Thermal expansion of single-walled carbon nanotube (SWNT) bundles: X-ray diffraction studies

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

Research output: Contribution to journalArticlepeer-review

175 Citations (Scopus)


Thermal expansion coefficient in single-walled carbon nanotube bundles was determined as (-0.15±0.20) × 10-5 (1/K) for the tube diameter and (0.75±0.25) × 10-5 (1/K) for the triangular lattice constant by means of x-ray scattering between 300 K to 950 K. The value for the intertube gap was (4.2±1.4) × 10-5 (1/K), which is larger than 2.6×10-5 (1/K) for the c-axis thermal expansion in graphite. The results reveal the presence of a remarkably larger lattice anharmonicity in nanotube bundles than that of graphite. The small value for the tube diameter is consistent with the seamless tube structure formed by a strong covalent bond between carbon atoms comparable to that in graphite.

Original languageEnglish
Article number241402
Pages (from-to)2414021-2414023
Number of pages3
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number24
Publication statusPublished - 2001 Dec 15
Externally publishedYes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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