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Journal of Thermal Analysis and Calorimetry

, Volume 110, Issue 1, pp 59–63 | Cite as

Concept of chemical surface and vacancy-mediated exoemission

  • B. GorgiladzeEmail author
  • R. Vardiashvili
  • A. Sichinava
Article
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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.

Keywords

Vacancy Solid surface Chemical surface Exoelectron emission Thermostimulation Kinetic analysis Kinetics order 

Abbreviations

EE

Exoelectron emission

TSEE

Thermally stimulated exoelectron emission

TSD

Thermally stimulated desorption

STM

Scanning tunneling microscopy

References

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    Proceedings of the 13th International Symposium on Exoemission and Related Relaxation Phenomena. Latv J Phys Tech Sci. 2000; Suppl 6:9–24.Google Scholar
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    Gorgiladze B, Vardiashvili R. Normalization of kinetic equations for thermostimulated processes. J Therm Anal Calorim. 2010;100:171–6.CrossRefGoogle Scholar
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    Berger A. Photostimulated exoelectron emission from ultrahigh vacuum quenched platinum wires. J Appl Phys. 1975;46(6):2354–60.Google Scholar
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    Van Gastel R. The atomic slide puzzle. Leiden:Universal Press; 2001.Google Scholar
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    Vyazovkin S. Model-free kinetics. J Therm Anal Calorim. 2006;83:45–51.CrossRefGoogle Scholar

Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2011

Authors and Affiliations

  1. 1.Technical University of GeorgiaTbilisiGeorgia
  2. 2.Tbilisi State UniversityTbilisiGeorgia
  3. 3.Ilia Vekua Sokhumi Institute of Physics and TechnologyTbilisiGeorgia

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