Length-based liquid-liquid extraction of carbon nanotubes using a phase transfer catalyst

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dc.contributor.assigneeRice Universityen_US
dc.contributor.publisherUnited States Patent and Trademark Officeen_US
dc.creatorZiegler, Kirk J.en_US
dc.creatorSchmidt, Daniel J.en_US
dc.creatorHauge, Robert H.en_US
dc.creatorSmalley, Richard E.en_US
dc.creatorMarek, Irene Morinen_US
dc.date.accessioned2015-05-04T19:05:50Z
dc.date.available2015-05-04T19:05:50Z
dc.date.filed2005-11-29en_US
dc.date.issued2009-08-25en_US
dc.description.abstractThe present invention is generally directed to new liquid-liquid extraction methods for the length-based separation of carbon nanotubes (CNTs) and other 1-dimensional nanostructures. In some embodiments, such methods are directed to separating SWNTs on the basis of their length, wherein such methods comprise the steps of: (a) functionalizing SWNTs to form functionalized SWNTs with ionizable functional moieties; (b) dissolving said functionalized SWNTs in a polar solvent to form a polar phase; (c) dissolving a substoichiometric (relative to the amount of ionizable functional moieties present on the SWNTs) amount of a phase transfer agent in a non-polar solvent to form a non-polar phase; (d) combining the polar and non-polar phases to form a bi-phase mixture; (e) adding a cationic donor species to the bi-phase mixture; and (f) agitating the bi-phase mixture to effect the preferential transport of short SWNTs into the non-polar phase such that the non-polar phase is enriched in short SWNTs and the polar phase is enriched in longer SWNTs. In other embodiments, analogous methods are used for the length-based separation of any type of CNT, and more generally, for any type of 1-dimensional nanostructure.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.extent10 ppen_US
dc.identifier.citationZiegler, Kirk J., Schmidt, Daniel J., Hauge, Robert H., Smalley, Richard E. and Marek, Irene Morin, "Length-based liquid-liquid extraction of carbon nanotubes using a phase transfer catalyst." Patent US7578941B2. issued 2009-08-25. Retrieved from https://hdl.handle.net/1911/79996.
dc.identifier.patentIDUS7578941B2en_US
dc.identifier.urihttps://hdl.handle.net/1911/79996
dc.language.isoengen_US
dc.titleLength-based liquid-liquid extraction of carbon nanotubes using a phase transfer catalysten_US
dc.typeUtility patenten_US
dc.type.dcmiTexten_US
dc.type.genrepatentsen_US
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