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Showing result 1 - 5 of 7 swedish dissertations matching the above criteria.

  2. 1. Spectroscopic studies of III-V semiconductors in two, one and zero dimensions

    Author : Dan Hessman; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; InAs-InP; low-dimensional structures; quantum wells; quantum dots; quantum wires; k.p calculations; type-II; photoluminescence; V grooves; Stranski Krastanow; single dot spectroscopy; GaAs-InP; III-V semiconductors; Fysicumarkivet A:1996:Hessman; InAs-GaAs; GaInAs-InP; Halvledarfysik; InP-GaInP; Semiconductory physics;

    Abstract : In this thesis, spectroscopic studies of quantum wells (QWs), quantum wires (QWRs) and quantum dots (QDs) in III-V semiconductors are presented. The electronic structure of these low-dimensional structures have been studied by absorption, photocurrent, electroreflectance, photoluminescence (PL), and photoluminescence excitation (PLE) spectroscopy. READ MORE

  4. 2. Cathodoluminescence Studies of Quantum Structures and III-V nitrides

    Author : Anders Petersson; Fasta tillståndets fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; AlGaN; Fysik; Physics; GaN-AlGaN; single dot spectroscopy; InP-GaInP; Stranski Krastanow; quantum dots; quantum wires; low-dimensional structures; InAs-GaAs; III-V nitride; Cathodoluminescence; III-V semiconductors; Fysicumarkivet A:1999:Petersson;

    Abstract : Characterization of low-dimensional semiconductor structures is a challenging task. The thesis is based on experiments, using cathodoluminescence (CL) as a tool for characterization. The high spatial resolution and the possibility of spectroscopy of small structures make CL one of the most powerful techniques for these types of investigations. READ MORE

  5. 3. Molecular mechanisms of HLA associations with myasthenia gravis

    Author : Peter Hjelmström; Karolinska Institutet; Karolinska Institutet; []
    Keywords : Myasthenia gravis; MHC; HLA; T cell receptor; acetylcholine receptor; TNF-a; thymus complex disease trait; autoimmunity; molecular modelling; stratification; DNA polymorphisms;

    Abstract : Myasthenia gravis (MG) is a neuromuscular disease characterised by muscle weakness due to an autoimmune attack against the nicotinic acetylcholine receptor (nAChR). MG has a complex pattern of inheritance and several genetic and environmental factors are important in conferring susceptibility to the disease. READ MORE

  6. 4. On the influence of micro-and macroscopic surface modifications on bone integration of titanium implants

    Author : Patricia Miranda Burgos; Göteborgs universitet; []
    Keywords : titanium; dental implants; surface modification; bone tissue; biomechanics; BMP-2;

    Abstract : Background: Osseointegrated titanium implants are routinely used in clinical denstistry as anchorage units for dental prostheses. Although the overall clinical results are good, there are clinical situations when an optimized implant healing is desirable, for instance in order to shorten healing periods and to allow immediate loading. READ MORE

  7. 5. Characterization of Surfaces Relevant to Nanotechnology

    Author : Emelie Hilner; Synkrotronljusfysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; nanotechnology; surface science; semiconductors; scanning tunneling microscopy; spectroscopic photoemission and low energy electron microscopy; low energy electron diffraction;

    Abstract : In this thesis investigations of the structure and dynamics of semiconductor surfaces relevant for the synthesis of nanostructures are presented. The studies were performed using Scanning Tunneling Microscopy (STM), Low Energy Electron Diffraction (LEED), and Spectroscopic PhotoEmission and Low Energy Electron Microcopy (SPELEEM). READ MORE