Super-robust, lightweight, conducting carbon nanotube blocks cross-linked by de-fluorination

Yoshinori Sato; Makoto Ootsubo; Go Yamamoto; Gregory Van Lier; Mauricio Terrones; Shinji Hashiguchi; Hisamichi Kimura; Akira Okubo; Kenichi Motomiya; Balachandran Jeyadevan; Toshiyuki Hashida; Kazuyuki Tohji

doi:10.1021/nn700324z

Super-robust, lightweight, conducting carbon nanotube blocks cross-linked by de-fluorination

Yoshinori Sato, Makoto Ootsubo, Go Yamamoto, Gregory Van Lier, Mauricio Terrones, Shinji Hashiguchi, Hisamichi Kimura, Akira Okubo, Kenichi Motomiya, Balachandran Jeyadevan, Toshiyuki Hashida, Kazuyuki Tohji

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

We produced large binder-free multi-walled carbon nanotube (MWNT) blocks from fluorinated MWNTs using thermal heating and a compressing method in vacuo. This technique resulted in the formation of covalent MWNT networks generated by the introduction of sp³-hybridized carbon atoms that cross-link between nanotubes upon de-fluorination. The resulting carbon nanotube blocks are lighter than graphite, can be machined and polished, and possess average bending strengths of 102.2 MPa, a bending modulus of 15.4 GPa, and an electrical conductivity of 2.1 × 10² S/cm. Although each nanotube exhibits a random structure in these blocks, the mechanical properties are 3 times higher than those obtained for commercial graphite. On the basis of theoretical molecular dynamics simulations, a model is presented for the nanotube interconnecting mechanism upon de-fluorination.

Original language	English
Pages (from-to)	348-356
Number of pages	9
Journal	ACS Nano
Volume	2
Issue number	2
DOIs	https://doi.org/10.1021/nn700324z
Publication status	Published - 2008 Feb 1

Keywords

Binder-free
Blocks
Carbon nanotubes
Fluorine
Solidification
Strength conducting

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)
Physics and Astronomy(all)

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10.1021/nn700324z

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title = "Super-robust, lightweight, conducting carbon nanotube blocks cross-linked by de-fluorination",

abstract = "We produced large binder-free multi-walled carbon nanotube (MWNT) blocks from fluorinated MWNTs using thermal heating and a compressing method in vacuo. This technique resulted in the formation of covalent MWNT networks generated by the introduction of sp3-hybridized carbon atoms that cross-link between nanotubes upon de-fluorination. The resulting carbon nanotube blocks are lighter than graphite, can be machined and polished, and possess average bending strengths of 102.2 MPa, a bending modulus of 15.4 GPa, and an electrical conductivity of 2.1 × 102 S/cm. Although each nanotube exhibits a random structure in these blocks, the mechanical properties are 3 times higher than those obtained for commercial graphite. On the basis of theoretical molecular dynamics simulations, a model is presented for the nanotube interconnecting mechanism upon de-fluorination.",

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author = "Yoshinori Sato and Makoto Ootsubo and Go Yamamoto and {Van Lier}, Gregory and Mauricio Terrones and Shinji Hashiguchi and Hisamichi Kimura and Akira Okubo and Kenichi Motomiya and Balachandran Jeyadevan and Toshiyuki Hashida and Kazuyuki Tohji",

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AU - Sato, Yoshinori

AU - Ootsubo, Makoto

AU - Yamamoto, Go

AU - Van Lier, Gregory

AU - Terrones, Mauricio

AU - Hashiguchi, Shinji

AU - Kimura, Hisamichi

AU - Okubo, Akira

AU - Motomiya, Kenichi

AU - Jeyadevan, Balachandran

AU - Hashida, Toshiyuki

AU - Tohji, Kazuyuki

PY - 2008/2/1

Y1 - 2008/2/1

N2 - We produced large binder-free multi-walled carbon nanotube (MWNT) blocks from fluorinated MWNTs using thermal heating and a compressing method in vacuo. This technique resulted in the formation of covalent MWNT networks generated by the introduction of sp3-hybridized carbon atoms that cross-link between nanotubes upon de-fluorination. The resulting carbon nanotube blocks are lighter than graphite, can be machined and polished, and possess average bending strengths of 102.2 MPa, a bending modulus of 15.4 GPa, and an electrical conductivity of 2.1 × 102 S/cm. Although each nanotube exhibits a random structure in these blocks, the mechanical properties are 3 times higher than those obtained for commercial graphite. On the basis of theoretical molecular dynamics simulations, a model is presented for the nanotube interconnecting mechanism upon de-fluorination.

AB - We produced large binder-free multi-walled carbon nanotube (MWNT) blocks from fluorinated MWNTs using thermal heating and a compressing method in vacuo. This technique resulted in the formation of covalent MWNT networks generated by the introduction of sp3-hybridized carbon atoms that cross-link between nanotubes upon de-fluorination. The resulting carbon nanotube blocks are lighter than graphite, can be machined and polished, and possess average bending strengths of 102.2 MPa, a bending modulus of 15.4 GPa, and an electrical conductivity of 2.1 × 102 S/cm. Although each nanotube exhibits a random structure in these blocks, the mechanical properties are 3 times higher than those obtained for commercial graphite. On the basis of theoretical molecular dynamics simulations, a model is presented for the nanotube interconnecting mechanism upon de-fluorination.

KW - Binder-free

KW - Blocks

KW - Carbon nanotubes

KW - Fluorine

KW - Solidification

KW - Strength conducting

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Super-robust, lightweight, conducting carbon nanotube blocks cross-linked by de-fluorination

Abstract

Keywords

ASJC Scopus subject areas

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