Method for preparing single walled carbon nanotubes from a...

C - Chemistry – Metallurgy – 01 – B

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C01B 31/00 (2006.01)

Patent

CA 2647569

Methods of preparing single walled carbon nanotubes are provided. An arrangement comprising one or more layers of fullerene in contact with one side of a metal layer and a solid carbon source in contact with the other side of metal layer is prepared. The fullerene/metal layer/solid carbon source arrangement is then heated to a temperature below where the fullerenes sublime. Alternatively, a non-solid carbon source may be used in place of a solid carbon source or the metal layer may simply be saturated with carbon atoms. A multiplicity of single walled carbon nanotubes are grown on the fullerene side of the metal layer, wherein at least 80% of the single walled carbon nanotubes in said multiplicity have a diameter within ± 5% of a single walled carbon nanotube diameter D present in said multiplicity, said diameter D being in the range between 0.6-2.2 nm.

L'invention concerne des procédés de préparation de nanotubes de carbone à paroi simple. On prépare un dispositif comportant une ou plusieurs couches de fullerène en contact avec une face d'une couche métallique et une source de carbone solide en contact avec l'autre face de la couche métallique. Le dispositif contenant le fullerène/couche métallique/source de carbone solide est ensuite chauffé à une température sous laquelle les fullerènes subliment. Ou bien, on peut utiliser une source de carbone non solide à la place de la source de carbone solide ou bien, la couche métallique peut être simplement saturée d'atomes de carbone. Une multiplicité de nanotubes de carbone à paroi simple sont cultivés sur la face de la couche métallique contenant le fullerène, dans lesquels au moins 80% des nanotubes de carbone à paroi simple de ladite multiplicité ont un diamètre correspondant à ± 5% près à un diamètre D de nanotube de carbone à paroi simple présent dans ladite multiplicité, ledit diamètre D étant compris entre 0,6 et 2,2 nm.

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