Cathodoluminescence microscopy and spectroscopy of micro-and nanodiamonds: An implication for laboratory astrophysics

Arnold Gucsik, Hirotsugu Nishido, Kiyotaka Ninagawa, Ulrich Ott, Akira Tsuchiyama, Masahiro Kayama, Irakli Simonia, Jean Paul Boudou

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Color centers in selected micro-and nanodiamond samples were investigated by cathodoluminescence (CL) microscopy and spectroscopy at 298 K [room temperature (RT)] and 77 K [liquid-nitrogen temperature (LNT)] to assess the value of the technique for astrophysics. Nanodiamonds from meteorites were compared with synthetic diamonds made with different processes involving distinct synthesis mechanisms (chemical vapor deposition, static high pressure high temperature, detonation). A CL emission peak centered at around 540 nm at 77 K was observed in almost all of the selected diamond samples and is assigned to the dislocation defect with nitrogen atoms. Additional peaks were identified at 387 and 452 nm, which are related to the vacancy defect. In general, peak intensity at LNT at the samples was increased in comparison to RT. The results indicate a clear temperature-dependence of the spectroscopic properties of diamond. This suggests the method is a useful tool in laboratory astrophysics.

Original languageEnglish
Pages (from-to)1285-1291
Number of pages7
JournalMicroscopy and Microanalysis
Issue number6
Publication statusPublished - 2012 Dec
Externally publishedYes


  • astrophysics
  • cathodoluminescence
  • nanodiamond
  • scanning electron microscopy

ASJC Scopus subject areas

  • Instrumentation


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