Transmission electron microscope TEM images

Fig. Vni-3. (a) Atomic force microscope (AFM) and (b) transmission electron microscope (TEM) images of lead selenide particles grown under arachidic acid monolayers. (Pi Ref. 57.)...

The history of EM (for an overview see table Bl.17,1) can be interpreted as the development of two concepts the electron beam either illuminates a large area of tire sample ( flood-beam illumination , as in the typical transmission electron microscope (TEM) imaging using a spread-out beam) or just one point, i.e. focused to the smallest spot possible, which is then scaimed across the sample (scaiming transmission electron microscopy (STEM) or scaiming electron microscopy (SEM)). In both situations the electron beam is considered as a matter wave interacting with the sample and microscopy simply studies the interaction of the scattered electrons. 

Fig. 6. Transmission electron microscope (TEM) image of MWCNT with the open end. The cap of the tube was removed using the purification process,...

FIGURE 3.3 (a) Transmission electron microscopic (TEM) image of acrylic rubber (ACM)-siUca hybrid nanocomposite synthesized from 10 wt% of tetraethoxysilane (TEOS). (From Bandyopadhyay, A., Bhowmick, A.K., and De Sarkar, M., J. Appl. Polym. Sci., 93, 2579, 2004. Courtesy of Wiley Interscience.) Transmission electron microscopic (TEM) photographs of acrylic rubber (ACM)-silica hybrid nanocomposites prepared from (b) 30 wt% and (c) 50 wt% tetraethoxysilane (TEOS) concentrations. (From Bandyopadhyay, A., Bhowmick, A.K., and De Sarkar, M., J. Appl. Polym. Sci., 93, 2579, 2004. Courtesy of Wiley InterScience.)... 

FIGURE 4.2 Transmission electron microscopic (TEM) image of ethylene-vinyl acetate (EVA)-expanded graphite (EG) (4 wt%) nanocomposites. (From George, J.J. and Bhowmick, A.K., J. Mater. Sci., 43, 702, 2008. Courtesy of Springer.)... 

The droplet sizes of the nanoemulsions characterized by dynamic light scattering at O/S ratios between 50 0 and 70 30 and a constant water content of 90 wt% were between 200 and 220 nm, displaying a slight increase with increasing O/S ratio. Figure 6.3 shows atypical cryo-transmission electron microscope (TEM) image of an... 

Figure 9.3. Characterization of mesoporous Ti02 films templated by Pluronics block copolymers using diverse characterization techniques XRD pattern (a), transmission electron microscope (TEM) image (b), dark-field TEM image (c), and isotherms of Kr adsorption (d).The Pluronic-templated Ti02 films were calcined at 400°C (solid points) and 600°C (open points). The films were prepared according to Alberius et al. (Ref. 14).

Periodic microstructures can be corroborated by observations of wavevectors /3 in transmission electron microscope (TEM) images, particularly if the sample is oriented with the modulation waves directed perpendicular to the electron-beam direction (e.g., with the beam along [001] for a crystal with (100) modulations). 

The folded sheets appear as crystalline needles in low magnification transmission electron microscope (TEM) images, and were described as layers that fold onto themselves (Fig. 4). These... 

Photoluminescence spectra were recorded with a Perkin-Elmer LS-55 spectrometer while the UV-vis absorption spectra were recorded with UV/VIS/NIR Perkin-Elmer spectrometer. Transmission electron microscope (TEM) images were obtained using a JOEL JEM 3010 instrument. Infrared spectra were recorded with a Bruker IFS-66v spectrometer. 

Figure 13.2. Transmission electron microscope (TEM) images of (a) freeze-etched replica of a superabsorbent (b) thin section of a Sepharose gel (c) thin section of an amylose gel.

The transmission electron microscope (TEM) image from crazes in such films, the negative from which Fig. la was printed, can be analyzed not only to reveal dimensions of the craze but also to yield the local craze fibril volume fraction v by using a microdensitometer to measure the local density of the image, its mass thickness contrast The extension ratio of the craze fibrils, X equals i. ... 

Figure 4 Transmission electron microscope (TEM) image of an aggregate of NaCl and sulfate salts from a small marine particle. This particle is at the low end of the observed size range of sea salt particles. The sample was collected near Cape Grim, Tasmania, Southern Ocean during the ACE-1 experiment (source Buseck and Posfai, 1999).

The transmission electron microscope (TEM) images specimens a fraction of a micrometer or less in thickness. In a TEM, the beam passes through the q)eci-men so that some of the electrons are absorbed and seme scattered. The remaining electrons are focused ento a fluorescent screen or special photographic plates via the use of magnetic lenses. The resulting image is in black and white. 

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