Formation of filled carbon nanotubes and nanoparticles using polycyclic aromatic hydrocarbon molecules

A. A. Setlur, J. Y. Dai, J. M. Lauerhaas, Robert P. H. Chang

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Nanotubes filled with pure Cu and Ge have been formed by using an arc discharge with metal/graphite composite anodes in a hydrogen atmosphere. These nanotubes are found in the soot deposited on the chamber walls instead of on the redeposited rod on the cathode as is the case with experiments in He. Since Cu and Ge do not form stable carbide phases, catalyze carbon fiber growth or have significant carbon solubility, a new mechanism is needed to explain the formation of these nanowires. It is proposed that polycyclic aromatic hydrocarbon molecules, produced by the hydrogen arc are the precursors to the graphitic layers encapsulating the Cu or Ge nanowire. Direct evidence for this mechanism is given by evaporating pyrene (C16H10) and Cu or Ge together to form filled nanotubes. When evaporating a composite anode in hydrogen using ferromagnetic elements, such as Co, encapsulated nanoparticles are formed instead of nanowires. Encapsulated nanoparticles are also obtained when evaporating pyrene and cobalt, supporting the assertion that PAH molecules are precursors to nanostructure formation. Reasons for the difference between nanoparticle and nanowire formation are attributed to differences in reactivity of the metal with carbon.

Original languageEnglish
Pages (from-to)721-723
Number of pages3
JournalCarbon
Volume36
Issue number5-6
Publication statusPublished - 1998

Fingerprint

Carbon Nanotubes
Polycyclic Aromatic Hydrocarbons
Polycyclic aromatic hydrocarbons
Nanowires
Carbon nanotubes
Nanotubes
Nanoparticles
Hydrogen
Molecules
Pyrene
Anodes
Carbon
Metals
Soot
Graphite
Composite materials
Cobalt
Chemical elements
Carbon fibers
Carbides

Keywords

  • A. Carbon nanotubes
  • C. transmission electron microscopy (TEM)

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Formation of filled carbon nanotubes and nanoparticles using polycyclic aromatic hydrocarbon molecules. / Setlur, A. A.; Dai, J. Y.; Lauerhaas, J. M.; Chang, Robert P. H.

In: Carbon, Vol. 36, No. 5-6, 1998, p. 721-723.

Research output: Contribution to journalArticle

Setlur, A. A. ; Dai, J. Y. ; Lauerhaas, J. M. ; Chang, Robert P. H. / Formation of filled carbon nanotubes and nanoparticles using polycyclic aromatic hydrocarbon molecules. In: Carbon. 1998 ; Vol. 36, No. 5-6. pp. 721-723.
@article{37a36e3e076d4920908888336c65e30f,
title = "Formation of filled carbon nanotubes and nanoparticles using polycyclic aromatic hydrocarbon molecules",
abstract = "Nanotubes filled with pure Cu and Ge have been formed by using an arc discharge with metal/graphite composite anodes in a hydrogen atmosphere. These nanotubes are found in the soot deposited on the chamber walls instead of on the redeposited rod on the cathode as is the case with experiments in He. Since Cu and Ge do not form stable carbide phases, catalyze carbon fiber growth or have significant carbon solubility, a new mechanism is needed to explain the formation of these nanowires. It is proposed that polycyclic aromatic hydrocarbon molecules, produced by the hydrogen arc are the precursors to the graphitic layers encapsulating the Cu or Ge nanowire. Direct evidence for this mechanism is given by evaporating pyrene (C16H10) and Cu or Ge together to form filled nanotubes. When evaporating a composite anode in hydrogen using ferromagnetic elements, such as Co, encapsulated nanoparticles are formed instead of nanowires. Encapsulated nanoparticles are also obtained when evaporating pyrene and cobalt, supporting the assertion that PAH molecules are precursors to nanostructure formation. Reasons for the difference between nanoparticle and nanowire formation are attributed to differences in reactivity of the metal with carbon.",
keywords = "A. Carbon nanotubes, C. transmission electron microscopy (TEM)",
author = "Setlur, {A. A.} and Dai, {J. Y.} and Lauerhaas, {J. M.} and Chang, {Robert P. H.}",
year = "1998",
language = "English",
volume = "36",
pages = "721--723",
journal = "Carbon",
issn = "0008-6223",
publisher = "Elsevier Limited",
number = "5-6",

}

TY - JOUR

T1 - Formation of filled carbon nanotubes and nanoparticles using polycyclic aromatic hydrocarbon molecules

AU - Setlur, A. A.

AU - Dai, J. Y.

AU - Lauerhaas, J. M.

AU - Chang, Robert P. H.

PY - 1998

Y1 - 1998

N2 - Nanotubes filled with pure Cu and Ge have been formed by using an arc discharge with metal/graphite composite anodes in a hydrogen atmosphere. These nanotubes are found in the soot deposited on the chamber walls instead of on the redeposited rod on the cathode as is the case with experiments in He. Since Cu and Ge do not form stable carbide phases, catalyze carbon fiber growth or have significant carbon solubility, a new mechanism is needed to explain the formation of these nanowires. It is proposed that polycyclic aromatic hydrocarbon molecules, produced by the hydrogen arc are the precursors to the graphitic layers encapsulating the Cu or Ge nanowire. Direct evidence for this mechanism is given by evaporating pyrene (C16H10) and Cu or Ge together to form filled nanotubes. When evaporating a composite anode in hydrogen using ferromagnetic elements, such as Co, encapsulated nanoparticles are formed instead of nanowires. Encapsulated nanoparticles are also obtained when evaporating pyrene and cobalt, supporting the assertion that PAH molecules are precursors to nanostructure formation. Reasons for the difference between nanoparticle and nanowire formation are attributed to differences in reactivity of the metal with carbon.

AB - Nanotubes filled with pure Cu and Ge have been formed by using an arc discharge with metal/graphite composite anodes in a hydrogen atmosphere. These nanotubes are found in the soot deposited on the chamber walls instead of on the redeposited rod on the cathode as is the case with experiments in He. Since Cu and Ge do not form stable carbide phases, catalyze carbon fiber growth or have significant carbon solubility, a new mechanism is needed to explain the formation of these nanowires. It is proposed that polycyclic aromatic hydrocarbon molecules, produced by the hydrogen arc are the precursors to the graphitic layers encapsulating the Cu or Ge nanowire. Direct evidence for this mechanism is given by evaporating pyrene (C16H10) and Cu or Ge together to form filled nanotubes. When evaporating a composite anode in hydrogen using ferromagnetic elements, such as Co, encapsulated nanoparticles are formed instead of nanowires. Encapsulated nanoparticles are also obtained when evaporating pyrene and cobalt, supporting the assertion that PAH molecules are precursors to nanostructure formation. Reasons for the difference between nanoparticle and nanowire formation are attributed to differences in reactivity of the metal with carbon.

KW - A. Carbon nanotubes

KW - C. transmission electron microscopy (TEM)

UR - http://www.scopus.com/inward/record.url?scp=0000486473&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0000486473&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0000486473

VL - 36

SP - 721

EP - 723

JO - Carbon

JF - Carbon

SN - 0008-6223

IS - 5-6

ER -