Dark field imaging transmission electron

FIG. 9 Dark-field scanning transmission electron microscopy image of an unstained cytochrome b6f complexed with the amphiphilic short poly anions A8-75 (a C8 modified poly(acrylic acid) of 8000). Dark bar tobacco mosaic virus added as an internal standard of diameter 18 nm. Dots complexes of diameter ca. 10-15 nm. Reprinted from Ref. 71. Copyright 1998 with permission from Elsevier.)... 

Figure 5.5. A bright-field image (transmission electron microscopy) of a polyester-urethane block copolymer film that was solvent-etched and stained by iodine. The dark domains are about 30-100 A in width. Some samples exhibited variations in domain size. (Koutsky et, al, 1970.)...

Chang L, Eriedrich K, Ye L, Toro P (2009) Evaluation and visualization of the percolating networks in multi-wall carbon nanotube/epoxy composites. J Mater Sc 44 4003 Loos J, Sourly E, Lu K, de With G, van Bavel S (2009) Imaging polymer systems with high-angle armular dark field scanning transmission electron microscopy (HAADE-STEM). Macromolecules 42 2581... 

Dark field scanning transmission electron micrograph of coarse AljCuMg precipitate particles in an Al-Cu-Mg alloy. Imaged down the <100> zone axis. (Image courtesy of Nick Birbilis.)... 

Figures 4.1 la and b, respectively, are examples of dark-field and direct transmission electron micrographs of polyethylene crystals. The ability of dark-field imaging to distinguish between features of the object which differ in orientation is apparent in Fig. 4.11a. The effect of shadowing is evident in Fig. 4.11b, where those edges of the crystal which cast the shadows display sharper contrast.

Fig. 8. (a) Transmission electron micrograph of a Cu/ZnO = 30/70 binary catalyst (40) 60 A copper spheres are placed on crystalline zinc oxide network, (b) Dark field image of the copper crystallites in the area shown in the bright field image (a) obtained using the [111] reflection of copper. [Adapted with permission from J. Catal. 57, 339 (1979). Copyright (1979) Academic Press, New York.]... 

Additional information comes fixim a high-resolution transmission electron microscopy study of crystal morphology by Masse et al. [272]. From dark-field imaging crystallinity is estimated to be 50% in a film drawn to a ratio of 8-9. The aspect ratio of the crystallites is near 1.0 and their diameter is approximately 50 A. This value is considerably lower than the x-ray based value of 120 A, quoted above. The morphology is characterized as micellar , a network of oriented fibrils. 

Fig. 7.1 7 Transmission electron microscopy (a) bright-field image and (b) dark-field image indicating acicular secondary alpha " within large beta grains in the thermomechanically affected zone of the mill-annealed material, (c) Selected area diffraction pattern indicating the Burgers orientation relation between the beta and alpha phases...

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