Multilayer carbon nanotube films

C - Chemistry – Metallurgy – 01 – B

Patent

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Details

C01B 31/02 (2006.01) D01F 9/12 (2006.01) D01F 9/127 (2006.01)

Patent

CA 2370022

This invention relates to a process for the preparation of a substrate-free aligned nanotube film comprising: (a) synthesising a layer of aligned carbon nanotubes on a quartz glass substrate by pyrolysis of a carbon-containing material in the presence of a suitable catalyst for nanotube formation; and (b) etching quartz glass substrate at the nanotube/substrate interface to release said layer of aligned nanotubes from the substrate. Another aspect of the invention provides a process for the preparation of multilayer carbon nanotube film comprising depositing a substrate-free carbon nanotube film onto another nanotube film. In yet another aspect of the invention there is provided a process for the preparation of a "hetero-structured" multilayer carbon nanotube film which includes one or more carbon nanotube layers together with layers of other materials, such as metal, semiconductor and polymer.

La présente invention concerne un procédé de préparation d'un film de nanotube aligné sans substrat. Ce procédé consiste (a) à synthétiser une couche de nanotubes de carbone alignés sur un substrat de verre de silice par pyrolyse d'un matériau à base de carbone en présence d'un catalyseur approprié pour la formation du nanotube, et (b) graver le substrat de verre de silice au niveau de l'interface nanotube/substrat pour libérer ladite couche de nanotubes alignés du substrat. Selon un autre aspect, la présente invention concerne un procédé de préparation d'un film de nanotube de carbone à multiples couches consistant à déposer un film de nanotube de carbone sans substrat sur un autre film de nanotube. Selon encore un autre aspect, l'invention traite d'un procédé de préparation d'un film de nanotube de carbone à multiples couches <= hétéro-structurées >= qui comprend une ou plusieurs couches de nanotube de carbone avec des couches d'autres matériaux, comme le métal, les semiconducteurs et les polymères.

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