Web Release Date: November 14,
Quantitative Three-Dimensional Reconstruction of Catalyst Particles for Bamboo-like Carbon Nanotubes
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EMAT, University of Antwerp, Groenenborgerlaan 171 B-2020 Antwerp, Belgium, and Vision Lab, University of Antwerp, Universiteitsplein 1 B-2610 Wilrijk, Belgium
Received August 3, 2007
Revised October 13, 2007
Abstract:
The three-dimensional (3D) structure and chemical composition of bamboo-like carbon nanotubes including the catalyst particles that are used during their growth are studied by discrete electron tomography in combination with energy-filtered transmission electron microscopy. It is found that cavities are present in the catalyst particles. Furthermore, only a small percentage of the catalyst particles consist of pure Cu, since a large volume fraction of the particles is oxidized to Cu2O. These volume fractions are determined quantitatively from 3D reconstructions obtained by discrete tomography.
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