Cambridge University Technical Services Limited

Other

Cambridge Enterprise Limited

Alan Windle

Ian Kinloch

Milo Sebastian Peter Shaffer

Charanjeet Singh

Krzysztof Kazimierz Koziol

Agnieszka Ewa Lekawa-Raus

Brian F G Johnson

Douglas Shephard

Martin Pick

Krzysztof K K Koziol

Yali Li

Stephen Lee Cash

Milo S P Shaffer

Rajyashree Sundaram

Junfeng Geng

Krzysztof Kazimiers Koziol

The present invention relates to carbon materials comprising carbon nanotubes, powders comprising carbon nanotubes and methods of making carbon nanotubes. In the methods of the present invention, the size and/or formation of floating catalyst particles is closely controlled. The resulting carbon nanotubes typically exhibit armchair chirality and typically have metallic properties. The carbon nanotubes produced by this method readily form bulk materials, which typically have a conductivity of at least 0.7&#xd7;106 Sm&#x2033;1 in at least one direction. The invention has particular application to the manufacture of components such as electrical conductors. Suitable electrical conductors include wires (e.g. for electrical motors) and cables (e.g. for transmitting electrical power).

Carbon materials comprising carbon nanotubes and methods of making carbon nanotubes

A method for the preparation of carbon nanotube modified fluids such, that the dispersion of nanotubes in such fluids, exampled by those which are oil based is enhanced through the combined use of mechanical, sonic and ultrasonic devices.

Method of making carbon nanotube dispersions for the enhancement of the properties of fluids

A method of production of carbon nanoparticles comprises the steps of: providing on substrate particles a transition metal compound which is decomposable to yield the transition metal under conditions permitting carbon nanoparticle formation, contacting a gaseous carbon source with the substrate particles, before, during or after said contacting step, decomposing the transition metal compound to yield the transition metal on the substrate particles, forming carbon nanoparticles by decomposition of the carbon source catalysed by the transition metal, and collecting the carbon nanoparticles formed.

CVD synthesis of carbon nanotubes

A method for producing aligned carbon nanotubes and/or nanofibres comprises providing finely divided substrate particle having substantially smooth faces with radii of curvature of more than 1 &#x3bc;m and of length and breadth between 1 &#x3bc;m and 5 mm and having catalyst material on their surface and a carbon-containing gas at a temperature and pressure at which the carbon-containing gas will react to form carbon when in the presence of the supported catalyst, and forming aligned nanotubes and/or nanofibres by the carbon-forming reaction.

Method for producing carbon nanotubes and/or nanofibres

A process for production of an agglomerate comprises the steps of:

Production of agglomerates from gas phase

A method for producing nanoscaled carbon materials comprising providing, dispersed in a carrier gas, finely divided substrate particles on which to nucleate a catalyst, providing in said carrier gas a catalyst precursor material, decomposing the catalyst precursor material to form a catalytic metal in the presence of the substrate particles such that the catalyst metal is deposited on said substrate particles to form supported-catalyst particles dispersed in said carrier gas, forming a mixture of said dispersed supported-catalyst particles and a gas comprising a carbon containing gas at a temperature at which said carbon containing gas will react to form carbon when in the presence of said supported-catalyst particles, forming nanoscaled carbon materials by said carbon forming reaction and recovering the nanoscaled carbon materials.

Synthesis of nanoscaled carbon materials

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Cambridge, United Kingdom

Alan Windle