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Keywords:

  • diamonds;
  • EPR spectroscopy;
  • nanoparticles;
  • nitrogen vacancies;
  • photoluminescence
Thumbnail image of graphical abstract

Colored diamonds: Despite concerns that photostable luminescent nitrogen-vacancy (NV) centers do not exist in 5-nm diamonds, time-resolved luminescence experiments on weakly bound clusters of such diamonds show that NV centers can be embedded (see picture). The efficiency of NV formation scales as the fifth power of the crystal radius.