Methods for Selectively Separating Carbon Nanotubes
A method of separating at least one carbon nanotube having a desired diameter and/or chirality from a mixture of carbon nanotubes having different diameters and/or chiralities is provided. A calixarene of formula (I): wherein n>=4; X is PO3H2, Ra-PO3H, SO3H, or Ra-SO3H; Y is Rb, OH, or ORb; and Ra and Rb are independently selected from the group consisting of optionally substituted alkyl, optionally substituted aryl, optionally substituted arylene alkyl and optionally substituted alkylene aryl is combined with the mixture of carbon nanotubes in an aqueous solvent to produce an aqueous supernatant containing the carbon nanotube(s) having the desired diameter and/or chirality. The aqueous supernatant containing the carbon nanotube(s) is then separated from a residue comprising the remaining carbon nanotubes of the mixture. Semi-conducting or metallic carbon nanotubes may also be separated from a mixture of carbon nanotubes by combining a calixarene of formula (I) with the mixture of carbon nanotubes in an aqueous solvent and separating an aqueous supernatant containing either the metallic or semi-conducting carbon nanotubes from a residue comprising the remaining carbon nanotubes of the mixture.
RASTON COLIN LLEWELLYN [AU]; HUBBLE LEE JOHN [AU]
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