Energy-filtered TEM imaging

Fig. 34.15 (a) Calixarenes 5 and 8 used in the synthesis and self-assembly of Co NP rings (b) energy-filtered TEM image of Co NPs with CoO shells [37] (c) initial mixture of Co NPs stabilized with 5 in toluene deposited onto TEM substrate, with larger (>20 nm) NPs assembled into nanorings [18] (d) size-refined Co NPs (27 4 nm) stabilized by 5 in toluene, deposited onto TEM substrate [37] (Reprinted with permissions from the American Chemical Society and the Royal Society of Chemistry)... 

Fig. 2.42. Energy-filtered TEM (three-window method), imaging ofthe Cr distribution in the Ni-base superalloy SCI 6.

Figure 7.27. Energy-filtered TEM showing silica nanoparticles embedded within an organic coating. The conventional bright-held TEM image Geft) shows little/no contrast relative to the EF-TEM image (right).[50]...

The technique of obtaining images of specific elements, the so-called elemental maps, is another important application in EELS analysis. Energy filtered TEM (EFTEM) images can be obtained with a so-called imaging spectrometer. However, the images are not directly interpretable as chemical maps because of the nonspecific background in the EELS spectrum. 

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