Physics (Theses and Dissertations): Recent submissions

Now showing items 241-260 of 458

    • Magnetic field effects on the electrodeposition and electrodissolution of copper 

      Hinds, Gareth (Trinity College (Dublin, Ireland). School of Physics, 2001)
      The effect of a static magnetic field on the electrodeposition and electrodissolution of copper in acidified copper sulphate solution was investigated. The primary effect of the field was to increase the rate of mass ...

    • Ion outflow and soft X-ray radiation from a micro capillary discharge source and laser produced plasma 

      Hansen, Tue N. (Trinity College (Dublin, Ireland). School of Physics, 2002)
      This thesis concerns itself with the study of pulsed plasma sources. The plasma is produced either in an electrical discharge or by a laser pulse. The plasma is generated on a nanosecond time scale, after which it evolves ...

    • Deformation and Yield of Polymer Thin Films in Confined Geometries 

      BRAZIL, OWEN (Trinity College Dublin. School of Physics. Discipline of Physics, 2019)
      Polymer thin film mechanics represents a hugely promising field of research. Due to their versatility and ease of fabrication, polymer films and coatings rank among the most ubiquitous systems in all of nanotechnology. 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 ...

    • Models of wet two dimensional foams 

      DUNNE, FRIEDRICH FIONN (Trinity College Dublin. School of Physics. Discipline of Physics, 2019)
      In this thesis I used models and computer simulations to investigate the properties of two dimensional polydisperse foams from the dry limit of zero liquid fraction to the wet limit of 0.16 liquid fraction. Initially I ...

    • Morphological influences on the excited state dynamics of conjugated polymers 

      Dalton, Alan Brian (Trinity College (Dublin, Ireland). School of Physics, 2000)
      A series of soluble phenylene vinylene copolymers have been prepared by four different methods. Two of these methods use the Wittig reaction in toluene and DMF, whereas the other two were prepared by the Horner reaction ...

    • An electron paramagnetic resonance study of carbon based electronic materials 

      Collins, Michael Peter (Trinity College (Dublin, Ireland). School of Physics, 2000)
      Electron paramagnetic resonance (EPR) measurements have been made on films of hydrogenated amorphous carbon (a-C: H) and ion implanted 6H-SiC. We examine several sets of a-C: H films. The first and second sets of films ...

    • Galaxy clusters, voids and elliptical galaxies using the ROSAT PSPC 

      Carr, Michael (Trinity College (Dublin, Ireland). School of Physics, 2003)
      The ROSAT data archive contains of the order of 100,000 sources observed by the ROSAT PSPC (Position Sensitive Proportional Counter). For many sources detected with the ROSAT PSPC there is not a sufficient number of photons ...

    • Mechanical reinforcement effects of carbon nanotube polymer composites 

      Cadek, Martin (Trinity College (Dublin, Ireland). School of Physics, 2004)
      The effect of varying current density and pressure during arc-generation on the yield and purity of multi walled carbon nanotube containing carbon soot has been studied in this work. Various soots were produced and ...

    • Investigation of low voltage Fabry-Perot modulators for optical interconnect applications 

      Byrne, Declan James (Trinity College (Dublin, Ireland). School of Physics, 2001)
      Optical interconnect technology is one of the proposed solutions to the fast approaching communication bottleneck in electronic digital systems, arising from the bandwidth limitations of electrical interconnects. Optical ...

    • Multiphoton processes in a series of designer organic materials 

      Brennan, Margaret Elizabeth (Trinity College (Dublin, Ireland). School of Physics, 2002)
      Multiphoton processes in a series of promising organic materials; an endohedral metallofullerene, La@C82, carbon nanotubes and a set of axially substituted phthalocyanines have been studied.

    • Simulations of foams and liquid surfaces 

      Bradley, Kevin Geoffrey (Trinity College (Dublin, Ireland). School of Physics, 2001)
      In this thesis, we combine physics and numerical methods to describe the basic properties of foams and liquid surfaces. In Part I, we provide a brief general introduction to the subject of foam physics, detailing what a ...

    • Development and optimisation of optical interferometric techniques for surface metrology 

      Bowe, Brian (Trinity College (Dublin, Ireland). School of Physics, 2000)
      Optical surface metrology techniques offer many advantages over conventional methods. These include a greater sensitivity, improved lateral and vertical resolution, non-contact and full-field measurements and the fact that ...

    • Spin transport in magnetic nanostructures 

      Boldoba, Oscar Céspedes (Trinity College (Dublin, Ireland). School of Physics, 2005)
      The study presented in this thesis is concerned with the spin dependent transport and spin transfer in magnetic nanostructures. The first two chapters are dedicated to introduce spin-electronics, electrical transport and ...

    • Design and fabrication of a waveguiding organic double heterostructure light-emitting device : a milestone in the development of an electrically pumped polymer laser 

      Belton, Colin (Trinity College (Dublin, Ireland). School of Physics, 2003)
      The development of an electrically pumped polymer laser fabricated using simple solution processing would revolutionise the optial data storage and communications industry. In order to achieve this, a research strategy, ...

    • Optimization techniques in elastic proton-proton collisions 

      Bates, Alan T. (Trinity College (Dublin, Ireland). School of Physics, 2000)
      The proton spin puzzle has intrigued experimentalists and theorists since the surprising result from the EMC experiment at CERN in 1988, which found a smaller than expected contribution to the spin of the proton from the ...

    • Structural characterisation and Kerr magnetometry of Fe/Mo(110) epitaxial system 

      Usov, Victor (Trinity College (Dublin, Ireland). School of Physics, 2005)
      This thesis describes the investigation of the growth and magnetic properties of ultrathin Fe films on the Mo(110) surface. The surface magneto optical Kerr effect (SMOKE) setup was designed and built by author and used ...

    • Electron transport in molecular devices 

      Toher, Cormac (Trinity College (Dublin, Ireland). School of Physics, 2008)
      The study of electronic transport in molecular devices is one of much research interest, with potential applications in a range of different fields. These devices have been experimentally constructed using many different ...

    • Studies of gain and lasing in thulium doped fibres 

      Tessarin, Severino (Trinity College (Dublin, Ireland). School of Physics, 2006)
      Rare earth ions have absorption and emission lines in almost the entire transparent region of silica optical fibres, and they can be used as dopants inside the fibre core of single mode optical fibres employed for ...

    • Organic light emitting diodes - new emissive materials and device architecture 

      Strevens, Adam (Trinity College (Dublin, Ireland). School of Physics, 2007)
      Organic materials are now used for a variety of electronic devices including organic light-emitting diodes (OLEDs). However, most organic electronic display applications require more efficient red, green and blue OLEDs ...