Multiwalled carbon nanotubes grown in hydrogen atmosphere: An x-ray diffraction study

Yutaka Maniwa, Ryuji Fujiwara, Hiroshi Kira, Hideki Tou, Eiji Nishibori, Masaki Takata, Makoto Sakata, Akihiko Fujiwara, Xinluo Zhao, Sumio Iijima, Sumio Iijima, Yoshinori Ando

Research output: Contribution to journalArticlepeer-review

124 Citations (Scopus)


X-ray diffraction study of multiwalled carbon nanotube (MWNT) grown by arc discharge in hydrogen atmosphere is presented. It is found that the thermal-expansion coefficient along the radial direction of MWNT is widely distributed in a range from 1.6× 10-5 K-1 to 2.6×10-5 K-1, indicating the existence of both of Russian doll MWNT and highly defective MWNT Russian doll MWNT is suggested to have the outer diameter less than ∼ 100 Å. Thicker MWNT's are typically highly defective, and may have the jelly roll (scroll) or defective polygonal structure consisting of flat graphite domains.

Original languageEnglish
Article number073105
Pages (from-to)731051-731054
Number of pages4
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number7
Publication statusPublished - 2001 Aug 15


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