Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

High-resolution transmission electron spectroscopy

High Resolution Transmission Electron Spectroscopy High Temperature Shift (in WGS)... [Pg.276]

HRTEM High Resolution Transmission Electron Spectroscopy... [Pg.388]

HRTEM High-resolution transmission electron spectroscopy... [Pg.173]

Microporous nanoparticles with ordered zeolitic structure such as Ti-Beta are used for incorporation into walls or deposition into pores of mesoporous materials to form the micro/mesoporous composite materials [1-3], Microporous particles need to be small enough to be successfully incorporated in the composite structure. This means that the zeolite synthesis has to be stopped as soon as the particles exhibit ordered zeolitic structure. To study the growth of Ti-Beta particles we used 29Si solid-state and liquid-state NMR spectroscopy combined with x-ray powder diffraction (XRPD) and high-resolution transmission electron microscopy (HRTEM). With these techniques we monitored zeolite formation from the initial precursor gel to the final Ti-Beta product. [Pg.65]

Key words Heterogeneous catalysts High-resolution transmission electron microscopy Electron diffraction Electron energy-loss spectroscopy... [Pg.473]

During investigations we were analyzing samples by methods of X-ray diffraction, electron scanning microscopy, microprobe analysis, atomic force microscopy, high-resolution transmission electron microscopy with preliminary attracting of the another methods including optical microscopy, Raman spectroscopy, thermal analysis and some of others. [Pg.523]

In the already briefly mentioned paper, Friedrichs et al. [26] carried out very elegant HRTEM (high-resolution transmission electron microscopy) and XPS (X-ray photoelectron spectroscopy) studies of the initial stages of the formation of MgO/ Mg(OH) on the ball-milled nanocrystalline MgH (BM-MgH ) and Mg (BM-Mg) powders, the latter obtained after hydrogen desorption of the former with particle... [Pg.146]

The basal spacing (d 001) (DRX-Kristalloflex-805 Siemens) and the surface area (Micromeritics ASAP 2400) was obtained on the solids calcined at different temperatures. X-Ray diffraction patterns have also been obtained after ethylenglycol saturation of selected samples. High resolution transmission electron microscopy (HREM) was performed (Jeol 100 CX Temscan) on ultrathin preparations (LKB Ultratome type 8802A). TPD (NH3) and infrared spectroscopy (pyridine) allowed to evaluate the acid properties of the solid calcined at 4(X) and 600°C. [Pg.98]

In this review, the relationships between structure, morphology, and surface reactivity of microcrystals of oxides and halides are assessed. The investigated systems we discuss include alkali halides, alkaline earth oxides, NiO, CoO, NiO-MgO, CoO-MgO solid solutions, ZnO, spinels, cuprous oxide, chromia, ferric oxide, alumina, lanthana, perovskites, anatase, rutile, and chromia/silica. A combination of high-resolution transmission electron microscopy with vibrational spectroscopy of adsorbed probes and of reaction intermediates and calorimetric methods was used to characterize the surface properties. A few examples of reactions catalyzed by oxides are also reported. 2001... [Pg.265]

Li et al. made extraordinarily perfect artificial c-axis twist bicrystal junctions.[3] These junctions were extensively characterized using high resolution transmission electron microscopy (HRTEM), electron energy loss spectroscopy, and low energy electron diffraction, etc., and the results were compared with computer simulations. [4] More recently, off-axis electron holography provided compelling evidence of the remarkable atomic perfection and reproducibility of the twist junctions.[5]... [Pg.43]

Figure 7.9. Interface between a solidified non-reactive Fe-Si alloy and monocrystalline a-SiC (for this alloyd 40°(Kalogeropoulouetal. 1995)). Top high resolution transmission electron Micrograph showing that the interface is sharp at the atomic scale. Bottom Fe concentration profile across the interface. The thickness of the chemical interface is the 1.5 nm resolution of the technique (electron energy-loss spectroscopy). Reprinted from (Lamy, private communication) with kind permission. Figure 7.9. Interface between a solidified non-reactive Fe-Si alloy and monocrystalline a-SiC (for this alloyd 40°(Kalogeropoulouetal. 1995)). Top high resolution transmission electron Micrograph showing that the interface is sharp at the atomic scale. Bottom Fe concentration profile across the interface. The thickness of the chemical interface is the 1.5 nm resolution of the technique (electron energy-loss spectroscopy). Reprinted from (Lamy, private communication) with kind permission.
See other pages where High-resolution transmission electron spectroscopy is mentioned: [Pg.170]    [Pg.406]    [Pg.56]    [Pg.1045]    [Pg.189]    [Pg.170]    [Pg.406]    [Pg.56]    [Pg.1045]    [Pg.189]    [Pg.85]    [Pg.172]    [Pg.159]    [Pg.45]    [Pg.163]    [Pg.382]    [Pg.65]    [Pg.213]    [Pg.289]    [Pg.89]    [Pg.10]    [Pg.415]    [Pg.77]    [Pg.397]    [Pg.221]    [Pg.23]    [Pg.547]    [Pg.264]    [Pg.194]    [Pg.20]    [Pg.266]    [Pg.489]    [Pg.1]    [Pg.212]    [Pg.216]    [Pg.533]    [Pg.134]    [Pg.265]    [Pg.128]    [Pg.1788]    [Pg.155]   
See also in sourсe #XX -- [ Pg.47 , Pg.375 , Pg.378 ]



SEARCH



Electron transmission spectroscopy

High resolution electron spectroscopy

High resolution transmission

High-resolution spectroscopy

High-resolution transmission electron

Resolution transmission electron

Spectroscopy transmission

Transmission electronic spectroscopy

Transmission resolution

© 2024 chempedia.info