Physics (Theses and Dissertations): Recent submissions
Now showing items 381-400 of 458
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Third-order Nonlinear Optical Response and Ultrafast Carrier Dynanics of 2D Materials
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Two dimensional (2D) materials have been in the spotlight of scientific researchers in the last decade due to their outstanding chemical, physical, electronic, mechanical and optical properties in comparison to their bulk. ... -
Computational design of usual magnetic tunnel junctions
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018) -
A self-contained ground-state approach for the correction of self-interaction error in approximate density-functional theory
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Density functional theory (DFT), in its approximate Kohn-Sham formalism, is a highly-acclaimed computational tool that affords the practical and expeditious calculation of ground-state properties of molecules and solids, ... -
Towards data-driven magnetic materials discovery
(Trinity College Dublin. School of Physics. Discipline of Physics, 2017)Magnetic materials underpin many of the technologies that define the world we live in. Despite the tremendous technological progress, the discovery of new magnetic materials has been rather slow. In this Thesis we explore ... -
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 ... -
Development of a cantilever based device for the investigation of malaria vaccine cross-reactivity
(Trinity College (Dublin, Ireland). School of Physics, 2015)The invention of the atomic force microscope and subsequent implementation of cantilevers as transducers for sensing applications laid the foundation for the current use of cantilevers as biosensors. This application ... -
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 ... -
Tuning and characterization of self-assembled plasmonic nanoparticle arrays
(Trinity College (Dublin, Ireland). School of Physics, 2015)This thesis details the development and use of a novel nano-entity fabrication technique. The technique is based on a glancing angle deposition (GLAD) on transparent stepped templates. It is demonstrated that the technique ... -
Design and characterization of widely tunable semiconductor lasers based on etched slots
(Trinity College (Dublin, Ireland). School of Physics, 2015)Tunable semiconductor lasers play an important role in numerous technologies for optical communication and sensing systems. They are widely used in dense wavelength division multiplexed (DWDM) systems and in other important ... -
The structure and flow of disordered wet foams
(Trinity College (Dublin, Ireland). School of Physics, 2014)This thesis concerns the structure and flow properties of wet foams. We primarily use computer simulations of soft particles to model the behaviour of disordered wet foams. We investigate the properties of 2D and 3D polydis- ... -
Femtosecond laser ablation of metals
(Trinity College (Dublin, Ireland). School of Physics, 2015)Femtosecond laser ablation of metals and dielectrics is currently very topical due to its new and distinctive ablation process and the growing number of applications. The ablation process is rather complex and results in ... -
Molecular electronics: first principles and model approaches
(Trinity College (Dublin, Ireland). School of Physics, 2015)This thesis deals with the application and the development of computational tools for the study of ground state and electronic transport properties of molecular junctions. The calculations can be divided in two main ... -
Contact interface studies of metal and carbon electrodes to germanium nanowires, carbon nanotubes and thin carbon films in associated devices
(Trinity College (Dublin, Ireland). School of Physics, 2013)In current state-of-the art electronic devices the electrical contact between source- and drain-electrode plays a crucial role in the performance of the nano size devices. Especially for carbon based materials such as ... -
Electrochemical energy storage properties of solution processed nanomaterial networks
(Trinity College (Dublin, Ireland). School of Physics, 2015)Recently, exciting progress has been made towards the creation of electronic devices via unconventional fabrication routes. For example, liquid processing techniques such as printing and spraying are enabling the production ... -
A theoretical study of the strain-modified RKKY interaction in magnetically doped carbon materials
(Trinity College (Dublin, Ireland). School of Physics, 2015)Graphene-related materials continue to be in the scientific limelight due to near-continuous discoveries regarding their properties and production. The applications envisaged for these super materials are numerous and ... -
Modification and analysis of layered materials with charged particle beams
(Trinity College (Dublin, Ireland). School of Physics, 2014)In this work a range of highly focused charged particle beams were used to modify the structure and geometry of materials. Recently discovered two-dimensional (2D) materials were the focus of the work. Fundamental studies ... -
Young brown dwarfs and their environments : testing star and planet formation
(Trinity College (Dublin, Ireland). School of Physics, 2014)This thesis presents a new contribution to our understanding of the formation of brown dwarfs. From a description of their discovery, to an analysis of their disks and photospheres, it sheds new light on the conditions ... -
A considered application of the Langreth-Lundqvist van der Waals density functional in the context of : open shell molecules, atom centered basis sets, adsorption of graphene into a Bi₂Se₃ slab
(Trinity College (Dublin, Ireland). School of Physics, 2015)The work in this thesis is aimed towards exploring the edge case application of the Langreth-Lundqvist vdW density functional (vdW-DF). The increasing popularity of the vdW-DF functional has resulted in its application ... -
Cerium dioxide redox cycle for fuel production
(Trinity College (Dublin, Ireland). School of Physics, 2015)The following thesis covers a number of topics related to thermochemical fuel production using the CeO2 redox cycle. Chapter 1 gives an introduction to the topic, providing motivation, historical development and the main ... -
Theoretical study of topological insulators : models and materials
(Trinity College (Dublin, Ireland). School of Physics, 2014)Topological insulators are a fascinating new class of materials, which have signalled a revival in exploration of topological aspects of condensecl matter physics. Like usual insulators they have an energy gap separating ...
