Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Microwave resonances in isolated water-based spheres, dimers, and trimers are explored using simulations conducted with COMSOL Multiphysics. The study centers on morphology-dependent resonances (MDRs) and hotspot characteristics in cm-sized objects at microwave frequencies. Monomers subjected to microwave radiation exhibit four distinct resonant modes at specific sizes characterized by… more Full Text: Simulating Microwave Morphology Dependent Resonances in Aqueous Dimers and Trimers A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements of the Degree of Master of Science in the Faculty of Arts and Science …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Fisher, Kyle S., Thesis advisor (ths): Vreugdenhil, Andrew, Degree committee member (dgc): Slepkov, Aaron, Degree committee member (dgc): Gaspari, Franco, Degree committee member (dgc): Ponnurangam, Sathish, Degree granting institution (dgg): Trent University Abstract: <p>This thesis describes the preparation, optimization, functionalization, and characterization of activated carbon materials sourced from a petroleum coke feedstock for the tailored removal of heavy metal species in contaminated waters. The goal of this work is to develop an understanding of the mechanisms that drive adsorption of heavy metals onto activated carbon surfaces. By determining… more Full Text: The Investigation of Heavy Metal Adsorption on Modified Activated Carbon Materials A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctorate in Philosophy in the Faculty of Arts and …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Brick, Kasandra Julie Anne, Thesis advisor (ths): Keske, Eric C, Degree committee member (dgc): Maly, Kenneth, Degree committee member (dgc): Zenkina, Olena, Degree committee member (dgc): Vreugdenhil, Andrew, Degree granting institution (dgg): Trent University Abstract: <p>The synthesis of biaryls through transition metal catalyzed cross-coupling reactions has been instrumental for synthetic organic chemists. The Hiyama reaction, which features organosilicon derived cross-coupling partners with aryl chlorides, remains relatively underdeveloped compared to other cross-coupling reactions. In this thesis, it is demonstrated that bench stable Palladium N-… more Full Text: PALLADIUM N-HETEROCYCLIC CARBENE COMPLEXES IN CROSS-COUPLING REACTIONS: LIGAND AND CATALYST DEVELOPMENT A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty …
Year: 2024, 2024
Member of: Trent University Graduate Thesis Collection
Abstract: <p>There is a `universal' picture of a charged domain wall (CDW) in theoretical work, often depicted as residing in an infinite thickness film, charge neutral, and with no bias voltage applied. However, in experiment CDWs are shown with none of these assumptions. CDWs are produced in thin or ultra-thin films, the CDW is not charge neutral, and a bias voltage is being applied. We look… more Full Text: Models of Charged Domain Walls A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science. Trent University Peterborough, Ontario, Canada …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The generation of polymer brushes by surface-initiated polymerization techniques has become a powerful tool for the creation of hybrid materials. Governed by the type and amount of polymer used in the modification, the chemical and physical properties of a surface can be tailored by polymer grafting. In this study, a commonly used polymer flocculant, polyacrylamide (PAM), was grafted… more Full Text: Grafting Polyacrylamide from the Surface of Activated Carbon for Flocculation Applications A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Coherent anti-Stokes Raman scattering (CARS) microscopy is a label-free chemical imaging modality that uses CARS as a contrast mechanism to spatially resolve materials based on their molecular vibrational spectra. Due to the presence of a non resonant background that obfuscates the chemical information contained in CARS spectra, CARS images suffer from poor contrast and cannot be readily… more Full Text: Evaluation of Spectral Retrieval Methods for Hyperspectral Coherent Anti-Stokes Raman Scattering Microscopy A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements of the Degree of Master of Science in the …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Cornell, Brennan, Thesis advisor (ths): Atkinson, William, Degree committee member (dgc): Bradac, Carlo, Degree committee member (dgc): de Haan, Hendrick, Degree committee member (dgc): Rubel, Oleg, Degree granting institution (dgg): Trent University Abstract: <p>In electron-doped ferroelectrics, the free electrons can become concentrated along the domain walls which act like a conducting surface. We consider the impact of free electrons occupying the t2g orbitals on the domain walls of an electron-doped perovskite ferroelectric. We build an analytical model based on Landau-Ginzburg-Devonshire theory, and a trio of tight-binding Hamiltonians for… more Full Text: Effect of t2g Orbitals on Domain Walls in Electron-Doped Perovskite Ferroelectrics A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science. …
