Transmission electron microscopy high-resolution imaging

Fig. 1.9. Dislocation core in A1 as seen experimentally using high-resolution transmission electron microscopy (a) and image simulation of results of atomistic simulation using embedded-atom potentials (b) (adapted from Mills et al. (1994)).

High Resolution Transmission Electron microscopy (HR-TEM) images were recorded on a Philips CM-30 microscope operated at 250 kV. The films were scratched from the substrate. The collected powders and flakes were grinded and dispersed in ethanol. Then the suspensions were dropped gently to a holey amorphous carbon film on a Ni or Cu grid. The Particle size distribution (PSD) was obtained by measuring 100 particles from the TEM micrographs. The mean... 

Fig. 1.2 Aberration-corrected high-resolution transmission electron microscopy (HR-TEM) images of HIF-Pt/C catalysts, showing the high density of atomic steps [33]...

However, high-resolution transmission electron microscopy (HRTEM) produces images of structure, of which Figure 3.28(f) is a very good example. An analysis of structure within Figure 3.28(f) shows how complex is this structure with defective graphene layers, of different dimensions and shapes ail co-bonded in close proximity to each other to create the spaces between the graphene layers, called the microporosity. 

Figure 6 High-resolution transmission electron microscopy image of an epitaxial thin film of Y Ba2Cu307 j, grown on LaAI03, shown in cross section. (Courtesy of T. E. MKchell, Los Alamos National Laboratory)...

Oshida, K., Kogiso, K., Matsubayashi, K., Takeuchi, K., Kobayashi, S., Endo, M., Dressclhaus, M. S., Drcsselhaus, G., Analysis of pore structure of activated carbon fibers using high resolution transmission electron microscopy and image processing, 7. Mater. Res., 1995, 10(10), 2507 2517. 

The length and the diameter of MWCNT can be measured directly by TEM. From high-resolution transmission electron microscopy (HRTEM) images exhibiting oo.l fringes follows the number of coaxial tubes and possibly the microstructure of the caps in MWCNT, as viewed along the incident electron beam [24], Also anomalous intercylinder spacings and defects are revealed in this way [1,11]. 

Ag-core/Au-shell bimetallic nanoparticles were prepared by NaBH4 reduction method [124]. UV-Vis spectra were recorded and compared with various ratios of AuAg alloy nanoparticles. The UV-Vis spectra of bimetallic nanoparticles suggested the formation of core/shell structure. Furthermore, the high-resolution transmission electron microscopy (HRTEM) image of the nanoparticles confirmed the core/shell type configuration directly. 

Figure 15.1 High resolution transmission electron microscopy images (HR-TEM) of 5 wt% Pd (a) and 50 wt% Pt-Ru (b) particles supported on carbon supports of the Sibunit family with surface areas of about 6m g (a) and 72m g (b). (c) Fourier-transformed image of (b). ((a) Reprinted from Pronkin et al. [2007], Copyright 2007, with permission from Elsevier, (b) and (c) reprinted from Gavrilov et al. [2007]—Reproduced by permission of the PCCP Owner Societies.)...

Kohler-Redlich, P. Mayer, J. (2002) Quantitative Analytical Transmission Electron Microscopy, in High-Resolution Imaging and Spectrometry of Materials Ernst. F., Riihle, M., Eds., pp. 119-188, Springer, Berlin. 

High Resolution Transmission Electron Microscopy (HRTEM, Philips CM20, 200 kV) was applied to get structural and nanotextural information on the fibers, by imaging the profile of the aromatic carbon layers in the 002-lattice fringe mode. A carbon fiber coated with pyrolytic carbon was incorporated in epoxy resin and a transverse section obtained by ultramicrotomy was deposited on a holey carbon film. An in-house made image analysis procedure was used to get quantitative data on the composite. 

HIGH RESOLUTION TRANSMISSION ELECTRON MICROSCOPY IMAGE ANALYSIS OF DISORDERED CARBONS USED FOR ELECTROCHEMICAL STORAGE OF ENERGY... 

High resolution transmission electron microscopy (HRTEM) micrographies were performed with a JEOL JEM-3010 microscope operating at 300 kV (Cs= 0.6 mm, point resolution 1.7 A). Images were recorded with CCD camera (MultiScan model 794, Gatan, 1024 x 1024 pixels, pixel size 24 x 24 pm2). The powder samples were mixed in ethanol and then ultrasonicated for 10 min. A drop of the wet sample was placed on a copper grid and then allowed to dry for 10 min before TEM analysis. 

FIGURE 15.1 High-resolution transmission electron microscopy images of CNTs. (a) SWNT (b) MWNT (c) closed MWNT tips (MWNT tips) and (d) closed SWNT tip. The separation between the closely spaced fringes in the MWNT (b, c) is 0.34 nm, close to the spacing between graphite planes. The diameter of the SWNT (a, d) is 1.2nm. (Reprinted with permission from [8]. Copyright (1999) American Chemical... 

The transmission electron microscopy (TEM) images of a two-layer Tl-1223 film are shown in Fig. 7.12, which confirms the epitaxial nature of the annealed electrodeposited films. All films showed a significant amount of intergrowth, as shown by a high-resolution transmission electron microscopic (HRTEM) measurement in Figs. 7.12c and d of a representative two-layer... 

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