Imaging as-grown single-walled carbon nanotubes originated from isolated catalytic nanoparticles

Y. Zhang, Y. Li, Woong Kim, D. Wang, H. Dai

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Abstract

Discrete catalytic nanoparticles with diameters in the range of 1-3 nm are obtained by placing controllable numbers of metal atoms into the cores of apoferritin. With nanoparticles placed on transmission electron microscope (TEM) grids coated with ultra-thin alumina membranes, isolated single-walled carbon nanotubes are grown by chemical vapor deposition and directly examined by TEM. The characterizations, carried out at single-tube and single-particle level, obtain clear evidence that the diameters of the nanotubes are determined by the diameters of catalytic nanoparticles. For the first time, both ends of an as-grown single-walled nanotube are imaged by TEM, leading to a microscopic picture of the nanotube-growth mechanism.

Original languageEnglish
Pages (from-to)325-328
Number of pages4
JournalApplied Physics A: Materials Science and Processing
Volume74
Issue number3
DOIs
Publication statusPublished - 2002 Mar 1
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy (miscellaneous)

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