Analytical electron microscopy of materials |
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Authors: | Johannes Heydenreich Wolfgang Rechner |
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Institution: | (1) Institute of Solid State Physics and Electron Microscopy of the Academy of Sciences of the GDR, Weinberg 2, DDR-4050 Halle/Saale, German Democratic Republic |
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Abstract: | Analytical electron microscopy enables combined crystallographic and chemical information with a high spatial resolution to be gained from microregions of electron-transparent specimens. This is reached by the combined application of imaging, diffraction and spectroscopic methods, using either a dedicated scanning transmission electron microscope or a conventional high-resolution electron microscope (having a strong objective lens) equipped with suitable X-ray or electron spectrometers. Of the diffraction methods especially the technique of convergent beam diffraction is used, yielding valuable information on crystal structures, lattice parameter changes, symmetry variations and crystal perfection, respectively. For chemical analysis, either energy-dispersive X-ray spectroscopy (EDX) is used or electron energy loss spectroscopy (EELS). Finally, high-resolution electron microscopy in the lateral resolution range of some 0.1 nm allows the reliable geometrical inspection of extreme microregions. |
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Keywords: | analytical electron microscopy energy-dispersive X-ray spectrometry electron energy loss spectrometry convergent-beam electron diffraction high-resolution electron microscopy |
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