Beam-induced graphitic carbon cage transformation from sumanene aggregates

Jun Ichi Fujita, Masashi Tachi, Katsuhisa Murakami, Hidehiro Sakurai, Yuki Morita, Shuhei Higashibayashi, Masaki Takeguchi

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


We found that electron-beam irradiation of sumanene aggregates strongly enhanced their transformation into a graphitic carbon cage, having a diameter of about 20 nm. The threshold electron dose was about 32 mC/cm2 at 200 keV, but the transformation is still induced at 20 keV. The transformation sequence suggested that the cage was constructed accompanied by the dynamical movement of the transiently linked sumanene molecules in order to pile up inside the shell. Thus, bond excitation in the sumanene molecules rather than a knock-on of carbon atoms seems to be the main cause of the cage transformation.

Original languageEnglish
Article number043107
JournalApplied Physics Letters
Issue number4
Publication statusPublished - 2014 Jan 29
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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