Patent ID: 9034213
Filing Date: 2015-05-19
Classification: B03D,B82B,B82Y,C01B,H01B,Y10S

Abstract:
1. A method of using a density gradient to separate single-walled carbon nanotubes, said method comprising: centrifuging a nanotube composition in contact with a fluid medium comprising a density gradient, said nanotube composition comprising a surface active component selected from linear and X-shaped amphiphilic block copolymers of poly(ethylene oxide) and poly(propylene oxide) and combinations thereof, 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; and separating said nanotube composition into a plurality of separation fractions, at least one of said separation fractions enriched with single-walled carbon nanotubes of at least one of said selected nanotube diameter, nanotube chirality and nanotube electronic type, said enrichment relative to said nanotube composition.