* Determined according to the procedure described in NanoLett, 2003, 3, 309-314.
** Prices subject to change without notice.

AP-SWNT: EA-SWNTs synthesized using Ni/Y catalyst, with a narrow diameter distribution peaked at 1.4nm. This material has the highest purity of any commercially available AP-EA-SWNTs (NanoLetters, 2003, 3, 309-314). Our tests of AP-EA-SWNTs from other suppliers with advertised purities of 60-90% show measured purity values in the range of 10-35%. The SWNTs can be dispersed in DMF at concentrations up to 0.1mg/ml, and can be dispersed in water by using surfactants.