Browsing Physics (Theses and Dissertations) by Title
Now showing items 160-179 of 411
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The Jacobi-Legendre framework for Machine Learning in Materials Investigation and Discovery
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)Machine-learning models have rapidly become fundamental tools in the study of materials properties. In the past few years there has been a surge of interest in the construction of new models and descriptors to accelerate ... -
Kinematic properties of globally-propagating waves in the solar corona
(Trinity College (Dublin, Ireland). School of Physics, 2012)Globally-propagating bright fronts in the solar corona are a poorly understood phenomena despite almost 15 years of research. Here, the kinematics and morphology of these disturbances are studied using Extreme UltraViolet ... -
Laser-induced failure modes in plasmonic thin films
(Trinity College Dublin. School of Physics. Discipline of Physics, 2019)In order for the areal density of magnetic hard-drives to continue increasing, it is necessary to improve upon current recording technologies. The proposed next-generation magnetic recording process, heat-assisted magnetic ... -
Linear and nonlinear optical characterisation of self assembled nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2012) -
Linear and nonlinear optical characterisation of silicon nanowire structures
(Trinity College (Dublin, Ireland). School of Physics, 2008)The morphological and optical properties of various silicon nanowire structures were investigated. Photoluminescence was produced by all of the nanostructures and was attributed to a variety of different mechanisms. Optical ... -
Linear and nonlinear optical properties of low-dimensional structures on vicinal silicon (111) surfaces
(Trinity College (Dublin, Ireland). School of Physics, 2008) -
Liquid phase exfoliation and dispersion of two dimensional materials
(Trinity College (Dublin, Ireland). School of Physics, 2014)Over the last few years, it has become clear that due to their high surface area and novel properties, two dimensional materials will be extremely useful both for fundamental studies and for a range of applications. Previous ... -
Liquid Phase Exfoliation of 2D Materials under Ambient Conditions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)A technique developed by the Coleman group in 2008 called liquid phase exfoliation (LPE) has been shown to be effective for the delamination of any material exhibiting a layered structure. Molybdenum dioxide ... -
Liquid phase exfoliation of two dimensional crystals
(Trinity College (Dublin, Ireland). School of Physics, 2013) -
Local investigations of switchable rotaxane molecules at interfaces using atomic force microscopy
(Trinity College (Dublin, Ireland). School of Physics, 2008)Rotaxane molecules (interlocked molecules consisting of two parts bonded mechanically) have an inherent multi-stability. The relative positions of the submolecular components can be altered through external stimuli, a ... -
Localised surface plasmon mediated energy transfer in quantum dot systems
(Trinity College (Dublin, Ireland). School of Physics, 2015)Nonradiative energy transfer to metal nanoparticles (NPs) is a technique used for optical- based distance measurements which is often implemented in sensing. Both Forster resonant energy transfer (FRET) and nanometal surface ... -
Localized basis approach to many-body effects and dielectric response
(Trinity College (Dublin, Ireland). School of Physics, 2001)This thesis is a study of the optical and dielectric properties of semiconductors and insulators, and of the way in which these properties provide insight into the microscopic response of the interacting system. The central ... -
LOFAR Observations of Shocks in the Solar Corona
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)The Sun can produce large-scale energetic events such as solar flares and coronal mass ejections, which can excite shock waves that propagate from the low solar atmosphere into interplanetary space. Such shocks can result ... -
LOFAR tied-array imaging and spectroscopy of solar radio bursts
(Trinity College (Dublin, Ireland). School of Physics, 2016)The Sun is the source of the most powerful explosions in the solar system such as solar ares and coronal mass ejections (CMEs). These explosions can occur up to several times per day and they release up to 1032 ergs (1025 ... -
Low Frequency Observations of the Solar Corona using LOFAR
(Trinity College Dublin. School of Physics. Discipline of Physics, 2022)The Sun is a highly dynamic, active star, dictated by the evolution of its magnetic fields, which transition from periods of maximum activity to periods of minimum activity over an 11-year cycle. During solar maximum the ... -
Machine Learned Compact Kinetic Models for Combustion
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)Chemical kinetic models are an essential component in the development and optimisation of combustion devices through their coupling to multi-dimensional simulations such as computational fluid dynamics (CFD). Due to the ... -
Machine Learning for Condensed Matter Physics
(Trinity College Dublin. School of Physics. Discipline of Physics, 2021)This thesis is about the application of machine learning (ML) methods to a variety of problems in condensed matter physics. As condensed matter physics has large computational and experimental datasets readily available - ... -
Machine Learning for Novel Ternary Materials Discovery
(Trinity College Dublin. School of Physics. Discipline of Physics, 2024)First principles codes based on DFT are now sufficiently accurate and efficient that they can be used in the design of novel materials with specifically selected properties. Doing so requires checking whether a compound ... -
Machine-learning approaches for the enhancement of 2D and 3D electron microscopy data
(Trinity College Dublin. School of Physics. Discipline of Physics, 2023)Electron microscopy allows academic and industrial users to investigate the structure and properties of a variety of materials. However, some limitations are imposed by the instrumentation and the nature of the analyzed ... -
Magnetic and Electronic Phenomena in Oxide Interfaces, Thin Films and Heterostructures
The miniaturisation and reduction of power consumption in modern integrated circuitry and active compo- nents such as sensors and memory demands the development of novel materials. These materials must not only have ...
