Beam-induced graphitic carbon cage transformation from sumanene aggregates

Journal Article · Mon Jan 27 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4863739· OSTI ID:22280714

Fujita, Jun-ichi; Tachi, Masashi; Murakami, Katsuhisa ^[1]; Sakurai, Hidehiro; Morita, Yuki; Higashibayashi, Shuhei ^[2]; Takeguchi, Masaki ^[3]

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1. Institute of Applied Physics, University of Tsukuba, Tsukuba 305-8573 (Japan)
2. Research Center of Integrative Molecular Systems, Institute for Molecular Science, Myodaiji, Okazaki 444-8787 (Japan)
3. Transmission Electron Microscopy Station, National Institute for Materials Science, Tsukuba 305-0047 (Japan)

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/cm{sup 2} 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.

• OSTI ID: 22280714
• Journal Information: Applied Physics Letters, Vol. 104, Issue 4; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
ATOMS
ELECTRON BEAMS
ELECTRONS
EXCITATION
GRAPHITE
IRRADIATION
MOLECULES
NANOSTRUCTURES
PHASE TRANSFORMATIONS
PHYSICAL RADIATION EFFECTS
RADIATION DOSES
TRANSIENTS