Abstract
This article offers a new definition of the chemical surface as a locus of vacancies and introduces the distinction between the concepts of physical and chemical surfaces. It is shown that such a formalism is more suitable for the description of some superficial properties of solid-state formations than the so-called terrace–ledge–kink model. The main part of the experimental work was measurement of thermostimulated exoemission spectra resulting from vacancy-mediated migration of superficial reagents and attempts to link the measured properties with the configurations of the chemical surface. Through analysis of the experimental results and their comparison with published data, it is shown that kinetic parameters observable by exoemission spectroscopy due to superficial migration of atomic particles are more informative than the same characteristics as determined by other modern experimental methods.
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