Nitrogen-atom endohedral fullerene synthesis with high efficiency by controlling plasma-ion irradiation energy and C60 internal energy

Soon Cheon Cho, Toshiro Kaneko, Hiroyasu Ishida, Rikizo Hatakeyama

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

The nitrogen-atom endohedral fullerene (N@C60) has been synthesized by controlling the plasma ion irradiation energy (Ei) and fullerene (C60) behavior in the sublimation phase. We examined the relationship between the synthesis purity of N@C60 [molar concentration ratio of N@C60 to pristine fullerene (C60)] and Ei, which was controlled by changing the substrate bias voltages (Vsub) and gas pressure (PN2) during the plasma irradiation process. High-density nitrogen-molecular ions (N2+) with a suitable Ei near 80 eV are confirmed to be the optimum condition of the nitrogen plasma for the synthesis of high-purity N@C60. In addition, high sublimation of C60 contributes to a higher yield due to the high internal energy of C60 and the related cage defects that are present under these conditions. As a result, a purity of 0.83% is realized for the first time, which is almost two orders of magnitude higher than that using other methods.

Original languageEnglish
Article number123301
JournalJournal of Applied Physics
Volume117
Issue number12
DOIs
Publication statusPublished - 2015 Mar 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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