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El Mel, A. A., Achour, A., Xu, W., Choi, C. H., Gautron, E., Angleraud, B., Granier, A., Le Brizoual, L., Djouadi, M. A. & Tessier, P. Y. (2011) Hierarchical carbon nanostructure design: ultra-long carbon nanofibers decorated with carbon nanotubes. Nanotechnology, 22 435302. 
Added by: Laurent Cournède (2016-03-10 21:32:19)
Type de référence: Article
DOI: 10.1088/0957-4484/22/43/435302
Numéro d'identification (ISBN etc.): 0957-4484
Clé BibTeX: ElMel2011b
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Catégories: PCM
Mots-clés: deposition, growth
Créateurs: Achour, Angleraud, Choi, Djouadi, El Mel, Gautron, Granier, Le Brizoual, Tessier, Xu
Collection: Nanotechnology
Consultations : 2/445
Indice de consultation : 2%
Indice de popularité : 0.5%
Résumé     
Hierarchical carbon nanostructures based on ultra-long carbon nanofibers (CNF) decorated with carbon nanotubes (CNT) have been prepared using plasma processes. The nickel/carbon composite nanofibers, used as a support for the growth of CNT, were deposited on nanopatterned silicon substrate by a hybrid plasma process, combining magnetron sputtering and plasma-enhanced chemical vapor deposition (PECVD). Transmission electron microscopy revealed the presence of spherical nanoparticles randomly dispersed within the carbon nanofibers. The nickel nanoparticles have been used as a catalyst to initiate the growth of CNT by PECVD at 600 degrees C. After the growth of CNT onto the ultra-long CNF, SEM imaging revealed the formation of hierarchical carbon nanostructures which consist of CNF sheathed with CNTs. Furthermore, we demonstrate that reducing the growth temperature of CNT to less than 500 degrees C leads to the formation of carbon nanowalls on the CNF instead of CNT. This simple fabrication method allows an easy preparation of hierarchical carbon nanostructures over a large surface area, as well as a simple manipulation of such material in order to integrate it into nanodevices.
Added by: Laurent Cournède  
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