aInstitute of Metallurgy, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation bInstitute of Solid State Chemistry, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, Russian Federation cNANOTECH Centre, Ural Federal University, Ekaterinburg, Russian Federation dInstitute of Materials Physics, Graz University of Technology, Graz, Austria
Abstract:
A size effect in nonstoichiometric titanium monoxide TiOy and vanadium carbide VCy nanocrystals containing high concentrations of structural vacancies was detected by electron-positron annihilation. The effect consists of a considerable increase in the positron lifetime with the specific surface area. An analysis of the intensity of a long lifetime surface component in the positron annihilation spectra and the average positron lifetime for different nonstoichiometric compounds indicated a universal character of the observed size effect.
Document Type:
Article
Language: English
Citation:
A. A. Rempel, A. A. Valeeva, A. S. Kurlov, G. Klinser, W. Sprengel, “Size effect in nonstoichiometric titanium monoxide and vanadium carbide nanocrystals measured by positron lifetime spectroscopy”, Mendeleev Commun., 29:5 (2019), 486–488
Linking options:
https://www.mathnet.ru/eng/mendc1565
https://www.mathnet.ru/eng/mendc/v29/i5/p486
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M.I. Chebanenko, D.P. Danilovich, A.A. Lobinsky, V.I. Popkov, A.A. Rempel, A.A. Valeeva, “Novel high stable electrocatalyst based on non-stoichiometric nanocrystalline niobium carbide toward effective hydrogen evolution”, International Journal of Hydrogen Energy, 46:32 (2021), 16907
A. A. Valeeva, A. A. Rempel, S. V. Rempel', S. I. Sadovnikov, A. I. Gusev, “Nonstoichiometry, structure and properties of nanocrystalline oxides, carbides and sulfides”, Russian Chem. Reviews, 90:5 (2021), 601–626
Svetlana V. Rempel, Andrey A. Rempel, Albina A. Valeeva, “Effect of Stoichiometry and Ordering on the Microstructure of Titanium Monoxide TiOy”, ACS Omega, 5:35 (2020), 22513