Gas-phase nucleation and growth of single-wall carbon nanotubes from high pressure CO

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dc.contributor.assigneeRice Universityen_US
dc.contributor.publisherUnited States Patent and Trademark Officeen_US
dc.creatorSmalley, Richard E.en_US
dc.creatorSmith, Kenneth A.en_US
dc.creatorColbert, Daniel T.en_US
dc.creatorNikolaev, Pavelen_US
dc.creatorBronikowski, Michael J.en_US
dc.creatorBradley, Robert K.en_US
dc.creatorRohmund, Franken_US
dc.date.accessioned2015-05-04T19:05:35Zen_US
dc.date.available2015-05-04T19:05:35Zen_US
dc.date.filed2002-07-01en_US
dc.date.issued2004-07-13en_US
dc.description.abstractThe present invention discloses the process of supplying high pressure (e.g., 30 atmospheres) CO that has been preheated (e.g., to about 1000° C.) and a catalyst precursor gas (e.g., Fe(CO)5) in CO that is kept below the catalyst precursor decomposition temperature to a mixing zone. In this mixing zone, the catalyst precursor is rapidly heated to a temperature that results in (1) precursor decomposition, (2) formation of active catalyst metal atom clusters of the appropriate size, and (3) favorable growth of SWNTs on the catalyst clusters. Preferably a catalyst cluster nucleation agency is employed to enable rapid reaction of the catalyst precursor gas to form many small, active catalyst particles instead of a few large, inactive ones. Such nucleation agencies can include auxiliary metal precursors that cluster more rapidly than the primary catalyst, or through provision of additional energy inputs (e.g., from a pulsed or CW laser) directed precisely at the region where cluster formation is desired. Under these conditions SWNTs nucleate and grow according to the Boudouard reaction. The SWNTs thus formed may be recovered directly or passed through a growth and annealing zone maintained at an elevated temperature (e.g., 1000° C.) in which tubes may continue to grow and coalesce into ropes.en_US
dc.digitization.specificationsThis patent information was downloaded from the US Patent and Trademark website (http://www.uspto.gov/) as image-PDFs. The PDFs were OCRed for access purposes.en_US
dc.format.extent26 ppen_US
dc.identifier.citationSmalley, Richard E., Smith, Kenneth A., Colbert, Daniel T., Nikolaev, Pavel, Bronikowski, Michael J., Bradley, Robert K. and Rohmund, Frank, "Gas-phase nucleation and growth of single-wall carbon nanotubes from high pressure CO." Patent US6761870B1. issued 2004-07-13. Retrieved from https://hdl.handle.net/1911/79872.en_US
dc.identifier.patentIDUS6761870B1en_US
dc.identifier.urihttps://hdl.handle.net/1911/79872en_US
dc.language.isoengen_US
dc.titleGas-phase nucleation and growth of single-wall carbon nanotubes from high pressure COen_US
dc.typeUtility patenten_US
dc.type.dcmiTexten_US
dc.type.genrepatentsen_US
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