Physics (Theses and Dissertations): Recent submissions

Now showing items 121-140 of 458

    • Working Principle of Tunable PlasmonicReflect-Array Metasurfaces 

      Pelivani, Sara (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      This thesis will explore the way in which plasmonic metasurfaces, hosting nano-scale metallic resonator elements, can be used as beam-steering devices. We will propose our own devices that will demonstrate anomalous ...

    • X-ray Photoelectron Spectroscopy of Novel Ternary Materials 

      Zhussupbekova, Ainur (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      In this thesis the best synthesis conditions and compositional dependency of optoelectronic properties for novel ternary n-type amorphous Zinc Tin oxide (a-ZTO) and p-type nanocrystalline CuxCrO2 Transparent Conducting ...

    • Properties of massive stars before death 

      Allan, Andrew (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Despite their importance, there is a lot yet to be learned regarding massive stars, particularly those at late evolutionary stages. In the first of two studies presented here, we investigate a suspected very massive star ...

    • Computational and Experimental Study of Optical properties of TiO2 Arrays Fabricated via Soft Nanoimprint Lithography 

      Garcia Coindreau, Jorge Alberto (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      In this thesis the optical properties of large 1 mm2 titanium oxide (TiO2) nanoarrays and the interactions with Rhodamine 6G are studied computationally and experimentally. Three TiO2 arrays with different particle size ...

    • Development and Characterisation of a Zero-Moment Half-Metal 

      Siewierska, Katarzyna Estera (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      A dream material for spintronics would have low/zero net moment, no stray fields, high resonance frequency, low damping and be 100 % spin polarised. Such materials combine the best features of a ferromagnet and an ...

    • Viscoelastic Polymer Nanocomposites for Strain Sensing Applications 

      O'Driscoll, Daniel (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Strain sensors are a technology that have developed in parallel with the major milestones in material science over the last century. Most recently, the field of 2D materials has proven to have found a wide range of ...

    • Exfoliating Two-Dimensional Layered Materials: Solvent Interactions from First-Principles 

      Patil, Urvesh (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Two dimensional materials, such as graphene, MoS2 and hexagonal boron nitride, show wide ranging electronic and mechanical properties which make applications such as transistors, pressure sensors and protective coatings ...

    • Surface Studies of Oxidised Metals: Mo, Nb and Cu 

      Walshe, Killian (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      The atomic structure and evolution of ultra-thin film oxides is investigated for Mo, Nb and Cu using surface sensitive techniques such as scanning tunneling microscopy (STM), scanning tunneling spectroscopy (STS), low ...

    • Electrical, Mechanical & Morphological Characterisation of Nanosheet Networks 

      Gabbett, Cian Peter (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Networks of two-dimensional nanosheets have demonstrated significant promise across a host of applications that span the breadth of materials science. While this has driven research into nanosheet-based devices at a ...

    • Machine Learning for Condensed Matter Physics 

      Nelson, James Patrick (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 - ...

    • Constraining the Presence of Helium in Type Ia Supernovae 

      Skillen, Kelly Laura (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      The aim of this thesis is to investigate the possibility of visible helium features in the near-infrared region of the spectra of Type Ia supernovae, in particular a single feature thought to appear around 10250 ̊A, caused ...

    • Properties of lightweight fibrous materials made using a foam-forming technique 

      Burke, Steven (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      This thesis concerns the production and characterisation of foam-formed fibrous materials made from wood, peat fibres and spent grain. Such materials might find commercial applications for insulating purposes when produced ...

    • Optical Transmitters based on High-Order Surface Grating Lasers for Applications in Communication Systems 

      Jain, Gaurav (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Optical communication is the forefront of modern communication systems and is unarguably the leading technology for information sharing and transmission of large amounts of data over longer distances with low latency. Since ...

    • Spectroscopic and Microscopic Characterisation of Liquid Phase Exfoliated 2D Materials 

      Griffin, Aideen (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Since the experimental isolation of graphene nearly two decades ago, the research into two-dimensional materials has accelerated at a tremendous rate across a vast range of scientific and engineering fields. Liquid phase ...

    • Liquid Phase Exfoliation of 2D Materials under Ambient Conditions 

      Boland, John Brendan (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 ...

    • Connecting evolved massive stars to interacting supernovae 

      BOIAN, IOANA (Trinity College Dublin. School of Physics. Discipline of Physics, 2021)
      Massive stars and supernovae are not only remarkable objects on their own but they are closely related to many other topics in Astrophysics, such as nucleosynthesis, star formation, and gravitational waves. ...

    • An exploration of two-dimensional materials for solar energy harvesting 

      COLIBABA, STEFANA ANAIS (Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
      The rise in energy demand around the globe can only be met with sustainable and long-term reliance on alternative renewable energy sources. In this context, the goal of this thesis is to conceive a method through which ...

    • Graphene Based Membranes for Osmosis Applications 

      Akca, Sevilay (Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
      With the discovery of two-dimensional hexagonal graphene (single layer of graphite), a tremendous interest has grown due its remarkable properties. Apart from all other properties, its superior thickness (one-atom thick) ...

    • The winds of low-mass stars and solar-wind evolution 

      Ó FIONNAGÁIN, DÚALTA AODH (Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
      Stellar winds affect the evolution of stars (as well as impacting the planets orbiting these stars) through the removal of angular momentum and mass over time. This process changes the rotation rate of the host star, which ...

    • The solar origins and earth impacts of space weather 

      GARTON, TADHG MARK (Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
      Coronal Holes (CHs) are expansive, low density, open magnetic field regions which appear dark in extreme-ultraviolet (EUV) images of the solar corona. CHs are associated with the acceleration of the high speed solar wind ...