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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Cojocaru, Costel Sorin
École Polytechnique
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2019Anisotropy of Assemblies of Densely Packed Co-Alloy Nanoparticles Embedded in Carbon Nanotubescitations
- 2016Optical Scale Polarimetric Device for Nanotube Forest Measurement: An Opportunity to Anticipate Bistatic Polarimetric SAR Images of Tree Trunk Forests at P-Bandcitations
- 2016Optical Scale Polarimetric Device for Nanotube Forest Measurement: An Opportunity to Anticipate Bistatic Polarimetric SAR Images of Tree Trunk Forests at P-Bandcitations
- 2014Nanosecond-laser-induced graphitization and amorphization of thin nano-crystalline graphite films
- 2012Different mechanisms of graphene wall nucleation on Fe and Ni particles
- 2012Current Saturation in Field Emission from H-Passivated Si Nanowirescitations
- 2011Vertically oriented nickel nanorod/carbon nanofiber core/shell structures synthesized by plasma-enhanced chemical vapor depositioncitations
- 2011Iron catalysts for the growth of carbon nanofibers: Fe, Fe3C or both?citations
- 2011Iron catalysts for the growth of carbon nanofibers : Fe, Fe_{3}C$ or both?
- 2011High-quality Single-walled carbon nanotubes synthesis by hot filament CVD on Ru nanoparticule catalystcitations
- 2011Synthesis of few-layered graphene by ion implantation of carbon in nickel thin filmscitations
- 2011Laterally organized carbon nanotube arrays based on hot-filament chemical vapor deposition
- 2010Iron catalyst for the growth of carbon nanofibers: Fe, Fe3C or both?citations
- 2010Nickel catalyst faceting in plasma-enhanced direct current chemical vapor deposition of carbon nanofibers
- 2009Conductance of disordered semiconducting nanowires and carbon nanotubes: a chain of quantum dotscitations
- 2008Growth of vertically aligned arrays of carbon nanotubes for high field emissioncitations
- 2008Localized CVD growth of oriented and individual carbon nanotubes from nanoscaled dots prepared by lithographic sequencescitations
- 2008Density control of electrodeposited Ni nanoparticles/nanowires inside porous anodic alumina templates by an exponential anodization voltage decreasecitations
- 2007Aligned carbon nanotubes catalytically grown on iron-based nanoparticles obtained by laser-induced CVDcitations
- 2006On the role of activation mode in the plasma- and hot filaments-enhanced catalytic chemical vapour deposition of vertically aligned carbon nanotubescitations
- 2006Synthesis of multi-walled carbon nanotubes by combining hot-wire and dc plasma-enhanced chemical vapor depositioncitations
- 2006Study of electron field emission from arrays of multi-walled carbon nanotubes synthesized by hot-wire dc plasma-enhanced chemical vapor depositioncitations
- 2003Ni and Ni/Pt filling inside multiwalled carbon nanotubescitations
Places of action
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article
Iron catalyst for the growth of carbon nanofibers: Fe, Fe3C or both?
Abstract
International audience ; Iron is a widely used catalyst for the growth of carbon nanotubes (CNTs) or carbon nanofibers (CNFs) by catalytic chemical vapor deposition. However, both Fe and Fe-C compounds (generally, Fe3C) have been found to catalyze the growth of CNTs/CNFs, and a comparison study of their respective catalytic activities is still missing. Furthermore, the control of the crystal structure of iron-based catalysts, that is α-Fe or Fe3C, is still a challenge, which not only obscures our understanding of the growth mechanisms of CNTs/CNFs, but also complicates subsequent procedures, such as the removal of catalysts for better industrial applications. Here, we show a partial control of the phase of iron catalysts (α-Fe or Fe3C), obtained by varying the growth temperatures during the synthesis of carbon-based nanofibers/nanotubes in a plasma-enhanced chemical vapor deposition reactor. We also show that the structure of CNFs originating from Fe3C is bamboo-type, while that of CNFs originating from Fe is not. Moreover, we directly compare the growth rates of carbon-based nanofibers/nanotubes during the same experiments and find that CNFs/CNTs grown by α-Fe nanoparticles are longer than CNFs grown from Fe3C nanoparticles. The influence of the type of catalyst on the growth of CNFs is analyzed and the corresponding possible growth mechanisms, based on the different phases of the catalysts, are discussed.