Growth mechanisms for single-wall carbon nanotubes in a laser-ablation process |
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| Authors: | CD Scott S Arepalli P Nikolaev RE Smalley |
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| Institution: | (1) EM2, NASA Johnson Space Center, Houston, TX 77058, USA (E-mail: c.d.scott@jsc.nasa.gov), US;(2) GB Tech/Lockheed Martin, P.O. Box 58561, Houston, TX 77058, USA, US;(3) Center for Nanoscience and Technology, Rice University, Houston, TX 77005, USA, US |
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| Abstract: | Mechanisms proposed in the literature are compared with a current scenario for the formation of single-wall carbon nanotubes
in the laser-ablation process that is based on our spectral emission and laser-induced fluorescence measurements. It is suggested
that the carbon which serves as feedstock for nanotube formation not only comes from the direct ablation of the target, but
also from carbon particles suspended in the reaction zone. Fullerenes formed in the reaction zone may be photo-dissociated
into C2 and other low molecular weight species, and also may serve as feedstock for nanotube growth. Confinement of the nanotubes
in the reaction zone within the laser beam allows the nanotubes to be ‘purified’ and annealed during the formation process
by laser heating.
Received: 2 November 2000 / Accepted: 3 November 2000 / Published online: 23 March 2001 |
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| Keywords: | PACS: 42 62 Fi 81 05 Tp 82 80 Ch |
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