scholarly journals Transmission Electron Microscopy for the Characterization of Cellulose Nanocrystals

10.5772/60985 ◽  
2015 ◽  
Author(s):  
Madhu Kaushik ◽  
Carole Fraschini ◽  
Grégory Chauve ◽  
Jean-Luc Putaux ◽  
Audrey Moores
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cellulose Nanocrystals ◽  
Transmission Electron

In-depth characterization of the aggregation state of cellulose nanocrystals through analysis of transmission electron microscopy images

2021 ◽  
Vol 254 ◽  
pp. 117271
Author(s):  
Cristina Campano ◽  
Patricio Lopez-Exposito ◽  
Laura Gonzalez-Aguilera ◽  
Ángeles Blanco ◽  
Carlos Negro
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cellulose Nanocrystals ◽  
Aggregation State ◽  
Transmission Electron ◽  
Microscopy Images

Characterization of submicrometer fluid Inclusions in minerals by Analytical/Transmission Electron Microscopy and electron diffraction

1990 ◽  
Vol 48 (4) ◽  
pp. 424-424
Author(s):  
George Guthrie ◽  
David Veblen
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Electron Microscope ◽  
Electron Diffraction ◽  
Light Microscopy ◽  
Fluid Inclusions ◽  
Energy Dispersive Spectrometer ◽  
Analytical Transmission Electron Microscopy ◽  
Transmission Electron

The nature of a geologic fluid can often be inferred from fluid-filled cavities (generally <100 μm in size) that are trapped during the growth of a mineral. A variety of techniques enables the fluids and daughter crystals (any solid precipitated from the trapped fluid) to be identified from cavities greater than a few micrometers. Many minerals, however, contain fluid inclusions smaller than a micrometer. Though inclusions this small are difficult or impossible to study by conventional techniques, they are ideally suited for study by analytical/ transmission electron microscopy (A/TEM) and electron diffraction. We have used this technique to study fluid inclusions and daughter crystals in diamond and feldspar.Inclusion-rich samples of diamond and feldspar were ion-thinned to electron transparency and examined with a Philips 420T electron microscope (120 keV) equipped with an EDAX beryllium-windowed energy dispersive spectrometer. Thin edges of the sample were perforated in areas that appeared in light microscopy to be populated densely with inclusions. In a few cases, the perforations were bound polygonal sides to which crystals (structurally and compositionally different from the host mineral) were attached (Figure 1).

Intergrowth of niobium tungsten oxides of the tetragonal tungsten bronze type

2020 ◽  
Vol 75 (11) ◽  
pp. 913-919
Author(s):  
Frank Krumeich
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Tungsten Bronze ◽  
Structural Complexity ◽  
Dark Field ◽  
Tetragonal Tungsten Bronze ◽  
Tungsten Oxides ◽  
Transmission Electron ◽  
Scanning Transmission

AbstractSince the 1970s, high-resolution transmission electron microscopy (HRTEM) is well established as the most appropriate method to explore the structural complexity of niobium tungsten oxides. Today, scanning transmission electron microscopy (STEM) represents an important alternative for performing the structural characterization of such oxides. STEM images recorded with a high-angle annular dark field (HAADF) detector provide not only information about the cation positions but also about the distribution of niobium and tungsten as the intensity is directly correlated to the local scattering potential. The applicability of this method is demonstrated here for the characterization of the real structure of Nb7W10O47.5. This sample contains well-ordered domains of Nb8W9O47 and Nb4W7O31 besides little ordered areas according to HRTEM results. Structural models for Nb4W7O31 and twinning occurring in this phase have been derived from the interpretation of HAADF-STEM images. A remarkable grain boundary between well-ordered domains of Nb4W7O31 and Nb8W9O47 has been found that contains one-dimensionally periodic features. Furthermore, short-range order observed in less ordered areas could be attributed to an intimate intergrowth of small sections of different tetragonal tungsten bronze (TTB) based structures.

scholarly journals Characterization of Amorphous Solid Dispersions and Identification of Low Levels of Crystallinity by Transmission Electron Microscopy

2021 ◽  
Author(s):  
Mark S’ari ◽  
Helen Blade ◽  
Stephen Cosgrove ◽  
Rik Drummond-Brydson ◽  
Nicole Hondow ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Solid Dispersions ◽  
Amorphous Solid ◽  
Amorphous Solid Dispersions ◽  
Transmission Electron ◽  
Low Levels

scholarly journals Microstructural and Crystallographic Characterization of Ni2+x Mn1−x Ga Alloys (x = 0.14, 0.16, 0.19, 0.22, and 0.24) by Transmission Electron Microscopy

2014 ◽  
Vol 1 (3) ◽  
pp. 239-246 ◽  
Author(s):  
Le Zhou ◽  
Anit Giri ◽  
Kyu Cho ◽  
Helge Heinrich ◽  
Bhaskar S. Majumdar ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Transmission Electron

Characterization of self-assembled Ge islands on Si(100) by atomic force microscopy and transmission electron microscopy

1998 ◽  
Vol 321 (1-2) ◽  
pp. 86-91 ◽  
Author(s):  
G Wöhl ◽  
C Schöllhorn ◽  
O.G Schmidt ◽  
K Brunner ◽  
K Eberl ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Atomic Force Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Self Assembled
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