninvasive electrostatic gating of nanomaterials

Bioelectronic Systems for Neurosensing Enabled by Graphene

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

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

Development of Micro-Electrode Array Sensors for Electrochemical Detection of Dissolved Oxygen

Fabrication and low-temperature measurement of quantum devices

Graphene Biotransistors, an Exploration of Neurosensing and Biofilm-sensing Applications

Intracellular Measurement of Neurons Using the Sharp Electrode Technique

Scanning photocurrent microscopy study of photovoltaic and thermoelectric effects in individual single-walled carbon nanotubes

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