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М. Ю. Бобик, Є. І. Боркач, В. П. Іваницький, В. І. Сабов
«Теорія формування контрасту електронно-мікроскопічних зображень аморфних речовин складного хемічного складу»
423–436 (2012)

PACS numbers: 07.78.+s, 07.79.-v, 61.05.J-, 61.43.Er, 68.37.Lp, 87.64.Bx, 87.64.Ee

The theory of formation of transmission electron microscopy images of amorphous materials and nanoscale systems of complex chemical composition is developed, taking into account both amplitude and diffraction contributions to the contrast. As shown, three electron scattering components within the limits of objective-lens aperture diaphragm are responsible for forming of contrast of electron microscopy images of such objects: elastic non-coherent, elastic coherent and inelastic background. Variations of electron microscopy images’ intensity due to elastic non-coherent scattering are determined by distribution of atomic density, changes of chemical composition, and deviation of geometrical thickness of local areas of the tested specimen. The contribution of elastic coherent scattering to the contrast of images is caused by differences in structural factors of different local areas, and contribution of inelastic background is conditioned by the differences of intensity of such a background.