Single-walled carbon nanotubes formation with a continuous CO2-laser: experiments and theory |
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Authors: | E.G. Gamaly A.V. Rode W.K. Maser E. Muñoz A.M. Benito M.T. Martínez G.F. de la Fuente |
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Affiliation: | Departamento de Física, Universidad Autónoma Metropolitana – Iztapalapa, Apartado Postal 55-534, 09340, Mexico D.F., Mexico (Fax: +52-5/724-611, E-mail: egg@xanum.uam.mx), MX Laser Physics Centre, Research School of Physical Science and Engineering, Australian National University, Canberra, ACT 0200, Australia (Fax: +61-2/6249-0029, E-mail: avr111@rsphy1.anu.edu.au), AU Instituto de Carboquímica, CSIC, María de Luna 12, 50015 Zaragoza, Spain (Fax: +34-976/733-318, E-mail: wmaser@carbon.icb.csic.es), ES ICMA, CSIC-Universidad de Zaragoza, María de Luna 3, 50015 Zaragoza, Spain, ES
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Abstract: | It has been proved [1] that the use of a CO2-laser system operating in continuous wave mode (cw) can be efficiently used for the production of carbon single-walled nanotubes (SWNTs). In this article we first describe in detail the variable experimental conditions (different ambient gases, static gas pressure, and gas flow) for SWNT formation and summarize the results of the characterization studies of the synthesized materials. Second, we analyze the influence of the different experimental conditions on the SWNTs formation process. We show that the heat transport, kinetic, and diffusion processes allow us to explain seemingly different formation conditions in a qualitative and semi-quantitative agreement with the experimental results. The presented self-consistent scenario for nanotube formation in a gas phase allowed us to propose future experiments on testing the mechanism of nanotube formation. |
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