Search for dissertations about: "Klaus Leifer"

Showing result 1 - 5 of 11 swedish dissertations containing the words Klaus Leifer.

  1. 1. Transmission Electron Microscopy of Graphene and Hydrated Biomaterial Nanostructures : Novel Techniques and Analysis

    Author : Sultan Akhtar; Klaus Leifer; Hilborn Jöns; Stefano Rubino; Marco Cantoni; Uppsala universitet; []
    Keywords : Graphene flakes; magnetic beads DNA coils; hydrated biomaterials; transmission electron microscopy; focused ion beam scanning electron microscopy; bright-field dark-field imaging; high resolution imaging; electron diffraction and cryogenic temperatures; Materialvetenskap; Materials Science;

    Abstract : Transmission Electron Microscopy (TEM) on light element materials and soft matters is problematic due to electron irradiation damage and low contrast. In this doctoral thesis techniques were developed to address some of those issues and successfully characterize these materials at high resolution. READ MORE

  2. 2. Towards atomically resolved magnetic measurements in the transmission electron microscope : A study of structure and magnetic moments in thin films

    Author : Hasan Ali; Klaus Leifer; Peter Van Aken; Uppsala universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Transmission electron microscope; thin films; magnetic moments; electron energy loss spectroscopy; simultaneous acquisition; electron magnetic circular dichroism; Teknisk fysik med inriktning mot materialanalys; Engineering Science with specialization in Materials Analysis;

    Abstract : The magnetic properties of thin metallic films are significantly different from the bulk properties due to the presence of interfaces. The properties shown by such thin films are influenced by the atomic level structure of the films and the interfaces. READ MORE

  3. 3. Fabrication and Applications of a Focused Ion Beam Based Nanocontact Platform for Electrical Characterization of Molecules and Particles

    Author : Tobias Blom; Klaus Leifer; Maria Strömme; Michel Calame; Uppsala universitet; []
    Keywords : Focused Ion Beam; FIB; Scanning Electron Microscopy; SEM; Nanogap electrodes; Nanostructuring; Nanofabrication; Electron Beam Lithography; Electrical characterization; Dielectrophoresis;

    Abstract : The development of new materials with novel properties plays an important role in improving our lives and welfare. Research in Nanotechnology can provide e.g. cheaper and smarter materials in applications such as energy storage and sensors. READ MORE

  4. 4. Characterization of a silica based nano/mesoporous material for adsorption application : A study of the relation between synthesis, structure and adsorption efficiency

    Author : Farnaz Ghajeri; Klaus Leifer; Anders Larsson; Uppsala universitet; []
    Keywords : ;

    Abstract : During last years the interest in large scale production of nano/mesoporous materials has increased in the industry due to benefits that these materials can provide. Silica based nanomaterials are examples of such materials with large specific surface area and pore volume where the porous structure is the key for the resulting properties leading to efficiency in e. READ MORE

  5. 5. Biosensing platforms using graphene based bioreactive nanostructures with various dimensions

    Author : Yuanyuan Han; Klaus Leifer; Jöns Hilborn; Hu Li; Boukherroub Rabah; Uppsala universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Graphene; nanoparticles; nanostructure; biosensors;

    Abstract : Nanomaterials have brought new aspects and improvements to the biosensing field due to their unique physical and chemical properties that are not shown in the bulk state. This thesis focuses on concepting, developing and testing of biosensors where nanomaterials including graphene gold nanoparticles (AuNPs) and magnetic nanoparticles (MNPs) constitute the biosensors. READ MORE