 | Nanotech 2008 Vol. 1
Nanotechnology 2008: Materials, Fabrication, Particles, and Characterization - Technical Proceedings of the 2008 NSTI Nanotechnology Conference and Trade Show, Volume 1
Chapter 1: Carbon Nano Structures & Applications |
Simultaneous Tip and Base Growth of Carbon Nanotubes Produced by RF Plasma Enhanced CVD | |
| Authors: | J. García-Céspedes, E. Pascual, E. Bertran |
| Affilation: | IN2UB, Universitat de Barcelona, ES |
| Pages: | 148 - 151 |
| Keywords: | PECVD, oriented CNTs, tip-growth, base-growth mechanism |
| Abstract: | In this work, carbon nanotubes (CNTs) with curly and straight segments were synthesized by means of radio-frequency plasma enhanced chemical vapour deposition (rf-PECVD) onto silicon substrates, using Fe as the catalyst material. The origin of this peculiar combination of aligned and misaligned structures within a singular CNT has been discussed in terms of a simultaneous growth process from the tip and the base of the CNT and taking into account a catalyst interaction with the substrate and carbon diffusion through the growing film. Evidences for supporting such a growth mechanism were found by scanning and transmission electron microscopy studies. The growth kinetics is affected by the particular local conditions surrounding CNTs. A direct comparison between growth rate by PECVD and thermal CVD has been extracted from these samples in our experimental setup based on the proposed growth mechanism. |
| ISBN: | 978-1-4200-8503-7 |
| Pages: | 1,118 |
| Hardcopy: | $159.95 |
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