Defects and impurities in nanodiamonds: EPR, NMR and TEM study

A. I. Shames, A. M. Panich, W. Kempiński, A. E. Alexenskii, M. V. Baidakova, A. T. Dideikin, V. Yu Osipov, V. I. Siklitski, E. Osawa, M. Ozawa, A. Ya Vul'

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179 Scopus citations

Abstract

EPR, 13C NMR and TEM study of ultradisperse diamond (UDD) samples is reported. The compounds show a high concentration of paramagnetic centers (up to 1020 spin/g), which are due to structural defects (dangling C-C bonds) on the diamond cluster surface. The anomalous reduction in the spin-lattice relaxation time of 13C (from several hours in natural diamond to ∼ 150 ms in UDD clusters) is attributed to the interaction between the unpaired electrons of the paramagnetic centers and nuclear spins. 13C NMR line-width reflects the fact that the structure of the UDD surface is distorted in comparison to the 'bulk' diamond structure.

Original languageEnglish
Pages (from-to)1993-2001
Number of pages9
JournalJournal of Physics and Chemistry of Solids
Volume63
Issue number11
DOIs
StatePublished - 1 Nov 2002

Keywords

  • D. Electron paramagnetic resonance (EPR)
  • D. Nuclear magnetic resonance (NMR)

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics

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