C70 molecular stumbling inside single-walled carbon nanotubes

Yutaka Maniwa, Hiromichi Kataura, Masatoshi Abe, Akihiko Fujiwara, Ryuji Fujiwara, Hiroshi Kira, Hideki Tou, Shinzo Suzuki, Yohji Achiba, Eiji Nishibori, Masaki Takata, Makoto Sakata, Hiroyoshi Suematsu

Research output: Contribution to journalArticlepeer-review

32 Citations (Scopus)


We report the structural study of C70-one-dimensional (1D) crystal formed inside single-walled carbon nanotubes (SWNTs). X-ray diffraction measurements were performed between 100 K and 999 K on C70- encapsulated SWNTs with an average diameter of 1.37 nm. Two different domains, where the dominant alignment of C70 molecular long axis is standing or lying with respect to the tube axis, were observed; the ratio of the standing to the lying C70-domains is roughly 7 : 3. Thermal expansion of interfullerene distance gave no evidence for orientational phase transitions, not as in the 3D crystals. Instead, the longrange order of the standing C 7o-alignment was thermally destroyed with an activation energy of 39 ± 4 meV. The results imply the importance of either the ID fluctuation or the tube-C70 interaction at finite temperatures.

Original languageEnglish
Pages (from-to)45-48
Number of pages4
Journaljournal of the physical society of japan
Issue number1
Publication statusPublished - 2003 Jan 1
Externally publishedYes


  • C
  • Carbon nanotube
  • Fullerene
  • Peapod
  • Phase transition
  • SWNT
  • Structure
  • Thermal expansion
  • XRD

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'C70 molecular stumbling inside single-walled carbon nanotubes'. Together they form a unique fingerprint.

Cite this