Synthesis of Fe-filled carbon nanocapsules by an electric plasma discharge in an ultrasonic cavitation field of liquid ethanol

Ruslan Sergiienko, Etsuro Shibata, Zentaro Akase, Hiroyuki Suwa, Daisuke Shindo, Takashi Nakamura

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

Nanoparticles of iron carbides (Fe3C and X-Fe2.5C) wrapped in multilayered graphitic sheets were synthesized by a developed method in which an electric plasma was generated in an ultrasonic cavitation field containing thousands of tiny activated bubbles in liquid ethanol. Annealing changed the phase composition, structure, and size of the carbon nanocapsules as most of the iron carbides decomposed into the α-Fe phase and graphite. Powder samples annealed at 873 and 973 K have maximal saturation magnetization values equal to 80.6 and 83.4 A m2/kg, respectively, which is approximately 40% of the value of bulk iron. Using this method, it will be possible to synthesize nanoparticles of a metal of choice encapsulated by graphite shells by selecting appropriate materials for the ultrasonic tip and electrodes.

Original languageEnglish
Pages (from-to)2524-2533
Number of pages10
JournalJournal of Materials Research
Volume21
Issue number10
DOIs
Publication statusPublished - 2006 Oct 1

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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