Catalyzed growth of oriented carbon nanotubes using Fe–organosilicon core–shell nanoparticles

✍ Scribed by C.T. Fleaca; I. Morjan; R. Alexandrescu; F. Dumitrache; I. Soare; L. Gavrila-Florescu; F. Le Normand; O. Ersen

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 556 KB
• Volume: 40
• Category: Article
• ISSN: 1386-9477
• DOI: 10.1016/j.physe.2007.09.154

✦ Synopsis

Iron-based nanocomposites were synthesized by the CO 2 laser-induced co-pyrolysis of Fe(CO) 5 and [(CH 3 ) 3 Si] 2 O (HMDSO) vapors. The obtained nanoparticles exhibited an iron-based core surrounded by an organosilicon polymer shell. Particles having different thicknesses of the polymer shell were deposited by either a spin-coating or by a drop-casting method on Si(1 0 0) substrates. Carbon nanotubes (CNTs) were grown by dc plasma-assisted and filaments-activated CCVD processes in H 2 /C 2 H 2 mixtures at 700 1C. The CNT growth was studied by several analytical techniques: SEM, TEM and Raman spectroscopy. High density of well-aligned, vertical MWCNTs was obtained.