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Now showing items 229-248 of 310

  • Scanning near-field microscopy of microwave circuits 

    Kantor, Roman (Trinity College (Dublin, Ireland). School of Physics, 2002)
    The topic of this thesis is the development and testing of measurement techniques for high resolution imaging of the field induced by microwave circuits in the near-field region. The theoretical aspects of the near-field ...
  • Search for magnets with properties intermediate between Nd-Fe-B and Ferrite 

    Tozman, Pelin
    The rare earth elements neodymium, samarium, terbium and dysprosium are predominantly mined in China (>95%) there wild prices fluctuations in 2011 as a result of Chinese government policies undermined confidence in the ...
  • Searching for signatures of electromagnetic cascades in the intergalactic medium initiated by blazars 

    Fallon, Lisa (Trinity College (Dublin, Ireland). School of Physics, 2012)
    Very high energy (VHE) y-ray astronomy has opened a new window into the Universe at the highest energies, allowing the exploration of unique astrophysical phenomena. This thesis constitutes an observational contribution ...
  • Selective gene fishing in complex genomic environments using micro-cantilevers : applications in RNAi therapy 

    Mishra, Rohit (Trinity College (Dublin, Ireland). School of Physics, 2012)
    Genes and their role in disease origins and proliferation have been of great interest for molecular medicine. Their functions and roles have been recently shown to be moderated by RNA interference (RNAi), a natural phenomenon ...
  • Self-assembled arrays of magnetic nanostructures on morphologically patterned semiconductor substrates 

    O'Dowd, Brendan (Trinity College (Dublin, Ireland). School of Physics, 2014)
    This thesis deals with the formation of morphological patterns on single-crystal semi-conductor surfaces via self-assembly processes, followed by the subsequent fabrication of magnetic nanostructures whose dimensions are ...
  • A self-contained ground-state approach for the correction of self-interaction error in approximate density-functional theory 

    MOYNIHAN, GLENN (Trinity College Dublin. School of Physics. Discipline of Physics, 2018)
    Density functional theory (DFT), in its approximate Kohn-Sham formalism, is a highly-acclaimed computational tool that affords the practical and expeditious calculation of ground-state properties of molecules and solids, ...
  • Signal quality monitoring for optical communications networks 

    Flood, Edward Anthony (Trinity College (Dublin, Ireland). School of Physics, 2010)
    The subject of this thesis is optical performance monitoring for transparent optical communications networks. To this end, a series of techniques for the characterisation of ultrashort telecommunications pulses were ...
  • Simulation and analysis of foam structure 

    Whyte, David (Trinity College (Dublin, Ireland). School of Physics, 2017)
    We use the method of bond-orientational order parameter analysis on X-ray tomographic data to investigate the interal structure of an experimental sample of ~25 000 microbubbles. By employing appropriate cutoff distances ...
  • 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 ...
  • Size Selection And Monolayer Enrichement In Liquid Exfoliated Tungsten Disulphide Dispersions. 

    SZYDLOWSKA, BEATA MARIA (Trinity College Dublin. School of Physics. Discipline of Physics, 2018)
    Since the the discovery of graphene in 2004, the scientific environment turned its great interest towards new type of nanomaterials, commonly called two dimensional (2D) layered nanomaterials. Over last 15 years, they ...
  • Solution phase silver nanostructures for ehanced localized surface plasmonic sensing 

    Charles, Denise E. (Trinity College (Dublin, Ireland). School of Physics, 2010)
    A detailed study of the Localized Surface Plasmon Resonances (LSPR) of a range of solution phase silver nanostructure sols and their refractive index sensitivity is presented. This work focuses on developing a thorough ...
  • Solution processed Group V1 transition metal dichalcogenides : a study on conductive hybrids and photoconductivity for future applications in printed electronics 

    Cunningham, Graeme (Trinity College (Dublin, Ireland). School of Physics, 2014)
    Transition metal dichalcogenides (TMDs) constitute a class of inorganic layered compound with generalised MX2 stoichiometry, where M denotes a transition metal atom and X a chalcogen atom of sulfur, selenium or tellurium ...
  • Spectroscopic studies of self-assembled plasmonic nanoparticle arrays 

    Verre, Ruggero (Trinity College (Dublin, Ireland). School of Physics, 2011)
    In this thesis an alternative self-assembled deposition technique able to produce nanoparticle (NP) arrays ordered on the macroscale is described. Stepped surfaces are produced by high temperatures annealing AI3O4 (0001) and ...
  • Spin injection, detection and magnetoresistive effects in organic systems 

    Xu, Hongjun (Trinity College (Dublin, Ireland). School of Physics, 2015)
    Because of the weak spin-orbit interaction in organic systems, very long spin lifetimes are intuitively expected. The prospect of cheap and flexible spintronics devices makes organic semiconductors an attractive class of ...
  • Spin transfer torque magnetisation switching in MgO based magnetic tunnel junctions 

    Oguz, Kaan (Trinity College (Dublin, Ireland). School of Physics, 2010)
    Magnetic tunnel junctions (MTJ) are important magnetic elements that are used as memory and sensor devices. In this thesis, first, the fundamentals of MTJs were explored by investigating different tunnel barrier materials, ...
  • 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 ...
  • Spin valves and their application 

    Kerr, Emma (Trinity College (Dublin, Ireland). School of Physics, 2006)
    The discovery of giant magnetoresistance (GMR) in the late 1980's resulted in massive interest in the deposition and characterisation of artificial layered magnetic structures. Spin valves were discovered in 1991 and have ...
  • Spin-dependent transport in multifunctional tunnel junctions 

    Caffrey, Nuala Mai (Trinity College (Dublin, Ireland). School of Physics, 2012)
    Spin-dependent tunnelling between ferromagnetic electrodes separated by insulating oxide barriers has long attracted scientific and commercial interest. In the last decade it became evident that the insulating layer was ...
  • Spin-flip inelastic electron spectroscopy 

    Hurley, Aaron (Trinity College (Dublin, Ireland). School of Physics, 2012)
    Recent experimental advances in scanning tunneling microscopy make the measurement of the conductance spectra of isolated and magnetically coupled atoms on nonmagnetic substrates possible. The typical example is that of ...
  • Stability and motion of foams and films in confined geometries 

    Drenckhan, Wiebke (Trinity College (Dublin, Ireland). School of Physics, 2005)
    The last 20 years of research in the physics of foams display the development of a thorough understanding of dry and static foams. In the realm of wet and dynamic foams, however, many interesting and puzzling effects have ...