A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes

Hiroyuki Muramatsu, Kazunori Fujisawa, Yong Il Ko, Kap Seung Yang, Takuya Hayashi, Morinobu Endo, Cheol Min Yang, Y. C. Jung, Y. A. Kim

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Nanoscale defects in the outer tube to preserve the electrical and optical features of the inner tube can be engineered to exploit the intrinsic properties of double walled carbon nanotubes (DWCNTs) for various promising applications. We demonstrated a selective way to make defects in the outer tube by the fluorination of DWCNTs followed by the thermal detachment of the F atoms at 1000°C in argon. Fluorinated DWCNTs with different amounts of F atoms were prepared by reacting with fluorine gas at 25, 200, and 400°C that gave the stoichiometry of CF0.20, CF0.30, and CF0.43, respectively. At the three different temperatures used, we observed preservation of the coaxial morphology in the fluorinated DWCNTs. For the DWCNTs fluorinated at 25 and 200°C, the strong radial breathing modes (RBMs) of the inner tube and weakened RBMs of the outer tube indicated selective fluorine attachment onto the outer tube. However, the disappearance of the RBMs in the Raman spectrum of the DWCNTs fluorinated at 400°C showed the introduction of F atoms onto both inner and outer tubes. There was no significant change in the morphology and optical properties when the DWCNTs fluorinated at 25 and 200°C were thermally treated at 1000°C in argon. However, in the case of the DWCNTs fluorinated at 400°C, the recovery of strong RBMs from the inner tube and weakened RBMs from the outer tube indicated the selective introduction of substantial defects on the outer tube while preserving the original tubular shape. The thermal detachment of F atoms from fluorinated DWCNTs is an efficient way to make highly defective outer tubes for preserving the electrical conduction and optical activity of the inner tubes.

Original languageEnglish (US)
Pages (from-to)864-868
Number of pages5
JournalCuihua Xuebao/Chinese Journal of Catalysis
Volume35
Issue number6
StatePublished - Jun 2014

Fingerprint

Carbon Nanotubes
Carbon nanotubes
Heat treatment
Defects
Atoms
Fluorine
Argon
Fluorination
Stoichiometry
Raman scattering
Optical properties
Gases
Recovery

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Muramatsu, H., Fujisawa, K., Ko, Y. I., Yang, K. S., Hayashi, T., Endo, M., ... Kim, Y. A. (2014). A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes. Cuihua Xuebao/Chinese Journal of Catalysis, 35(6), 864-868.
Muramatsu, Hiroyuki ; Fujisawa, Kazunori ; Ko, Yong Il ; Yang, Kap Seung ; Hayashi, Takuya ; Endo, Morinobu ; Yang, Cheol Min ; Jung, Y. C. ; Kim, Y. A. / A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes. In: Cuihua Xuebao/Chinese Journal of Catalysis. 2014 ; Vol. 35, No. 6. pp. 864-868.
@article{4103077eb2804915b91adc7075c88dbd,
title = "A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes",
abstract = "Nanoscale defects in the outer tube to preserve the electrical and optical features of the inner tube can be engineered to exploit the intrinsic properties of double walled carbon nanotubes (DWCNTs) for various promising applications. We demonstrated a selective way to make defects in the outer tube by the fluorination of DWCNTs followed by the thermal detachment of the F atoms at 1000°C in argon. Fluorinated DWCNTs with different amounts of F atoms were prepared by reacting with fluorine gas at 25, 200, and 400°C that gave the stoichiometry of CF0.20, CF0.30, and CF0.43, respectively. At the three different temperatures used, we observed preservation of the coaxial morphology in the fluorinated DWCNTs. For the DWCNTs fluorinated at 25 and 200°C, the strong radial breathing modes (RBMs) of the inner tube and weakened RBMs of the outer tube indicated selective fluorine attachment onto the outer tube. However, the disappearance of the RBMs in the Raman spectrum of the DWCNTs fluorinated at 400°C showed the introduction of F atoms onto both inner and outer tubes. There was no significant change in the morphology and optical properties when the DWCNTs fluorinated at 25 and 200°C were thermally treated at 1000°C in argon. However, in the case of the DWCNTs fluorinated at 400°C, the recovery of strong RBMs from the inner tube and weakened RBMs from the outer tube indicated the selective introduction of substantial defects on the outer tube while preserving the original tubular shape. The thermal detachment of F atoms from fluorinated DWCNTs is an efficient way to make highly defective outer tubes for preserving the electrical conduction and optical activity of the inner tubes.",
author = "Hiroyuki Muramatsu and Kazunori Fujisawa and Ko, {Yong Il} and Yang, {Kap Seung} and Takuya Hayashi and Morinobu Endo and Yang, {Cheol Min} and Jung, {Y. C.} and Kim, {Y. A.}",
year = "2014",
month = "6",
language = "English (US)",
volume = "35",
pages = "864--868",
journal = "Chinese Journal of Catalysis",
issn = "0253-9837",
publisher = "Science Press",
number = "6",

}

Muramatsu, H, Fujisawa, K, Ko, YI, Yang, KS, Hayashi, T, Endo, M, Yang, CM, Jung, YC & Kim, YA 2014, 'A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes', Cuihua Xuebao/Chinese Journal of Catalysis, vol. 35, no. 6, pp. 864-868.

