Pulsed KrF-laser synthesis of single-wall-carbon-nanotubes

Effects of catalyst content and furnace temperature on their nanostructure and photoluminescence properties

V. Le Borgne, Brahim Aissa, M. Mohamedi, Yoong Ahm Kim, Morinobu Endo, M. A. El Khakani

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

In this article, we report on the use of a pulsed KrF-laser (248 nm, 20 ns) for the synthesis of single wall carbon nanotubes (SWCNTs) from the ablation of a graphite target loaded with Co/Ni catalyst, under various growth conditions. By varying the Co/Ni catalyst load of the graphite target, from 0 to 2.4 at.%, the laser synthesized SWCNTs, under a furnace temperature (T f) of 1,100 °C, were found to be decorated by C 60 buckyballs, of which the density decreases as the catalyst content is increased. The effect of the catalyst content of the laser-ablated graphite target on the produced carbon nanostructures (C 60 vs. SWCNTs) was systematically investigated by means of various characterization techniques, including Raman spectroscopy, thermogravimetry, and SEM/HR-TEM microscopies. A [Co/Ni] C 1.2 at.% was identified as the optimal concentration for the production of SWCNTs without any detectable presence of C 60 buckyballs. Thus, under the optimal growth conditions (i.e., [Co/Ni] ≥ 1.2 at.% and T f = 1,100 °C), the produced SWCNTs were found to be characterized by a very narrow diameter distribution (centered on 1.2 nm) with lengths in excess of 10 μm. By increasing T f from 900 to 1,150 °C, the diameter of the SWCNTs can be varied from ∼ 0.9 to ∼ 1.3 nm. This nanotube diameter variation was evidenced by Raman and UV-Vis absorption measurements, and its effect on the photoluminescence of the SWCNTs is presented and discussed.

Original languageEnglish
Pages (from-to)5759-5767
Number of pages9
JournalJournal of Nanoparticle Research
Volume13
Issue number11
DOIs
Publication statusPublished - Nov 2011
Externally publishedYes

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Carbon Nanotubes
Pulsed Laser
Furnace
Photoluminescence
Nanostructures
Catalyst
Pulsed lasers
Nanotubes
furnaces
Carbon nanotubes
pulsed lasers
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carbon nanotubes
Synthesis
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Keywords

  • KrF laser
  • Laser synthesis
  • Luminescence
  • Single wall carbon nanotube

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Modelling and Simulation
  • Chemistry(all)
  • Materials Science(all)
  • Bioengineering

Cite this

Pulsed KrF-laser synthesis of single-wall-carbon-nanotubes : Effects of catalyst content and furnace temperature on their nanostructure and photoluminescence properties. / Le Borgne, V.; Aissa, Brahim; Mohamedi, M.; Kim, Yoong Ahm; Endo, Morinobu; El Khakani, M. A.

In: Journal of Nanoparticle Research, Vol. 13, No. 11, 11.2011, p. 5759-5767.

Research output: Contribution to journalArticle

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abstract = "In this article, we report on the use of a pulsed KrF-laser (248 nm, 20 ns) for the synthesis of single wall carbon nanotubes (SWCNTs) from the ablation of a graphite target loaded with Co/Ni catalyst, under various growth conditions. By varying the Co/Ni catalyst load of the graphite target, from 0 to 2.4 at.{\%}, the laser synthesized SWCNTs, under a furnace temperature (T f) of 1,100 °C, were found to be decorated by C 60 buckyballs, of which the density decreases as the catalyst content is increased. The effect of the catalyst content of the laser-ablated graphite target on the produced carbon nanostructures (C 60 vs. SWCNTs) was systematically investigated by means of various characterization techniques, including Raman spectroscopy, thermogravimetry, and SEM/HR-TEM microscopies. A [Co/Ni] C 1.2 at.{\%} was identified as the optimal concentration for the production of SWCNTs without any detectable presence of C 60 buckyballs. Thus, under the optimal growth conditions (i.e., [Co/Ni] ≥ 1.2 at.{\%} and T f = 1,100 °C), the produced SWCNTs were found to be characterized by a very narrow diameter distribution (centered on 1.2 nm) with lengths in excess of 10 μm. By increasing T f from 900 to 1,150 °C, the diameter of the SWCNTs can be varied from ∼ 0.9 to ∼ 1.3 nm. This nanotube diameter variation was evidenced by Raman and UV-Vis absorption measurements, and its effect on the photoluminescence of the SWCNTs is presented and discussed.",
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