Development of low-current plasma process with ultrasonic cavitations for synthesizing metal-filled carbon nanocapsules in organic solutions

Ruslan Sergiienko, Etsuro Shibata, Sung Hoon Kim, Takashi Nakamura

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Nanoparticles of metal carbides (Fe3C, χ-Fe2.5C, Co3C, TiC) wrapped in mutilayered graphitic sheets, called as carbon nanocapsules (CNCs), were synthesized by a new method in which low-current plasma discharge was generated even in insulating organic solutions such as benzene and ethanol due to an ultrasonic irradiation. In this process, ultrasonic horn was utilized not only for ultrasonic irradiation but also for cathode electrode. Anode electrode materials such as iron, cobalt and titanium were optionally selected. In this study, ultrasonic cavitation bubbles were induced between the gap of cathode and anode electrodes in the organic solutions. Consequently, an electric plasma discharge could be generated in liquid organics at power as low as around 45-165 W (DC 30-55 V, 1.5-5 A). The structure, morphology and phases of CNCs were characterized by high-resolution transmission electron microscopy and X-ray diffraction. The magnetic properties (saturation magnetization, coercivity) of the CNCs samples were measured by a vibrating sample magnetometer at room temperature.

Original languageEnglish
Title of host publicationThe Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
Pages758-763
Number of pages6
Publication statusPublished - 2009
Event3rd International Conference on Processing Materials for Properties 2008, PMP III - Bangkok, Thailand
Duration: 2008 Dec 72008 Dec 10

Publication series

NameThe Minerals, Metals and Materials Society - 3rd International Conference on Processing Materials for Properties 2008, PMP III
Volume2

Other

Other3rd International Conference on Processing Materials for Properties 2008, PMP III
CountryThailand
CityBangkok
Period08/12/708/12/10

Keywords

  • Carbon nanocapsules
  • Electron microscope
  • Plasma discharge
  • Ultrasonic cavitation

ASJC Scopus subject areas

  • Materials Science(all)

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