Sökning: "Osamu Terasaki"

Visar resultat 6 - 10 av 14 avhandlingar innehållade orden Osamu Terasaki.

  1. 6. EM study of Mesoporous Crystals, Hollow Spheres and Intergrowth Tungsten Bronzes

    Författare :Miia Klingstedt; Osamu Terasaki; Margareta Sundberg; Cheuk-Wai Tai; Viveka Alfredsson; Stockholms universitet; []
    Nyckelord :Structural Chemistry; strukturkemi;

    Sammanfattning : .... LÄS MER

  3. 7. Structural and Morphological Studies of Mesoporous Crystals

    Författare :Kristina Lund; Osamu Terasaki; Sven Lidin; Lars Eriksson; Mika Lindén; Stockholms universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Chemistry; Kemi; Structural Chemistry; strukturkemi;

    Sammanfattning : Mesoporous silica and carbon have been synthesised and characterised by X-ray diffraction (XRD), transmission and scanning electron microscopy (TEM and SEM) and nitrogen adsorption. Surface structure, size and shape (morphology) of particles have been of special interest in this work. LÄS MER

  4. 8. 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

  5. 9. 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

  7. 10. Studies of inorganic crystal structures and gas adsorption process in mesoporous crystals : New approach through analysis of electron charge distribution by synchrotron powder X-ray diffraction

    Författare :Norihiro Muroyama; Osamu Terasaki; Clément Sanchez; Stockholms universitet; []
    Nyckelord :XRD; Mesoporous; Gas adsorption; Laves Phase; MEM; strukturkemi; Structural Chemistry;

    Sammanfattning : Using synchrotron powder XRD experiments, I studied (i) structures of silica mesoporous MCM-41 and MCM-48 crystals, (ii) gas adsorption processes of Ar and N2 in the mesopores of the mesoporous crystals, and (iii) bonding features of CaAl2-xZnx crystals through the analysis of electron charge density distributions. In the case of mesoporous crystals, the following two different approaches were taken depending on the number of observed X-ray reflections1. LÄS MER