Year: 2023, 2023
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In this work, a deep learning approach proposed by Valensise et al. [3] for extracting Raman resonant spectra from measured broadband CARS spectra was explored to see how effective it is at removing NRB from our experimentally measured "spectral-focusing"-based approach to CARS. A large dataset of realistic simulated CARS spectra was used to train a model capable of performing… more Full Text: Deep learning for removal of non-resonant background in CARS hyperspectroscopy A thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Art and Science Trent …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Connecting academia to industry is one important way to advance towards meeting the United Nations (UN) Sustainability Goals (SDGs).1 Sustainability can be applied to all industrial sectors with the SDGs being implemented by 2030.2 This research contributes to the SDGs by investigating a way to remediate an industrial waste stream in the egg-breaking industry. If adopted, this would… more Full Text: Extraction and Characterization of Hyaluronic Acid and Collagen from Eggshell Membrane Waste: An Industrial Recycling Process A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Scotland, Kevin, Thesis advisor (ths): Vreugdenhil, Andrew J, Degree committee member (dgc): Zenkina, Olena, Degree committee member (dgc): Parnis, Mark, Degree committee member (dgc): Zelisko, Paul, Degree committee member (dgc): Atkinson, Bill, Degree granting institution (dgg): Trent University Abstract: <p>This thesis describes the synthesis, application and evaluation of a UV crosslinked 3-methacryloxypropyltrimethoxysilane-derived coating formulation. This is a two-component sol-gel system with 3-methacryloxypropyltrimethoxysilane (MaPTMS) and tetraethoxysilane (TEOS). Herein we show that if we change the co-solvent required for solubilizing MaPTMS from the more common methanol and… more Full Text: UV-Curable hybrid sol-gel materials: The development and application of a 3methacryloxypropytrimethoxysilanederived coating A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctorate of …
Year: 2021, 2021
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Cole, Ryan, Thesis advisor (ths): Slepkov, Aaron D, Degree committee member (dgc): Atkinson, Bill, Degree committee member (dgc): Vreugdenhil, Andrew, Degree committee member (dgc): Tamblyn, Isaac, Degree granting institution (dgg): Trent University Abstract: <p>Spectral-focusing-based coherent anti-Stokes Raman scattering (SF-CARS) microscopy is a powerful imaging technique that involves temporally and spectrally stretching ultrashort laser pulses and controlling their frequency-time characteristics. However, a broader and more detailed understanding of the frequency-time characteristics of the laser pulses and signals involved, how they are… more Full Text: FREQUENCY-TIME AND POLARIZATION CONSIDERATIONS IN SPECTRAL-FOCUSING-BASED CARS MICROSCOPY A THESIS SUBMITTED TO THE COMMITTEE ON GRADUATE STUDIES IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN THE FACULTY OF ARTS AND …
Year: 2020, 2020
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The human cornea is required to exhibit specific material properties to maintain its regular shape under typical intraocular pressures which then allow for its correct optical functionality. In this thesis, the basis of continuum solid mechanics and the finite element method are introduced. We use finite element modelling to simulate the extension of an effective-1d, linear-elastic bar,… more Full Text: The Adoption of a Finite Element Model of Material Deformation Relevant to Studying Corneal Biomechanics A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty …
Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Kallikragas, Dimitrios Theofanis, Thesis advisor (ths): Svishchev, Igor M, Degree committee member (dgc): Atkinson, Bill, Degree committee member (dgc): Kisch, Joey, Degree committee member (dgc): Chkrebtii, Anatoli, Degree granting institution (dgg): Trent University Abstract: <p>Supercritical water (SCW) exhibits unique properties that differentiates it from its low temperature behaviour. Hydrogen bonding is dramatically reduced, there is no phase boundary between liquid and gaseous states, heat capacity increases, and there is a drastic reduction of the dielectric constant. Efforts are underway for researchers to harness these properties in the applications of… more Full Text: Supercritical Water Chemistry: Molecular Dynamics Simulations and Flow Reactor Studies A Thesis Submitted to the Committee of Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and …
Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Activated Carbon (AC) is commonly produced by gasification, but there has been increasing interest in chemical activation due to its lower activation temperatures and higher yields. Phosphoric acid, in particular, succeeds in both these areas. Phosphoric acid activated carbon (PAC) can be environmentally sustainable, and economically favourable, when the phosphoric acid used in the… more Full Text: Phosphoric Acid Chemically Activated Waste Wood: Production, Modification and Selenite and Selenate Adsorption A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements For the Degree of Master of Science in the …
Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>We build a theoretical model for exploring the electronic properties of the two-dimensional (2D) electron gas that forms at the interface between insulating SrTiO3 (STO) and a number of perovskite materials including LaTiO3, LaAlO3, and GdTiO3. The model treats conduction electrons within a tight-binding approximation, and the dielectric polarization via a Landau-Devonshire free energy… more Full Text: THE ROLE OF DIELECTRIC SCREENING IN SrTiO3-BASED INTERFACES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the Faculty of Arts and Science Trent University …
Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Porquez, Jeremy, Thesis advisor (ths): Slepkov, Aaron D, Degree committee member (dgc): Wortis, Rachel, Degree committee member (dgc): Gaspari, Franco, Degree committee member (dgc): Côté, Daniel, Degree granting institution (dgg): Trent University Abstract: <p>I have developed and improved a coherent anti-Stokes Raman scattering (CARS) microscope based on the spectral focusing (SF) technique. The CARS microscope uses an 800 nm oscillator and a photonic crystal fibre module to generate the supercontinuum Stokes. The photonic crystal fibre was originally designed to generate light beyond 945 nm which is useful for CARS microscopy in the CH/OH… more Full Text: ADVANCED BROADBAND CARS MICROSCOPY BASED ON A SUPERCONTINUUM-GENERATING PHOTONIC CRYSTAL FIBER A THESIS SUBMITTED TO THE COMMITTEE ON GRADUATE STUDIES IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY IN THE FACULTY OF ARTS …
Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>In 2004 it was discovered that a two-dimensional electron gas (2DEG) forms at the interface between lanthanum aluminate (LAO) and strontium titanate (STO). This 2DEG exhibits a variety of electronic and magnetic phenomena, motivating intense research into its applicability to electronic devices. Over the years several models have been developed in theoretical exploration of this system.… more Full Text: Modelling the Lanthanum Aluminate-Strontium Titanate Interface with a Modified Transverse Ising Model A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2019, 2019
Member of: Trent University Graduate Thesis Collection
Abstract: <p>S. Johri and R. Bhatt developed a real-space renormalization group approach aimed at extracting the localized single-particle eigenstates of the Anderson model from a large system by identifying clusters of resonant site potentials. E. Campbell generalized this real-space renormalization group approach using standard perturbation theory. Both approaches were intended to approximate the… more Full Text: A CLUSTER APPROACH APPLIED TO THE ONE-DIMENSIONAL ANDERSON-HUBBARD MODEL A Thesis submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science Trent …
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Many of the most interesting electronic behaviours currently being studied are associated with strong correlations. In addition, many of these materials are disordered either intrinsically or due to doping. Solving interacting systems exactly is extremely computationally expensive, and approximate techniques developed for strongly correlated systems are not easily adapted to include… more Full Text: Real-space renormalization group approach to the Anderson model A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Arts and Science Trent University …
