Individual Single-Wall Carbon Nanohorns Separated from Aggregates

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  • Minfang Zhang
    National Institute of Advanced Industrial Science and Technology, Higashi 1-1-1, Tsukuba 305-8565, Japan, and Nagoya University, Chiikusa-ku, Nagoya, 464-8601, Japan
  • Takashi Yamaguchi
    National Institute of Advanced Industrial Science and Technology, Higashi 1-1-1, Tsukuba 305-8565, Japan, and Nagoya University, Chiikusa-ku, Nagoya, 464-8601, Japan
  • Sumio Iijima
    National Institute of Advanced Industrial Science and Technology, Higashi 1-1-1, Tsukuba 305-8565, Japan, and Nagoya University, Chiikusa-ku, Nagoya, 464-8601, Japan
  • Masako Yudasaka
    National Institute of Advanced Industrial Science and Technology, Higashi 1-1-1, Tsukuba 305-8565, Japan, and Nagoya University, Chiikusa-ku, Nagoya, 464-8601, Japan

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The isolation of individual single-wall carbon nanohorns (SWNHs) from spherical dahlia-shaped aggregates of SWNHs has been successfully achieved for the first time by sucrose density gradient centrifugation. The shapes of the individual SWNHs took straight and two- and three-way branched forms. The lengths of the straight SWNHs or of each arm of the branched types were 10−70 nm, and their diameters were 2−10 nm. This new type of nanocarbon tubules will advance research of the applications of carbon nanostructures.

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