Growth of single-walled carbon nanotubes from discrete catalytic nanoparticles of various sizes

Yiming Li, Woong Kim, Yuegang Zhang, Marco Rolandi, Dunwei Wang, Hongjie Dai

Research output: Contribution to journalArticle

609 Citations (Scopus)

Abstract

Discrete catalytic nanoparticles with diameters in the range of 1-2 nm and 3-5 nm respectively are obtained by placing controllable numbers of metal atoms into the cores of apoferritin, and used for growth of single-walled carbon nanotube (SWNTs) on substrates by chemical vapor deposition (CVD). Atomic force microscopy (AFM), transmission electron microscopy (TEM), and micro-Raman spectroscopy are used to characterize isolated nanotubes grown from the discrete nanoparticles. The characterizations, carried out at single-tube and single-particle level, obtain clear evidence that the diameters of nanotubes are determined by the diameters of catalytic nanoparticles. With nanoparticles placed on ultrathin alumina membranes, isolated SWNTs are grown and directly examined by transmission electron microscopy. For the first time, both ends of an as-grown single-walled nanotube are imaged by TEM, leading to a microscopic picture of nanotube growth mechanism. It is shown that controlling the structures of catalytic nanoparticles allows the control of nanotube diameter, and could also enable the control of SWNT length and eventually chirality.

Original languageEnglish
Pages (from-to)11424-11431
Number of pages8
JournalJournal of Physical Chemistry B
Volume105
Issue number46
DOIs
Publication statusPublished - 2001 Nov 22
Externally publishedYes

Fingerprint

Single-walled carbon nanotubes (SWCN)
Nanotubes
nanotubes
carbon nanotubes
Nanoparticles
nanoparticles
Transmission electron microscopy
transmission electron microscopy
Apoferritins
Aluminum Oxide
Chirality
chirality
Raman spectroscopy
Chemical vapor deposition
Atomic force microscopy
Alumina
aluminum oxides
Metals
vapor deposition
atomic force microscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Growth of single-walled carbon nanotubes from discrete catalytic nanoparticles of various sizes. / Li, Yiming; Kim, Woong; Zhang, Yuegang; Rolandi, Marco; Wang, Dunwei; Dai, Hongjie.

In: Journal of Physical Chemistry B, Vol. 105, No. 46, 22.11.2001, p. 11424-11431.

Research output: Contribution to journalArticle

Li, Yiming ; Kim, Woong ; Zhang, Yuegang ; Rolandi, Marco ; Wang, Dunwei ; Dai, Hongjie. / Growth of single-walled carbon nanotubes from discrete catalytic nanoparticles of various sizes. In: Journal of Physical Chemistry B. 2001 ; Vol. 105, No. 46. pp. 11424-11431.
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