Patent ID: 9266735
Filing Date: 2016-02-23
CPC Classification: B01D,B82Y,C01B,C08G,C08L

Claim Text:
1. A method of using a density gradient to separate single-walled carbon nanotubes, said method comprising: providing a nanotube composition comprising at least one surface active block copolymer and a mixture of single-walled carbon nanotubes, said mixture selected from mixed nanotube diameters, mixed nanotube chiralities, mixed nanotube electronic types and combinations of said mixtures; contacting said nanotube composition with a fluid medium capable of forming a density gradient therein under centrifugation, and centrifuging said nanotube composition; and separating said nanotube composition into at least one separation fraction enriched with single-walled carbon nanotubes of at least one of said selected nanotube diameter, nanotube chirality and nanotube electronic type, said single-walled carbon nanotubes complexed with a said surface active block copolymer, said enrichment relative to said nanotube composition, said method without pre-centrifugation preparation of a linear density gradient.