A highly porous surface of synthetic monocrystalline diamond: Effect of etching by Fe nanoparticles in hydrogen atmosphere

Aleksei Chepurov, Valery Sonin, Dmitry Shcheglov, Alexander Latyshev, Evgeny Filatov, Alexander Yelisseyev

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

We studied the etching of surface of synthetic monocrystalline diamond by Fe nanoparticles. The diamond was grown in the Fe-Ni-C system by high pressure high temperature (HPHT) process. To produce the Fe nanoparticles we used the technique of reduction of ferric chloride by hydrogen. Our experiment demonstrated only a normal type of etching resulted in formation of a highly porous surface on the diamond crystal: such surface consists of numerous channels oriented normally to a surface plane. Different faces of a diamond sample were etched simultaneously. Micromorphology of the etched surface was characterized by atomic-force microscopy. It was shown that after etching the average roughness was 20.8 nm in comparison with the 1.64 nm for the as-grown diamond before treatment. We propose that the highly porous surface obtained by this technique can be used when producing diamond-metal composites or as a catalytic support for fixing of metal micro- and nanoparticles inside the etched channels.

Original languageEnglish
Pages (from-to)12-15
Number of pages4
JournalInternational Journal of Refractory Metals and Hard Materials
Volume76
DOIs
Publication statusPublished - 1 Nov 2018

Keywords

  • Atomic force microscopy
  • Etching channels
  • Fe nanoparticles
  • Surface micromorphology
  • Synthetic HPHT monocrystalline diamond

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