Segregation Phenomena on the Crystal Surface of Chemical Compounds
| Autor: | Yu. Ya. Tomashpol’skii |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Auger electron spectroscopy Materials science 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Microanalysis Crystal Chemical bond Nanoelectronics Transmission electron microscopy Chemical physics Secondary emission 0103 physical sciences Physical and Theoretical Chemistry Diffusion (business) 0210 nano-technology |
| Zdroj: | Russian Journal of Physical Chemistry A. 92:1060-1070 |
| ISSN: | 1531-863X 0036-0244 |
| DOI: | 10.1134/s0036024418060195 |
| Popis: | The current state of the theoretical and experimental studies of changes in the chemical structure and composition caused by segregation phenomena on the surface of chemical compounds was reviewed. The review considers the experimental data obtained exclusively on single crystals, which were studied by modern instrumental methods, including in situ Auger electron spectrometry, X-ray spectral microanalysis, high-resolution scanning and transmission electron microscopy, secondary electron emission, and atomic force microscopy. The models that suggest the crystal-chemical diffusion and liquid-phase mechanisms of segregation were described. The parameters of the theory include the type of chemical bond, elastic constants, and crystal-chemical characteristics of substances. The models make it possible to predict the nature of changes in the surface composition: segregation tendency, segregant type, and degree of nonstoichiometry. A new direction in surface segregation was considered, which is promising for nanoelectronics and emission electronics. |
| Databáze: | OpenAIRE |
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