Sökning: "dark field microscopy"

Visar resultat 11 - 15 av 28 avhandlingar innehållade orden dark field microscopy.

  1. 11. A TEM Investigation of Contact between Nanoparticles

    Författare :Yiming Yao; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LACBED; CBED; nanoparticles; interface; adhesion; image simulation; energy filtering; misorientation; contacting; strain field TEM;

    Sammanfattning : Interaction between nanoparticles (1~100nm) provides us with answers to fundamental questions in many important applications e.g. adhesion, friction, and cold welding. The attractive force arises from the reduction of the total free surface and thus the total surface energy due to the formation of a boundary between the contacting particles. LÄS MER

  3. 12. High-resolution characterization of TiN diffusion barrier layers

    Författare :Marlene Mühlbacher; Lars Hultman; Christian Mitterer; Lars Johnson; Linköpings universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Diffusion; TiN; Microstructure; Transmission electron microscopy; TEM; Atom probe tomography; APT;

    Sammanfattning : Titanium nitride (TiN) films are widely applied as diffusion barrier layers in microelectronic devices. The continued miniaturization of such devices not only poses new challenges to material systems design, but also puts high demands on characterization techniques. LÄS MER

  4. 13. Local structure of perovskite ferroelectric ceramics as revealed by 3D electron diffuse scattering : A walk in between the Bragg peaks

    Författare :Alexandra Neagu; Cheuk-Wai Tai; Gunnar Svensson; Kenji Kaneko; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Electron diffraction; Diffuse scattering; Local structural disorder; Perovskite; Ferroelectric ceramics; Transmission electron microscopy; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Local structural disorder in crystalline materials plays a crucial role in understanding their properties. The means to study structural disorder is diffuse scattering (DS). LÄS MER

  5. 14. Structural studies of InGaAsP/InP-based lasers : By Thomas Kallstenius

    Författare :Thomas Kallstenius; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

    Sammanfattning : Reliable buried-heterostructure (BH) InGaAsP/InP-based laser diodes (LDs) is essentialto the operation of fiber optics communication systems. In this thesis, the structural,electrical and optical properties of such LDs have been studied. The aim has been toidentify materials-related mechanisms causing gradual emission degradation. LÄS MER

  7. 15. High resolution microstructural characterization of oxide thin films and interfaces

    Författare :Nikolina Tuzla; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; oxides; Microstructure; TEM; thin films; interfaces; HAADF STEM; YSZ.; SrTiO3; 2DEG; LaAlO3; heterostructures;

    Sammanfattning : Oxide interfaces can introduce properties that are different compared to thecorresponding crystal bulk properties. The properties can be tuned by changing thestructure. It has become clear that these oxide interface systems are potentiallysuitable for future electronic devices with unique and tailored properties. LÄS MER