Browsing Physics (Theses and Dissertations) by Title

Now showing items 366-385 of 417

    • A TEM Heart Transplant: The Development of a User Adjustable Pole-piece (UAP) 

      McBean, Patrick (Trinity College Dublin. School of Physics. Discipline of Physics, 2024)
      Transmission Electron Microscopes (TEMs) have massively accelerated progress in many areas of science, particularly biology and material science. Atomic-scale resolution was achieved soon after the invention of the TEM, ...

    • The complex dynamics of flowing foam 

      Sexton, Michael B. (Trinity College (Dublin, Ireland). School of Physics, 2014)
      We investigate the link between the non-linear macroscopic rheology of wet foams and the microscopic interactions at the bubble-scale, within the general framework of foams as a complex system. This rheology has been found ...

    • The evolution and space weather effects of solar coronal holes 

      Krista, Larisza D. (Trinity College (Dublin, Ireland). School of Physics, 2011)
      In recent years the role of space weather forecasting has grown tremendously as our society increasingly relies on satellite dependent technologies. As solar activity is the foremost important aspect of space weather, the ...

    • The growth, formation and magnetic behaviour of noble metal capped atomic wires 

      Duignan, Martin James (Trinity College (Dublin, Ireland). School of Physics, 2016)
      Transition metal nanostructures have been observed to have several interesting magnetic properties. Nanowire of atomic widths on a vicinal surfaces show these interesting properties clearly, which also vary with the width ...

    • The impact of protostellar jets on their environment 

      O'Connell, Barry F. (Trinity College (Dublin, Ireland). School of Physics, 2005)
      The nature of the accelerated and heated gas along collimated outflows emanating from deeply embedded protostars is investigated. By analysing the shock structures and excitation conditions it is possible to deduce information ...

    • The influence of the laser induced plasma in the pulsed laser depositon of ZnO 

      de Posada, Eduardo (Trinity College (Dublin, Ireland). School of Physics, 2005)
      The thesis is divided in three main sections, two of them Chapter 2 and 3 are devoted to the study and analysis of the laser produced plasma. Finally in the third section (Chapter 4) the conclusions obtained in the first ...

    • The kinematics and morphology of solar coronal mass ejections 

      Byrne, Jason P. (Trinity College (Dublin, Ireland). School of Physics, 2010)
      Solar coronal mass ejections (CMEs) are large-scale eruptions of plasma and magnetic field from the Sun into the corona and interplanetary space. They are the most significant drivers of adverse space weather at Earth and ...

    • The physical properties of agent-based systems 

      Sabatelli, Lorenzo (Trinity College (Dublin, Ireland). School of Physics, 2004)
      This thesis deals with the physical properties of agent-based systems. Agent models are powerful tools for understanding 'social' self¬organized systems and may provide an explanation of features typically found in many ...

    • The physico-chemical properties of fullerenes and porphyrin derivatives deposited on conducting surfaces 

      Murphy, Barry E. (Trinity College (Dublin, Ireland). School of Physics, 2014)
      In this thesis, three organic molecules are examined on three distinct surfaces by a variety of surface science techniques, foremost among them being scanning tunneling microscopy (STM). When deposited on the W02/W(110) ...

    • The structure and flow of disordered wet foams 

      O'Donovan, Cathal B. (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- ...

    • The structure of monodisperse foam 

      Meagher, Aaron J. (Trinity College (Dublin, Ireland). School of Physics, 2012)
      Equal-sized bubbles of average diameter less than one millimetre are found to spontaneously crystallise upon formation. While previously employed by Sir Laurence Bragg as an ideal system with which to study crystalline ...

    • The structures and extents of the chromospheres of late-type stars 

      Ó Riain, Neal (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, ...

    • The surface energetics of low dimensional nanomaterials 

      Ferguson, Auren (Trinity College (Dublin, Ireland). School of Physics, 2017)
      Over the past two decades, there has been great interest in the discovery and research of low dimensional nanomaterials. These materials, such as carbon nanotubes and graphene, are amongst the strongest and most conductive ...

    • The weakly coupled chiral Schwinger model on a finite lattice 

      Pinto, Carlos (Trinity College (Dublin, Ireland). School of Physics, 2000)
      The primary aim of this work is the development of a perturbative analysis of the phase structure of the lattice Schwinger model. A novel method for implementing this analysis is presented. It is shown analytically that ...

    • Theoretical and computational aspects of electronic transport at the nanoscale 

      Rocha, Alexandre Reily (Trinity College (Dublin, Ireland). School of Physics, 2007)
      The problem of electronic transport in systems comprising only a handful of atoms is one of the most exciting branches of nanoscience. The aim of this work is to address the issue of non-equilibrium transport at the ...

    • Theoretical and experimental study on electron transport in oxygen-plasma-treated monolayer MoS2 

      LI, GEN (Trinity College Dublin. School of Physics. Discipline of Physics, 2019)
      In recent years, two dimensional (2D) molybdenum disulfide (MoS2) has attracted a wide range of interest due to its interesting physics properties, such as valley electronics and quantum spin Hall effect, and its potential ...

    • Theoretical studies of carbon nanotubes interacting with magnetic atoms 

      Kirwan, David (Trinity College (Dublin, Ireland). School of Physics, 2009)
      The past twenty years have seen an enormous increase in interest in the properties of low dimensional systems. Carbon nanotubes are an example of one such system. They possess remarkable physical properties which it is ...

    • Theoretical studies of doped carbon nanotube-based materials 

      Wall, Andrew (Trinity College (Dublin, Ireland). School of Physics, 2008)
      For the last fifteen years, carbon nanotubes have piqued the interest of many in the materials research community, due to their superlative individual characteristics. One possible route to their technological exploitation ...

    • Theoretical study of topological insulators : models and materials 

      Awadhesh, Narayan (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 ...

    • Thermal and Athermal Characterisation of Slotted Semiconductor Lasers 

      Mc Kenna, Robert John (Trinity College Dublin. School of Physics. Discipline of Physics, 2022)
      Over the past few decades, the world has experienced a revolution in information and communications technologies that has affected almost every aspect of modern life. The growth in internet capabilities and services has ...