Patent ID: 9409102
Filing Date: 2016-08-09
CPC Classification: B01D,B82Y,C01B,Y10S

Claim Text:
1. A method for processing carbon nanotubes to isolate single-walled carbon nanotubes from double and multi-walled carbon nanotubes, the method comprising: preparing a starting material including single-, double-, and multi-walled carbon nanotubes, the single-walled carbon nanotubes having a first density and the double and multi-walled carbon nanotubes together having second density; dispersing the starting material in a aqueous solution to form a first solution including said single, double- and multi-walled carbon nanotubes; depositing a second solution in a tube, said second solution having a third density between said first and second densities; depositing the first solution in the tube, above the second solution; and using differences between the first, second and third densities to isolate the single-walled carbon nanotubes from the double- and multi-walled carbon nanotubes in the tube, with the second solution between the single-walled carbon nanotubes and the double and multi-walled carbon nanotubes.