Physics (Theses and Dissertations): Recent submissions

Now showing items 21-40 of 458

    • Star formation : protoplanetary disk evolution 

      Rodgers-Lee, Donna (Trinity College (Dublin, Ireland). School of Physics, 2017)
      This thesis focuses on the evolution of protoplanetary disks around young stellar objects using a combination of observations and simulations. Understanding protoplanetary disk evolution impacts theories of planet formation ...

    • Localized triatomic self-assembly : unveiling long-range chemical anisotropy in exfoliated black phosphorus 

      Pokle, Anuj S. (Trinity College (Dublin, Ireland). School of Physics, 2017)
      With the emergence of the two dimensional (2D) materials, the feasibility of mass-scale production has been proven by performing Liquid Phase Exfoliation (LPE), Chemical Vapour Deposition (CVD), Plasma Laser Deposition ...

    • Analytical models of single bubbles and foam 

      Murtagh, Robert P. (Trinity College (Dublin, Ireland). School of Physics, 2016)
      We investigate the use of analytic models of three-dimensional bubbles with deformable surfaces to study the energy of foams in equilibrium. While the idea of modelling the surfaces of bubbles as deformable minimal surfaces ...

    • Hybrid semiconductor quantum dot / quantum well & metal nanoparticle structures 

      Murphy, Graham P. (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Non-radiative energy transfer is an energy transfer mechanism based on dipoledipole interactions. It has come to the fore in biomedical imaging and sensing, as well as light emitting and harvesting applications. Utilising ...

    • Precise modification of 2D materials by gas ion beams 

      Maguire, Pierce (Trinity College (Dublin, Ireland). School of Physics, 2017)
      Precise modification of the geometry, stoichiometry and crystal structure of two dimensional (2D) materials will be instrumental in future nanodevice fabrication. Here, ion beams focused to a sub-nanometre scale have been ...

    • Two-dimensional nanomaterials : characterising properties and structures in real environments 

      Long, Edmund (Trinity College (Dublin, Ireland). School of Physics, 2017)
      This thesis discusses studies of several two-dimensional nanomaterials with a view to understanding their behaviour when exposed to environments similar to those they would experience in the laboratory and in applications. ...

    • Magnetic thin films for spin-transfer torque applications 

      Lau, Yong Chang (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Current-induced magnetisation reversal of a nanomagnet by spin-transfer torque (STT) is of great technological importance owing to the scalability of the switching mechanism. An application of the STT phenomenon is the ...

    • Plasmon mediated energy transfer in hybrid quantum well-quantum dot system 

      Higgins, Luke J. (Trinity College (Dublin, Ireland). School of Physics, 2016)
      In this thesis silver plasmonic arrays, fabricated using both helium-ion lithography (HIL) and electron beam lithography (EBL), on an InGaN/GaN quantum well (QW) are used to enable localised surface plasmon (LSP) enhanced ...

    • Liquid phase exfoliation of novel 2D nanomaterials 

      Hanlon, Damien (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Over the past decade, there has been a wealth of research, into two dimensional (2D) layered nanomaterials. These materials have unique properties, that can only be realized when they are reduced to the nanoscale. Following ...

    • Liquid phase exfoliation and characterisation of novel layered materials 

      Harvey, Andrew (Trinity College (Dublin, Ireland). School of Physics, 2017)
      Over the last decade, there has been a large push towards making two dimensional (2D) nanomaterials a more realistic component of industrial applications. One of the main limiting factors to this point has been the ability ...

    • The growth and characterization of Chromium-based p-type transparent conducting oxides 

      Farrell, Leo (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Two Cr-related materials Cr203 and CuCr02 are investigated as p-type transparent conducting oxides. They both have Cr in its electron configuration, a feature that is responsible for the p-type conductivity. Epitaxial Cr203 ...

    • Nanoporous anodic aluminium oxide for magnetic, mechanical and energy efficient systems 

      Esmaeily, Amir Sajad (Trinity College (Dublin, Ireland). School of Physics, 2016)
      This dissertation presents four different aspects of magnetism in relation to Anodic Aluminium Oxide (AAO) membranes. The fabrication of nanoporous AAO templates has been extensively studied in last two decades using the ...

    • Static and dynamic magnetic interactions in graphene and related materials 

      Duffy, John M. (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Since its discovery in 2004, graphene has been the recipient of both intense research and media attention. Graphene's properties reads as a list of superlatives, and its applications are vast and diverse. However, in this ...

    • Spectroscopic studies of electronic structure in pristine and defective transition metal oxides 

      Callaghan, Stephen (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Electronic structure measurements of materials in the presence of defects are inherently useful to advance our understanding of a materials properties. Within the paradigm of electromigration in Ti02 there are opportunities ...

    • TCO/Dielectric superlattice structures for the decoupling of electrical and optical properties 

      Caffrey, David (Trinity College (Dublin, Ireland). School of Physics, 2017)
      In this thesis [Transparent Conducting Oxide (TGO)/Dielectric] superlattices are discussed as a methodology for the decoupling of optical and electrical properties and for the theoretical combining of the properties of ...

    • Multifaceted sensors based on conductive nanocomposites 

      Boland, Conor S. (Trinity College (Dublin, Ireland). School of Physics, 2016)
      With such superlative properties, nanomaterials have been of great interest in recent times and have undergone intense research in many disciplines for a wide variety of applications. Of particular interest, is the use of ...

    • Modelling and monitoring geomagnetically induced currents in Ireland 

      Blake, Seán (Trinity College (Dublin, Ireland). School of Physics, 2017)
      This thesis is the first detailed study of the effects of geomagnetic storms and geomagnetically induced currents (GICs) on the Irish power network. In order to better monitor geomagnetic storms in Ireland, a network of ...

    • Structures and optical properties of reconstructed Si and Ge surfaces 

      Banerjee, Soumya (Trinity College (Dublin, Ireland). School of Physics, 2016)
      An approach combining reflection anisotropy spectroscopy (RAS) measurement and hybrid density functional theory (DFT) was taken to test and model various reconstructed surfaces of group-IV semiconductors (Si and Ge) in ...

    • Sulfide Nanomaterials for Lithium- and Sodium-Ion Battery Electrodes 

      McCrystall, Mark Anthony (Trinity College Dublin. School of Physics. Discipline of Physics, 2024)
      The escalating climate crisis demands an urgent shift from fossil fuels to renewable energy sources such as wind and solar power, to reduce carbon emissions and mitigate global warming. However, the intermittent nature of ...

    • Static and Dynamic Characterisation of Exchange-Biased Mutlilayers for Magnetic Sensor Applications 

      Shortall, Brian (Trinity College Dublin. School of Physics. Discipline of Physics, 2024)
      The coupling of ferromagnetic and antiferromagnetic materials through exchange-bias has been one of the key interactions in producing magnetic sensing and memory technology since soon after the discovery of the GMR and TMR ...