Experimental studies of the formation process and morphologies of carbon nanotubes with bamboo mode structures

Y. Y. Wang, G. Y. Tang, F. A M Koeck, Billyde Brown, J. M. Garguilo, Robert Nemanich

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

Carbon nanotubes (CNT) were synthesized by microwave plasma chemical vapor deposition, and the formation process and morphologies of bamboo mode structures were systematically analyzed. Thin films of Fe on Si substrates were used as the catalyst, and the CNT films were characterized with electron microscopy, Raman spectroscopy, and Auger electron spectroscopy. For growth up to 15 min, the films grow with vertically aligned CNT with evidence of amorphous carbon at the top surface. For longer growth times the films exhibit a layer of amorphous carbon and a CNT mat on top of the aligned carbon nanotube 'forest.' Transmission electron microscopy measurements displayed multiwalled CNT with bamboo structure and encapsulated tips some of which contained catalyst particles. Two kinds of bamboo mode structures were observed: cone shaped, and cylindrical. The results indicate that the CNT growth is predominantly of the base growth mode, and the formation of the compartments was attributed to the difference in the bulk and surface diffusion of carbon species at the catalyst.

Original languageEnglish (US)
Pages (from-to)1287-1291
Number of pages5
JournalDiamond and Related Materials
Volume13
Issue number4-8
DOIs
StatePublished - Apr 2004
Externally publishedYes

Fingerprint

Carbon Nanotubes
Bamboo
Carbon nanotubes
carbon nanotubes
Amorphous carbon
Catalysts
catalysts
carbon
Surface diffusion
Multiwalled carbon nanotubes (MWCN)
Auger electron spectroscopy
Electron microscopy
compartments
surface diffusion
Raman spectroscopy
Cones
Chemical vapor deposition
Carbon
Auger spectroscopy
electron spectroscopy

Keywords

  • Bamboo mode
  • Formation process
  • Morphologies
  • Multiwalled carbon nanotubes

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Experimental studies of the formation process and morphologies of carbon nanotubes with bamboo mode structures. / Wang, Y. Y.; Tang, G. Y.; Koeck, F. A M; Brown, Billyde; Garguilo, J. M.; Nemanich, Robert.

In: Diamond and Related Materials, Vol. 13, No. 4-8, 04.2004, p. 1287-1291.

Research output: Contribution to journalArticle

Wang, Y. Y. ; Tang, G. Y. ; Koeck, F. A M ; Brown, Billyde ; Garguilo, J. M. ; Nemanich, Robert. / Experimental studies of the formation process and morphologies of carbon nanotubes with bamboo mode structures. In: Diamond and Related Materials. 2004 ; Vol. 13, No. 4-8. pp. 1287-1291.
@article{514197792bb24f968a7cab3b607c8bcc,
title = "Experimental studies of the formation process and morphologies of carbon nanotubes with bamboo mode structures",
abstract = "Carbon nanotubes (CNT) were synthesized by microwave plasma chemical vapor deposition, and the formation process and morphologies of bamboo mode structures were systematically analyzed. Thin films of Fe on Si substrates were used as the catalyst, and the CNT films were characterized with electron microscopy, Raman spectroscopy, and Auger electron spectroscopy. For growth up to 15 min, the films grow with vertically aligned CNT with evidence of amorphous carbon at the top surface. For longer growth times the films exhibit a layer of amorphous carbon and a CNT mat on top of the aligned carbon nanotube 'forest.' Transmission electron microscopy measurements displayed multiwalled CNT with bamboo structure and encapsulated tips some of which contained catalyst particles. Two kinds of bamboo mode structures were observed: cone shaped, and cylindrical. The results indicate that the CNT growth is predominantly of the base growth mode, and the formation of the compartments was attributed to the difference in the bulk and surface diffusion of carbon species at the catalyst.",
keywords = "Bamboo mode, Formation process, Morphologies, Multiwalled carbon nanotubes",
author = "Wang, {Y. Y.} and Tang, {G. Y.} and Koeck, {F. A M} and Billyde Brown and Garguilo, {J. M.} and Robert Nemanich",
year = "2004",
month = "4",
doi = "10.1016/j.diamond.2004.01.009",
language = "English (US)",
volume = "13",
pages = "1287--1291",
journal = "Diamond and Related Materials",
issn = "0925-9635",
publisher = "Elsevier BV",
number = "4-8",

}

TY - JOUR

T1 - Experimental studies of the formation process and morphologies of carbon nanotubes with bamboo mode structures

AU - Wang, Y. Y.

AU - Tang, G. Y.

AU - Koeck, F. A M

AU - Brown, Billyde

AU - Garguilo, J. M.

AU - Nemanich, Robert

PY - 2004/4

Y1 - 2004/4

N2 - Carbon nanotubes (CNT) were synthesized by microwave plasma chemical vapor deposition, and the formation process and morphologies of bamboo mode structures were systematically analyzed. Thin films of Fe on Si substrates were used as the catalyst, and the CNT films were characterized with electron microscopy, Raman spectroscopy, and Auger electron spectroscopy. For growth up to 15 min, the films grow with vertically aligned CNT with evidence of amorphous carbon at the top surface. For longer growth times the films exhibit a layer of amorphous carbon and a CNT mat on top of the aligned carbon nanotube 'forest.' Transmission electron microscopy measurements displayed multiwalled CNT with bamboo structure and encapsulated tips some of which contained catalyst particles. Two kinds of bamboo mode structures were observed: cone shaped, and cylindrical. The results indicate that the CNT growth is predominantly of the base growth mode, and the formation of the compartments was attributed to the difference in the bulk and surface diffusion of carbon species at the catalyst.

AB - Carbon nanotubes (CNT) were synthesized by microwave plasma chemical vapor deposition, and the formation process and morphologies of bamboo mode structures were systematically analyzed. Thin films of Fe on Si substrates were used as the catalyst, and the CNT films were characterized with electron microscopy, Raman spectroscopy, and Auger electron spectroscopy. For growth up to 15 min, the films grow with vertically aligned CNT with evidence of amorphous carbon at the top surface. For longer growth times the films exhibit a layer of amorphous carbon and a CNT mat on top of the aligned carbon nanotube 'forest.' Transmission electron microscopy measurements displayed multiwalled CNT with bamboo structure and encapsulated tips some of which contained catalyst particles. Two kinds of bamboo mode structures were observed: cone shaped, and cylindrical. The results indicate that the CNT growth is predominantly of the base growth mode, and the formation of the compartments was attributed to the difference in the bulk and surface diffusion of carbon species at the catalyst.

KW - Bamboo mode

KW - Formation process

KW - Morphologies

KW - Multiwalled carbon nanotubes

UR - http://www.scopus.com/inward/record.url?scp=2442449215&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2442449215&partnerID=8YFLogxK

U2 - 10.1016/j.diamond.2004.01.009

DO - 10.1016/j.diamond.2004.01.009

M3 - Article

VL - 13

SP - 1287

EP - 1291

JO - Diamond and Related Materials

JF - Diamond and Related Materials

SN - 0925-9635

IS - 4-8

ER -