Rosa Molina, José I.
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Publication Restricted Study on the Ostwald ripening phenomenon of Fe sputtered film on SiO2(2011-12) Rosa Molina, José I.; Cáceres Valencia, Pablo G.; College of Engineering; Quintero Aguiló, Pedro O.; Valentín Rullán, Ricky; Department of Mechanical Engineering; Gallo Zeledon, Enrique J.Nowadays the carbon nanotube (CNT) topic is in the spot of the scientific world. Many techniques have been developed for the production of single walled carbon nanotubes (SWCNTs) but, a standard method to produce long and high purity nanotubes has not been established. The main reason is the dependence of the carbon nanotubes on the catalyst particle on a substrate. The size and termination of the CNT will depend on the average particle size of the catalyst that is governed by the Ostwald ripening phenomenon. This research focuses on the particle size distribution of the catalyst over the substrate and the relationship between time, temperature and thickness of the film to produce a desire particle size. The main interest was to determine the parameters and related equations that control the Fe particle growth and particle size distribution. The study of the Fe particles on silicon oxide surface exhibited a pattern of growth of the Ostwald ripening type and may be used to develop carbon nanotubes. This based on the average particle growth which depends on time and thickness of the film as stated in the statistical analysis.