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

doi:10.1143/JPSJ.72.45

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 journal › Article › peer-review

32 Citations (Scopus)

Abstract

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 language	English
Pages (from-to)	45-48
Number of pages	4
Journal	journal of the physical society of japan
Volume	72
Issue number	1
DOIs	https://doi.org/10.1143/JPSJ.72.45
Publication status	Published - 2003 Jan 1
Externally published	Yes

Keywords

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

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.72.45

Cite this

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title = "C70 molecular stumbling inside single-walled carbon nanotubes",

abstract = "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.",

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

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T1 - C70 molecular stumbling inside single-walled carbon nanotubes

AU - Maniwa, Yutaka

AU - Kataura, Hiromichi

AU - Abe, Masatoshi

AU - Fujiwara, Akihiko

AU - Fujiwara, Ryuji

AU - Kira, Hiroshi

AU - Tou, Hideki

AU - Suzuki, Shinzo

AU - Achiba, Yohji

AU - Nishibori, Eiji

AU - Takata, Masaki

AU - Sakata, Makoto

AU - Suematsu, Hiroyoshi

PY - 2003/1/1

Y1 - 2003/1/1

N2 - 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.

AB - 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.

KW - C

KW - Carbon nanotube

KW - Fullerene

KW - Peapod

KW - Phase transition

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KW - Structure

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