Size effect in nonstoichiometric titanium monoxide and vanadium carbide nanocrystals measured by positron lifetime spectroscopy

A. A. Rempel, A.A. Valeeva, A.S. Kurlov, Gregor Klinser, Wolfgang Sprengel

Research output: Contribution to journalArticlepeer-review


A size effect in nonstoichiometric titanium monoxide TiOy and vanadium carbide VCy nanocrystals containing high concentrations of structural vacancies was detected by electronpositron 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.
Original languageEnglish
Pages (from-to)486-488
JournalMendeleev Communications
Issue number486-488
Publication statusPublished - 2019

Fields of Expertise

  • Advanced Materials Science

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