Browsing Physics (Theses and Dissertations) by Title
Now showing items 132-151 of 410
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Implementation of self interaction free density functional methods and applications to dilute magnetic semiconductors
(Trinity College (Dublin, Ireland). School of Physics, 2008)The present thesis mainly deals with the implementation of self interaction free density functional methods in a numerically efficient density functional theory code SIESTA and the application of the said methods in ab-inito ... -
Implications of antiphase boundaries (APBs) on the strain relaxation and magnetotransport properties of Fe3o4 hetero-epitaxial thin films
(Trinity College (Dublin, Ireland). School of Physics, 2007)The strain relaxation and magneto transport properties of epitaxial magnetite (Fe3O4) thin films were studied. Epitaxial Fe3O4 film s were grown on MgO and MgAl2O4 substrates using an Oxygen plasma assisted Molecular beam ... -
Improved Solar Thermal Technology For Decarbonising Residential Heating
(School of Physics, Physics, 2023)The field of solar energy harvesting has emerged over the last number of years as one with considerable scope to provide clean and renewable electricity and heat. Solar Thermal (ST) technology is vital to tackle the pressing ... -
Impurities and magnetic interactions in graphene : a theoretical study
(Trinity College (Dublin, Ireland). School of Physics, 2012)Graphene is a two-dimensional carbon material that until its recent discovery was assumed not to exist in the free state. Graphene-related materials have been in the scientific limelight since then due to several key ... -
The in-situ structural characterization of layered double hydroxide materials in catalytic and biological applications
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)The overall aim of this PhD research is to understand the physical behaviours of layered double hydroxide (LDH) nanomaterials in applied environments. Two aspects of LDH-based applications were studied. Firstly, the thermal ... -
Inferring the Surface Energy Distribution of Low Dimensional Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Two dimensional nanomaterials exhibit novel and superlative properties, as such; the last decade has seen huge research interest in 2D nanomaterials. To fully exploit these properties it is essential to ... -
Influence of magnetic fields on cathodic growth of phases in acidic sulphate and acidic copper sulphate systems
(Trinity College (Dublin, Ireland). School of Physics, 2011)Industrial processes involving copper electrolysis are important in modern society. In these processes copper ions contained in aqueous solution are crystallized onto a cathode by the passage of current. Copper industry ... -
Inkjet Printed Energy Storage Systems for Electrochemical Testing and In-Situ TEM Analysis
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)Understanding of how materials store charge in supercapacitor and battery systems is fundamental to improving these classes of energy storage devices. While materials can be analysed and examined before they are incorporated ... -
Instrumentation and techniques in confocal microscopy
(Trinity College (Dublin, Ireland). School of Physics, 2007)Liquid crystal variable focal length microlenses are designed, fabricated and tested for inclusion into the confocal system. Their emerging light fields are imaged and examined. This proves a novel, efficient and thorough ... -
Interactions at nano-bio interfaces
(Trinity College (Dublin, Ireland). School of Physics, 2011)The development of new materials that can be integrated into current technologies is one of the most important challenges of today. As a result, fields such as nanotechnology and biotechnology have seen great advances. ... -
Interactions between quantum emitters in the presence of plasmonic nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2016)In this thesis the spontaneous emission, of a single quantum emitter, and the energy transfer, between a pair of quantum emitters, rates are investigated in the presence of conducting nanostructures. The competition between ... -
Interactions of Plasmonic and Dielectric Structures with 2D Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)Three separate systems of nanoparticles coupled to two-dimensional materials are studied. Each system is investigated both experimentally and numerically with FDTD simulations. The first system involves a nanoparticle-on-mirror ... -
Interface properties of Fe3O4/MgO and surface studies of Fe3O4(110)
(Trinity College (Dublin, Ireland). School of Physics, 2006)The research project described in this Ph.D. thesis can be divided into two parts. The first, consisting in the description of a new instrument, the low temperature tunneling device (LTTD), designed and built in order to ... -
Inverse Problems in Disordered Systems
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)It is a simple Quantum Mechanics problem to find the electronic conductance of a device by directly solving the Schrodinger Equation. Obviously, this is the case if and only if the underlying Hamiltonian is known, i.e., ... -
Investigating of gas sensing and diode laser frequency stabilisation using novel photonic microstructures
(Trinity College (Dublin, Ireland). School of Physics, 2010)Laser spectroscopy is nowadays a widespread research field with countless applications across multiple disciplines. In particular, the application to gas sensing in the near-infrared region significantly benefits from the ... -
Investigating the Feasibility of Photostimulation for the Development of a Low Energy-Spread Electron Microscope Source.
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)Electron microscopes use fast-moving electrons as illumination to generate high resolution images down to the atomic scale. They are a valuable tool in various research fields, from palaeontology to material science. Low ... -
Investigation into semiconductor microcavity light emitting strucutres, and the assessment of InAs/GaAs quantum dots as sources for etched microstructures
(Trinity College (Dublin, Ireland). School of Physics, 2002)The spectral, spatial, and temporal characteristics of the spontaneous light emission process are dependent on the optical environment with which the emitter interacts. Cavity structures with dimensions of the order of the ... -
An Investigation into the Accretion Processes of Young Stellar Objects
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)The way in which young stars form is complex and fascinating, and is anything but a smooth, continuous process. Studying their dramatic, and sometimes violent, early years of accreting and ejecting material is vital in ... -
Investigation of copper chloride for photonics applications
(Trinity College (Dublin, Ireland). School of Physics, 2011)Wide band gap semiconductors have found multiple applications. Being light emitters in the range of blue and UV, materials like GaN or ZnO have been applied to highly efficient blue light emitting diodes, and increasingly ... -
Investigation of electronic structure and optical properties of organic molecular semiconductor materials by X-ray spectroscopies
(Trinity College (Dublin, Ireland). School of Physics, 2009)The electronic structure of thin films of several members of the metal phthalocyanine (MPc) and metal chelate families of organic molecular semiconductors have been studied using resonant soft x-ray emission spectroscopy, ...
