Physics (Theses and Dissertations): Recent submissions
Now showing items 341-360 of 458
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Structure and Electronic Properties of Point Defects at Semiconductor Oxide Interfaces
(Trinity College (Dublin, Ireland). School of Physics, 2015)Semiconductor-oxide interfaces, particularly Si/SiO2 and Si/HfO2, are the centrepieces of transistor technology. Defects at such interfaces can massively affect device performance. Experimental studies on Si/SiO2 and Si/HfO2 ... -
Studies of radon in Ireland : outdoor levels, detector intercomparison and school remediation methods
(Trinity College (Dublin, Ireland). School of Physics, 2016)Although Ireland has a comprehensive radon strategy in place and an active research community, the rate of testing is still low. The work in this thesis aims to reduce knowledge gaps by making outdoor radon measurements, ... -
Point contact Andreev reflection and tunneling spectroscopy using high-field superconductors, topological insulators and compensated ferrrimagnets
(Trinity College (Dublin, Ireland). School of Physics, 2017)Spin electronics is a young and thriving research and technology field which relies more on the spin of the electron rather than its charge. The tunneling magnetoresistance and giant magnetoresistance effects have been ... -
Characterization, Simulation and Optimization of Surface Etched Slotted Tunable Laser Diodes
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The past decades have seen near exponential growth in internet traffic. To meet this growth, optical communication networks continue to branch deeper into network architectures, replacing electrical based communication. ... -
DEVELOPMENT OF MAGNETORESISTIVE SENSORS FOR NANOWIRE DETECTION TARGETED AT BIOLOGICAL APPLICATIONS
This research project has been focused on developing technologies for the detection of single segment and multi-segment magnetic nanowires using yoke shaped GMR sensors and TMR MgO-barrier magnetic tunnel junction sensors ... -
The structures and extents of the chromospheres of late-type stars
(Trinity College (Dublin, Ireland). School of Physics, 2015)The chromosphere is the region of a star, above what is traditionally defined as the stellar surface, from which photons freely escape. As the definition implies, this region is characterised by complexity, non-equilibrium, ... -
New materials for spin electronics
(Trinity College (Dublin, Ireland). School of Physics, 2015)Magnetic components are currently widely used in electronic devices, especially in the field of data storage. The need for downscaling the lateral dimensions of every component following Moore's law brings new challenges ... -
Nanomechanical resonators for clinical coagulation diagnostics and malaria vaccine candidates analysis
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)The development of a microcantilevers-based (MC-based) clinical diagnostic instrument that employs the dynamic mode of operation (microresonators) is presented. The device exploits microresonator arrays that are actively ... -
Size Selection And Monolayer Enrichement In Liquid Exfoliated Tungsten Disulphide Dispersions.
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Since the the discovery of graphene in 2004, the scientific environment turned its great interest towards new type of nanomaterials, commonly called two dimensional (2D) layered nanomaterials. Over last 15 years, they ... -
Corrective First-Principles Approaches for the Theoretical Spectroscopy of Transition-Metal Systems
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Density-functional theory within its practical, widespread Kohn-Sham formalism (KS-DFT), is an effective approach for providing the starting point for advanced first-principles spectroscopy simulations of molecules and ... -
Dynamic structural colur in thin film stacks and patterned nanoparticle arrays
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)In this thesis a number of metal nanostructures have been investigated for structural colour at sub-micron scales. These structures have utilised localised surface plasmon resonance (LSPR) to produce near-field interactions ... -
Development of Atmospheric PLD of Plasmonic Metal Nanoparticle Films for SERS Application
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)For the fast uptake into industrial applications, the further development of fabrication methods for nanomaterials which are inexpensive and simultaneously technologically feasible is one of the major key factors. One ... -
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 ... -
Simulation and analysis of foam structure
(Trinity College (Dublin, Ireland). School of Physics, 2017)We use the method of bond-orientational order parameter analysis on X-ray tomographic data to investigate the interal structure of an experimental sample of ~25 000 microbubbles. By employing appropriate cutoff distances ... -
Search for magnets with properties intermediate between Nd-Fe-B and Ferrite
The rare earth elements neodymium, samarium, terbium and dysprosium are predominantly mined in China (>95%) there wild prices fluctuations in 2011 as a result of Chinese government policies undermined confidence in the ... -
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 ... -
Time-resolved Spectroscopy of Charge Transfer at the Interface of Nanomaterials and Porphyrins
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)In order to optimize performance in many light-harvesting systems such as photovoltaics and photocatalysis, a fundamental comprehension of interfacial electron transfer at the interfaces of donor (D)-acceptor (A) systems ... -
Plasmonic Waveguides for Sub-wavelength Light Confinement
(Trinity College Dublin. School of Physics. Discipline of Physics, 2018)Modern electronic devices and circuits for information processing are rapidly approaching their ultimate speed and bandwidth limitations, which is an increasingly serious problem that impedes their continued use in scientific ... -
Electronic properties of doped carbon-based nanostructures
(Trinity College (Dublin, Ireland). School of Physics, 2016)Carbon-based nanostructures have been at the forefront of scientific research for the last couple of decades due to their unique properties, giving rise to many potential applications especially for electronics. Their ... -
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 ...
