Physics (Theses and Dissertations): Recent submissions

Now showing items 401-420 of 458

    • Atomic scale influences on the tribology of nano to meso-scale systems 

      Annett, James (Trinity College (Dublin, Ireland). School of Physics, 2015)
      It has been known for many years that atomic scale effects can directly influence the tribological behaviour over a wide variety of contact sizes ranging from the nano-scale to macroscale. A newly developed load and depth ...

    • CrO2 : a general study 

      Barry, Amanda (Trinity College (Dublin, Ireland). School of Physics, 2000)
      The aims of this work were (i) to prepare chromium dioxide, CrO2, in thin film and powder form (ii) to study its magnetic, electronic and thermal properties and (iii) to introduce thin films of CrO2 into a multilayer device ...

    • Investigation of organic / ferromagnet interface and magnetoresistive characteristics of small molecule organic semiconductors 

      Tokuc, Huseyin (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Spin injection, transport and dynamics in organic semiconductors are of growing interest as the field of organic spin electronics begins to take shape during the last decade. This new field of research aims to manipulate ...

    • Studies of foam drainage and stability 

      Tobin, Steven T. (Trinity College (Dublin, Ireland). School of Physics, 2013)
      While the static nature of foams has been well studied, the dynamic nature of a foam how it evolves and responds to external forces and changing environments is less well understood. We will present results from the analysis ...

    • Surface-enhanced Raman spectroscopy and fluorescence spectroscopy towards detection of pterins 

      Smyth, Ciarán (Trinity College (Dublin, Ireland). School of Physics, 2013)
      In this thesis, a preliminary study is conducted into surface-enhanced Raman spectroscopy (SERS) and fluorescence spectroscopy towards the detection and analysis of pterins. Firstly, investigation of some optical properties ...

    • Study of the properties of networks of low-dimensional nanomaterials for transparent flexible device applications 

      Sorel, Sophie (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Transparent conductors (TC) - materials that are both transparent and conductive - are of great interest for modern technologies. However, a replacement is needed for the most commonly used TC, Indium tin oxide (ITO), ...

    • 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 ...

    • Mechanisms and size effects of small to large strain polymerdeformation at the molecular scale 

      Reilly, Roseanne (Trinity College (Dublin, Ireland). School of Physics, 2013)
      A core section of mechanics of materials is to understand the relationship of the mechanics to the nanoscale structure. This has been looked at in metals, ceramics, but in polymers has been virtually untouched. While micron ...

    • Interactions at nano-bio interfaces 

      Rakovich, Aliaksandra (Trinity College (Dublin, Ireland). School of Physics, 2011)
      The development of new materials that can be integrated into current technologies is one of the most important challenges of today. As a result, fields such as nanotechnology and biotechnology have seen great advances. ...

    • Ferromagnetic resonance of magnetite films and iron nanowires 

      McGuigan, Louise (Trinity College (Dublin, Ireland). School of Physics, 2010)
      Ferromagnetic resonance (FMR) measurements were carried out at 9.6 GHz on thin magnetite films and iron nanowire arrays, produced by molecular beam epitaxy (MBE). The aims of the studies were to examine how the magnetic ...

    • Optical and EUV studies of laser triggered Z-pinch discharges 

      Tobin, Isaac (Trinity College (Dublin, Ireland). School of Physics, 2014)
      This thesis describes the results of experiments with two geometries of laser assisted discharge plasma. Both devices are designed for fast Z-pinch discharge, triggered by laser produced plasma generated by ablation of one ...

    • Nanoscale effects governing mechanical reinforcement in composite materials 

      May, Peter (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Nanoscale materials have been studied extensively in the scientific research community in recent years. Due to their impressive mechanical properties, one- and two- dimensional nanomaterials have become candidates as ...

    • Micromechanical sensing for real time monitoring of filamentous fungi growth 

      Maloney, Niall (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Since the early 1990s the use of cantilevers as biosensors has risen dramatically. Advances in semiconductor fabrication technologies has resulted in the reproducible production of high quality cantilever arrays. When ...

    • Functional nanostructures self-assembled on templated surfaces 

      Lübben, Olaf (Trinity College (Dublin, Ireland). School of Physics, 2013)
      This work consists of surface studies of three systems; firstly, the growth of Fe nanoclusters on the Ge(001) surface has been studied using low-temperature scanning tunneling microscopy (STM), X-ray magnetic circular ...

    • Forster resonant energy transfer in nanocrystal quantum dot structures 

      Lunz, Manuela (Trinity College (Dublin, Ireland). School of Physics, 2010)
      Forster resonant energy transfer (FRET) is an energy transfer mechanism based on dipole-dipole interactions. FRET occurs in photosynthetic active organisms and is used in artificial structures to create energy flow in ...

    • Contact-resistivity and transport properties in lateral germanium nanowire devices 

      Koleśnik, Maria M. (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Quasi-one-dimensional materials, such as germanium nanowires, are anticipated to provide enhanced functionality for high-tech electronic and spin- tronic device components. The primary aim of this thesis is to study the ...

    • Percolaton effects in nanostructured thin films 

      King, Paul J. (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Typically, materials with high electrical conductivity such as metals are opaque, and materials with high optical transparency such as glass are insulating. Finding materials that are both transparent to visible light and ...

    • A microcantilever-based, dual-mode, quantitative sensing platform for investigation of biological interactions 

      Jensen, Jason (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Since the introduction of the atomic force microscope (AFM) and the subsequent availability of high-quality cantilevers the interest in the application of microcantilevers as biosensors has increased year-on-year. Much of ...

    • Charge and spin transport through organic semiconductors 

      Bhattacharya, Sandip (Trinity College (Dublin, Ireland). School of Physics, 2013)
      Over the past decade a great body of research has been devoted to the field of organic spintronics. This is primarily because of its potential to open new ways to cheap, low' weight, mechanically flexible, chemically inert ...

    • Ab-initio study of the electronic and vibrational properties on low-dimensional nanostructures made of layered transition metal di-chalcogenides 

      Dolui, Kapildeb (Trinity College (Dublin, Ireland). School of Physics, 2013)
      The controlled modulation of the electronic and phonon properties of low dimensional materials via external perturbations such as electric fields, doping, and strain, do represent an important step in the development of ...