Sökning: "three-dimensional electron diffraction"

Visar resultat 11 - 15 av 35 avhandlingar innehållade orden three-dimensional electron diffraction.

  1. 11. A structural study into the boundary surface and associated curvature of three-dimensional mesoporous silica crystals

    Författare :Keiichi Miyasaka; Osamu Terasaki; Reinhard Nesper; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; mesoporous crystal; electron crystallography; electrostatic potential map; equi-potential surface; curvature; multiplly-twinned particle; Chemistry; Kemi; Structural Chemistry; strukturkemi;

    Sammanfattning : Since their first discovery in the early 1990s, mesoporous crystals (MCs) have fascinated researchers in various fields because of their interesting structures and their potential uses. Electron crystallography (EC) gives the direct three-dimensional (3D) realization of a crystal as a reconstructed electrostatic potential map (EPM). LÄS MER

  3. 12. Unraveling the structures of complex nanocrystalline materials by combining TEM and XRPD – development and application

    Författare :Magdalena Ola Cichocka; Xiaodong Zou; Joke Hadermann; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Structure determination; 3D electron diffraction; Complex materials; X-ray powder diffraction; Transmission electron microscopy; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : Knowledge of the three-dimensional (3D) atomic structure of materials is essential to a fundamental understanding of their properties. The key to understanding the functionality of many materials, particularly those of commercial and industrial interest, is often hidden in the details at the nanoscale. LÄS MER

  4. 13. On Surface Characteristics and Microstructural Development of Soft Magnetic Composite Powder and Components

    Författare :Christos Oikonomou; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; X-ray photoelectron spectroscopy; compaction; annealing; X-ray diffraction; soft magnetic composites; high resolution scanning electron microscopy; surface layers; magnetic testing; powder metallurgy; depth profiling; electron backscatter diffraction; focused ion beam; thickness determination; energy dispersive X-ray spectroscopy; microstructure;

    Sammanfattning : Soft Magnetic Composite (SMC) products manufactured by traditional Powder Metallurgical (PM) techniques, are strong candidate materials for electromagnetic applications. Their advantages are based on cost and energy efficient production methods, shape complexity realization and uniquely uniform and isotropic three dimensional (3D) magnetic properties. LÄS MER

  5. 14. Simulations of Biomolecular Fragmentation and Diffraction with Ultrafast X-ray Lasers

    Författare :Christofer Östlin; Carl Caleman; Nicusor Timneanu; Helmut Grubmüller; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray free-electron laser; X-ray imaging; Single particle imaging; Computer simulation; Radiation damage; Molecular dynamics; Diffraction theory; Coulomb explosion; Sample heterogeneity; Diffractive noise; XFEL; SPI; Physics with specialization in Biophysics; Fysik med inriktning mot biofysik;

    Sammanfattning : Studies of biomolecules have recently seen substantial developments. New X-ray lasers allow for high-resolution imaging of protein crystals too small for conventional X-ray crystallography. Even structures of single particles have been determined at lower resolutions with these new sources. LÄS MER

  7. 15. Structural study of nano-structured materials: electron crystallography approaches

    Författare :Yanhang Ma; Peter Oleynikov; Osamu Terasaki; Reine Wallenberg; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; structural analysis; electron crystallography; 3D EDT; HRTEM imaging; defects; Inorganic Chemistry; oorganisk kemi;

    Sammanfattning : The structural analysis serves as a bridge to link the structure of materials to their properties. Revealing the structure details allows a better understanding on the growth mechanisms and properties of materials, and a further designed synthesis of functional materials. LÄS MER