Selective preparation of polyhedral graphite particles and multi-wall carbon nanotubes by a transferred arc under atmospheric pressure

Feng Liang, Tasuku Shimizu, Manabu Tanaka, Sooseok Choi, Takayuki Watanabe

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

High-purity polyhedral graphite particles (PGPs) and multi-wall carbon nanotubes (MWNTs) were selectively synthesized by a transferred arc discharge method under atmospheric pressure. PGPs and MWNTs were characterized by the field emission scanning electron microscope (FE-SEM), transition electron microscopy (TEM), and Raman spectroscopy. The products were successfully controlled by varying the arc current and the anode diameter. PGPs were the main products in the case of a relatively high arc current of 100 A or a large anode diameter of 30 mm, while MWNTs were the main products when the arc current was reduced to 80 A or the anode diameter was decreased to 15 and 10 mm. The ratio of carbon ions to carbon radicals near the cathode tip was employed to explain the mechanisms of PGP and MWNT formation. Relatively high ratio of carbon ions to carbon radicals contributed to the formation of PGPs. In contrast, relatively low ratio of carbon ions to carbon radicals led to the formation of MWNTs.

Original languageEnglish
Pages (from-to)70-76
Number of pages7
JournalDiamond and Related Materials
Volume30
DOIs
Publication statusPublished - Nov 1 2012
Externally publishedYes

Fingerprint

Carbon Nanotubes
Graphite
Atmospheric pressure
Carbon nanotubes
Carbon
Anodes
Ions
Field emission
Electron microscopy
Raman spectroscopy
Cathodes
Electron microscopes
Scanning

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Chemistry(all)
  • Mechanical Engineering
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Selective preparation of polyhedral graphite particles and multi-wall carbon nanotubes by a transferred arc under atmospheric pressure. / Liang, Feng; Shimizu, Tasuku; Tanaka, Manabu; Choi, Sooseok; Watanabe, Takayuki.

In: Diamond and Related Materials, Vol. 30, 01.11.2012, p. 70-76.

Research output: Contribution to journalArticle

@article{b96921ac18b644dabb4ed7aa7ce12e1d,
title = "Selective preparation of polyhedral graphite particles and multi-wall carbon nanotubes by a transferred arc under atmospheric pressure",
abstract = "High-purity polyhedral graphite particles (PGPs) and multi-wall carbon nanotubes (MWNTs) were selectively synthesized by a transferred arc discharge method under atmospheric pressure. PGPs and MWNTs were characterized by the field emission scanning electron microscope (FE-SEM), transition electron microscopy (TEM), and Raman spectroscopy. The products were successfully controlled by varying the arc current and the anode diameter. PGPs were the main products in the case of a relatively high arc current of 100 A or a large anode diameter of 30 mm, while MWNTs were the main products when the arc current was reduced to 80 A or the anode diameter was decreased to 15 and 10 mm. The ratio of carbon ions to carbon radicals near the cathode tip was employed to explain the mechanisms of PGP and MWNT formation. Relatively high ratio of carbon ions to carbon radicals contributed to the formation of PGPs. In contrast, relatively low ratio of carbon ions to carbon radicals led to the formation of MWNTs.",
author = "Feng Liang and Tasuku Shimizu and Manabu Tanaka and Sooseok Choi and Takayuki Watanabe",
year = "2012",
month = "11",
day = "1",
doi = "10.1016/j.diamond.2012.09.004",
language = "English",
volume = "30",
pages = "70--76",
journal = "Diamond and Related Materials",
issn = "0925-9635",
publisher = "Elsevier BV",

}

TY - JOUR

T1 - Selective preparation of polyhedral graphite particles and multi-wall carbon nanotubes by a transferred arc under atmospheric pressure

AU - Liang, Feng

AU - Shimizu, Tasuku

AU - Tanaka, Manabu

AU - Choi, Sooseok

AU - Watanabe, Takayuki

PY - 2012/11/1

Y1 - 2012/11/1

N2 - High-purity polyhedral graphite particles (PGPs) and multi-wall carbon nanotubes (MWNTs) were selectively synthesized by a transferred arc discharge method under atmospheric pressure. PGPs and MWNTs were characterized by the field emission scanning electron microscope (FE-SEM), transition electron microscopy (TEM), and Raman spectroscopy. The products were successfully controlled by varying the arc current and the anode diameter. PGPs were the main products in the case of a relatively high arc current of 100 A or a large anode diameter of 30 mm, while MWNTs were the main products when the arc current was reduced to 80 A or the anode diameter was decreased to 15 and 10 mm. The ratio of carbon ions to carbon radicals near the cathode tip was employed to explain the mechanisms of PGP and MWNT formation. Relatively high ratio of carbon ions to carbon radicals contributed to the formation of PGPs. In contrast, relatively low ratio of carbon ions to carbon radicals led to the formation of MWNTs.

AB - High-purity polyhedral graphite particles (PGPs) and multi-wall carbon nanotubes (MWNTs) were selectively synthesized by a transferred arc discharge method under atmospheric pressure. PGPs and MWNTs were characterized by the field emission scanning electron microscope (FE-SEM), transition electron microscopy (TEM), and Raman spectroscopy. The products were successfully controlled by varying the arc current and the anode diameter. PGPs were the main products in the case of a relatively high arc current of 100 A or a large anode diameter of 30 mm, while MWNTs were the main products when the arc current was reduced to 80 A or the anode diameter was decreased to 15 and 10 mm. The ratio of carbon ions to carbon radicals near the cathode tip was employed to explain the mechanisms of PGP and MWNT formation. Relatively high ratio of carbon ions to carbon radicals contributed to the formation of PGPs. In contrast, relatively low ratio of carbon ions to carbon radicals led to the formation of MWNTs.

UR - http://www.scopus.com/inward/record.url?scp=84868646637&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84868646637&partnerID=8YFLogxK

U2 - 10.1016/j.diamond.2012.09.004

DO - 10.1016/j.diamond.2012.09.004

M3 - Article

VL - 30

SP - 70

EP - 76

JO - Diamond and Related Materials

JF - Diamond and Related Materials

SN - 0925-9635

ER -