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Titre du document / Document title

Effect of hydrogen on the growth and morphology of single wall carbon nanotubes synthesized on a Fe-Mo/MgO catalytic system

Auteur(s) / Author(s)

BIRIS Alexandru R. ; ZHONGRUI LI ; DERVISHI Enkeleda ; DAN LUPU ; YANG XU ; SAINI Viney ; WATANAHE Fumiya ; BIRIS Alexandru S. ;

Résumé / Abstract

Single wall carbon nanotubes were synthesized from thermal pyrolysis of methane on a Fe-Mo/MgO catalyst by radio frequency catalytic chemical vapor deposition (RF-CVD) using argon as a carrier gas. Controlled amounts of hydrogen (H2/CH4 = 0-1 v/v) were introduced in separate experiments along with the carbon source. The properties and morphology of the synthesized single wall carbon nanotubes were monitored by transmission electron microscopy, Raman scattering, and thermogravimetric analysis. The nanotubes with the highest crystallinity were obtained with H2/CH4 = 0.6. By monitoring the Radial Breathing Modes present in the Raman spectra of the single-wall carbon nanotube samples, the variation of the structural and morphological properties of the carbon nanotubes with the flow level of hydrogen, reflect changes of the catalyst systems induced by the presence of hydrogen.

Revue / Journal Title

Physics letters. A    ISSN  0375-9601   CODEN PYLAAG 

Source / Source

2008, vol. 372, no17, pp. 3051-3057 [7 page(s) (article)]

Langue / Language

Anglais

Editeur / Publisher

Elsevier, Kidlington, ROYAUME-UNI  (1967) (Revue)

Mots-clés d'auteur / Author Keywords

Single wall carbon nanotubes

;

Chemical vapor deposition

;

Catalysis

;

Localisation / Location

INIST-CNRS, Cote INIST : 9425 A, 35400017262693.0200

Nº notice refdoc (ud4) : 20251675



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