Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/86618
Type: Artigo
Title: Cobalt nanoparticles prepared by three different methods
Author: Zola
Andréia Soares
Ribeiro, Renata Uema
Bueno, José Maria Correa
Zanchet, Daniela
Arroyo, Pedro Augusto
Abstract: This work aimed to study cobalt nanoparticles (Co-NPs) preparation using three different methods in order to evaluate the effect of synthesis variables that can influence the nanoparticle size distribution and particle shape. The synthesised nanoparticles were characterised by Transmission Electron Microscopy. The first synthesis employed decomposition of Co2(CO)8, at high temperatures. This procedure resulted in spherical nanoparticles with low size distribution. The size of Co-NPs could be tuned by modification of precursor/surfactant, nevertheless the stirring and injection time influenced the size distribution. Using polyol process, at high temperatures, it was produced undefined-shape nanoparticles. This result suggests that the solution composition, i.e. the amount of trioctylphosphine and oleic acid was not suitable to control both size and shape of nanoparticles. Finally, the method based on reduction with NaBH4 resulted spherical nanoparticles with tiny sizes, indicating that in this case a variation on amount of reductant would be more efficient on the particle size control than a variation in concentration of oleic acid. These results indicated that, for each method, a different variable exists for the control of the distribution size and the shape of the formed particles. © 2014 Copyright Taylor and Francis Group, LLC.
This work aimed to study cobalt nanoparticles (Co-NPs) preparation using three different methods in order to evaluate the effect of synthesis variables that can influence the nanoparticle size distribution and particle shape. The synthesised nanoparticles
Subject: Nanopartículas
Cobalto
Distribuição de tamanhos
Síntese
Country: Reino Unido
Editor: Taylor & Francis
Citation: Journal Of Experimental Nanoscience. , v. 9, n. 4, p. 398 - 405, 2014.
Rights: fechado
Identifier DOI: 10.1080/17458080.2012.662723
Address: https://www.tandfonline.com/doi/full/10.1080/17458080.2012.662723
Date Issue: 2014
Appears in Collections:IQ - Artigos e Outros Documentos

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