Year: 2017, 2017
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Stotesbury, Theresa E., Thesis advisor (ths): Wilson, Paul, Thesis advisor (ths): Vreugdenhil, Andrew, Degree committee member (dgc): Illes, Mike, Degree committee member (dgc): Easton, Brad, Degree granting institution (dgg): Trent University Abstract: <p>The research and development of synthetic blood substitutes is a reported need within the forensic community. This work contributes to the growing body of knowledge in bloodstain pattern analysis by offering a materials science approach to designing, producing and testing synthetic forensic blood substitutes. A key deliverable from this research is the creation of a robust silicon-based… more Full Text: 0&)& ,+0,) $") --/, %1,1%" !"3"),-*"+1,# #,/"+0& ),,!02 01&121"0 !@NDBI JIND?@M …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The appearance of a two-dimensional electron gas (2DEG) in oxide interfaces between strontium titanate (STO) and other materials has become a major area of study. The behaviour of the 2DEG in STO is not well understood in part because the dielectric properties of STO are not well characterized. The differential susceptibility has a major impact on the electric fields within strontium… more Full Text: A Model for the Differential Susceptibility of Strontium Titanate A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Art and Science Trent University …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The present thesis explores the cold flow properties of biodiesel and the effect of vegetable oil derived compounds on the crystallization path as well as the mechanisms at play at different stages and length scales. Model systems including triacylglycerol (TAG) oils and their derivatives, and a polymer were tested with biodiesel. The goal was to acquire the fundamental knowledge that… more Full Text: MITIGATING COLD FLOW PROBLEMS OF BIODIESEL: STRATEGIES WITH ADDITIVES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Doctor of Philosophy in the Faculty of Arts and Science TRENT UNIVERSITY …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis explores the use of 1-butene cross metathesized palm oil (PMTAG) as a feedstock for preparation of polyols which can be used to prepare rigid and flexible polyurethane foams. PMTAG is advantageous over its precursor feedstock, palm oil, for synthesizing polyols, especially for the preparation of rigid foams, because of the reduction of dangling chain effects associated with… more Full Text: Synthesis of Lipid Based Polyols from 1-butene Metathesized Palm Oil for Use in Polyurethane Foam Applications A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Doctor of Philosophy in the Faculty …
Year: 2016, 2016
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Structure-property relationships are increasingly valued for the identification of specifically engineered materials with properties optimized for targeted application(s). In this work, linear and branched diesters for use in lubricant formulations are prepared from lipid-based oleochemicals and their structure-property relationships reported. It is shown that the branched diesters… more Full Text: NOVEL ALIPHATIC LIPID-BASED DIESTERS FOR USE IN LUBRICANT FORMULATIONS: STRUCTURE PROPERTY INVESTIGATIONS A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of Philosophy in the …
Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Vegetable oils represent an ideal and renewable feedstock for the synthesis of a variety of functional materials. However, without financial incentive or unique applications motivating a switch, commercial products continue to be manufactured from petrochemical resources. Two different families of high value, functional materials synthesized from vegetable oils were studied. These… more Full Text: NOVEL FUNCTIONAL MATERIALS FROM RENEWABLE LIPIDS: AMPHIPHILIC ANTIMICROBIAL POLYMERS AND LATENT HEAT THERMAL ENERGY STORAGE A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Doctor of …
Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Johri and Bhatt found singular behavior near the band edge in the density of states as well as in the inverse participation ratio of the Anderson model. These singularities mark a transition to an energy range dominated by resonant states. We study the interacting case using an ensemble of two-site Anderson-Hubbard systems. We find the ensemble-averaged density of states and generalized… more Full Text: Correlating density of states features with localization strength in disordered interacting systems A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
