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

研究成果: Article

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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.

元の言語English
記事番号123301
ジャーナルJournal of Applied Physics
117
発行部数12
DOI
出版物ステータスPublished - 2015 3 28

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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