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X-ray Excited Optical Luminescence of Eu in Diamond Crystals Synthesized at High Pressure High Temperature.

Vasily T LebedevFedor M ShakhovAlexander Ya Vul'Arcady A ZakharovVladimir G ZinovievVera A OrlovaEduard V Fomin
Published in: Materials (Basel, Switzerland) (2023)
Powder diamonds with integrated europium atoms were synthesized at high pressure (7.7 GPa) and temperature (1800 °C) from a mixture of pentaerythritol with pyrolyzate of diphthalocyanine (C 64 H 32 N 16 Eu) being a special precursor. In diamonds prepared by X-ray fluorescence spectroscopy, we have found a concentration of Eu atoms of 51 ± 5 ppm that is by two orders of magnitude greater than that in natural and synthetic diamonds. X-ray diffraction, SEM, X-ray exited optical luminescence, and Raman and IR spectroscopy have confirmed the formation of high-quality diamond monocrystals containing Eu and a substantial amount of nitrogen (~500 ppm). Numerical simulation has allowed us to determine the energy cost of 5.8 eV needed for the incorporation of a single Eu atom with adjacent vacancy into growing diamond crystal (528 carbons).
Keyphrases
  • high resolution
  • dual energy
  • energy transfer
  • high temperature
  • electron microscopy
  • single molecule
  • mass spectrometry
  • high speed
  • quantum dots
  • computed tomography
  • ionic liquid
  • amino acid