A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes. / Muramatsu, Hiroyuki; Fujisawa, Kazunori; Ko, Yong Il; Yang, Kap Seung; Hayashi, Takuya; Endo, Morinobu; Yang, Cheol Min; Jung, Y. C.; Kim, Y. A.

In: Cuihua Xuebao/Chinese Journal of Catalysis, Vol. 35, No. 6, 06.2014, p. 864-868.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A selective way to create defects by the thermal treatment of fluorinated double walled carbon nanotubes

AU - Muramatsu, Hiroyuki

AU - Fujisawa, Kazunori

AU - Ko, Yong Il

AU - Yang, Kap Seung

AU - Hayashi, Takuya

AU - Endo, Morinobu

AU - Yang, Cheol Min

AU - Jung, Y. C.

AU - Kim, Y. A.

PY - 2014/6

Y1 - 2014/6

N2 - Nanoscale defects in the outer tube to preserve the electrical and optical features of the inner tube can be engineered to exploit the intrinsic properties of double walled carbon nanotubes (DWCNTs) for various promising applications. We demonstrated a selective way to make defects in the outer tube by the fluorination of DWCNTs followed by the thermal detachment of the F atoms at 1000°C in argon. Fluorinated DWCNTs with different amounts of F atoms were prepared by reacting with fluorine gas at 25, 200, and 400°C that gave the stoichiometry of CF0.20, CF0.30, and CF0.43, respectively. At the three different temperatures used, we observed preservation of the coaxial morphology in the fluorinated DWCNTs. For the DWCNTs fluorinated at 25 and 200°C, the strong radial breathing modes (RBMs) of the inner tube and weakened RBMs of the outer tube indicated selective fluorine attachment onto the outer tube. However, the disappearance of the RBMs in the Raman spectrum of the DWCNTs fluorinated at 400°C showed the introduction of F atoms onto both inner and outer tubes. There was no significant change in the morphology and optical properties when the DWCNTs fluorinated at 25 and 200°C were thermally treated at 1000°C in argon. However, in the case of the DWCNTs fluorinated at 400°C, the recovery of strong RBMs from the inner tube and weakened RBMs from the outer tube indicated the selective introduction of substantial defects on the outer tube while preserving the original tubular shape. The thermal detachment of F atoms from fluorinated DWCNTs is an efficient way to make highly defective outer tubes for preserving the electrical conduction and optical activity of the inner tubes.

AB - Nanoscale defects in the outer tube to preserve the electrical and optical features of the inner tube can be engineered to exploit the intrinsic properties of double walled carbon nanotubes (DWCNTs) for various promising applications. We demonstrated a selective way to make defects in the outer tube by the fluorination of DWCNTs followed by the thermal detachment of the F atoms at 1000°C in argon. Fluorinated DWCNTs with different amounts of F atoms were prepared by reacting with fluorine gas at 25, 200, and 400°C that gave the stoichiometry of CF0.20, CF0.30, and CF0.43, respectively. At the three different temperatures used, we observed preservation of the coaxial morphology in the fluorinated DWCNTs. For the DWCNTs fluorinated at 25 and 200°C, the strong radial breathing modes (RBMs) of the inner tube and weakened RBMs of the outer tube indicated selective fluorine attachment onto the outer tube. However, the disappearance of the RBMs in the Raman spectrum of the DWCNTs fluorinated at 400°C showed the introduction of F atoms onto both inner and outer tubes. There was no significant change in the morphology and optical properties when the DWCNTs fluorinated at 25 and 200°C were thermally treated at 1000°C in argon. However, in the case of the DWCNTs fluorinated at 400°C, the recovery of strong RBMs from the inner tube and weakened RBMs from the outer tube indicated the selective introduction of substantial defects on the outer tube while preserving the original tubular shape. The thermal detachment of F atoms from fluorinated DWCNTs is an efficient way to make highly defective outer tubes for preserving the electrical conduction and optical activity of the inner tubes.

UR - http://www.scopus.com/inward/record.url?scp=84902496287&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902496287&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:84902496287

VL - 35

SP - 864

EP - 868

JO - Chinese Journal of Catalysis

JF - Chinese Journal of Catalysis

SN - 0253-9837

IS - 6

ER -