Year: 2015, 2015
Member of: Trent University Graduate Thesis Collection
Abstract: <p>There is an increasing global need for grid scale electrical energy storage to handle the implementation of intermittent renewable energy sources. Adiabatic compressed air energy storage is an emerging technology with similar performance to pumped hydro except it has the issue of heat loss during the compression stage. Previously, it has been considered to use sensible heat storage… more Full Text: INVESTIGATION OF USING PHASE CHANGE MATERIALS FOR THERMAL ENERGY STORAGE IN ADIABATIC COMPRESSED AIR ENERGY STORAGE A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Kallikragas, Dimitrios Theofanis, Thesis advisor (ths): Svishchev, Igor M, Degree committee member (dgc): Atkinson, Bill, Degree committee member (dgc): Tremiane, Peter, Degree committee member (dgc): Chkrebtii, Anatoli, Degree granting institution (dgg): Trent University Abstract: <p>Supercritical water (SCW) is the intended heat transfer fluid and potential neutron moderator in the proposed GEN-IV Supercritical Water Cooled Reactor (SCWR). The oxidative environment poses challenges in choosing appropriate design materials, and the</p><p>behaviour of SCW within crevices of the passivation layer is needed for developing a corrosion control strategy to… more Full Text: Molecular Dynamics Simulations of Aqueous and Confined Systems Relevant to the Supercritical Water Cooled Nuclear Reactor A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>Experiments have observed a two-dimensional electron gas at the interface of two insulating oxides: strontium titanate (SrTiO<sub>3</sub>) and lanthanum aluminate (LaAlO<sub>3</sub>). These interfaces exhibit metallic, superconducting, and magnetic behaviours, which are strongly affected by impurities. Motivated by experiments, we introduce a simple model in which… more Full Text: TWO-DIMENSIONAL CONDUCTIVITY AT LaAlO3/SrTiO3 INTERFACES A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Art and Science Trent University …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Abstract: <p>The typical contrast mechanism employed in multimodal CARS microscopy involves the use of other nonlinear imaging modalities such as two-photon excitation fluorescence (TPEF) microscopy and second harmonic generation (SHG) microscopy to produce a molecule-specific pseudocolor image. In this work, I explore the use of unsupervised multivariate statistical analysis tools such as Principal… more Full Text: “Multimodal Contrast” from the Multivariate Analysis of Hyperspectral CARS Images A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of Art and Science …
Year: 2014, 2014
Member of: Trent University Graduate Thesis Collection
Name(s): Creator (cre): Ugray, Lisa Madeleine, Thesis advisor (ths): Shiell, Ralph C, Degree committee member (dgc): Shiell, Ralph C, Degree committee member (dgc): Slepkov, Aaron, Degree committee member (dgc): Gaspari, Franco, Degree granting institution (dgg): Trent University Abstract: <p>This thesis is divided into two parts, each of which supports constructing and using a lithium magneto-optical trap for cold collision studies:</p><p>Part I</p><p>One outgoing channel of interest from cold collisions is the production of ion pairs. We describe an effective method for calculating bound-to-continuum cross-sections for charged binary systems by… more Full Text: Heavy Rydberg Photo-dissociation Cross-section Calculations and Experimental Progress Towards Cold Collisions in Lithium TRENT UNIVERSITY Peterborough, Ontario, Canada c 2013 Lisa Madeleine Ugray, some rights reserved. This work is released under a …
Year: 2011, 2011
Member of: Trent University Graduate Thesis Collection
Abstract: <p>This thesis comprises two parts:Part I describes a method to improve the accuracy with which the polarization
state of light can be characterized by the rotating quarter-wave plate technique.
Through detailed analysis, verified by experiment, we determine the positions of the
optic axes of the retarder and linear polarizer, and the wave plate retardance, to
better than 1° for typical… more Full Text: Precision Measurements Using Semiconductor Light Sources: Applications in Polarimetry and Spectroscopy A Thesis Submitted to the Committee on Graduate Studies in Partial Fulfillment of the Requirements for the Degree of Master of Science in the Faculty of …
