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

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

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Thermal expansion coefficient in single-walled carbon nanotube bundles was determined as (formula presented) for the tube diameter and (formula presented) for the triangular lattice constant by means of x-ray scattering between 300 K to 950 K. The value for the intertube gap was (formula presented) which is larger than (formula presented) 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
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number24
Publication statusPublished - 2001


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