Solubilization and purification of single-wall carbon nanotubes in water by in situ radical polymerization of sodium 4-styrenesulfonate

The procedure of separating single wall carbon nanotubes (SWNT) from catalyst and excess dispersant for the formation of SWNT with grafted poly(sodium 4-styrenesulfonate) (PSS) was discussed. The excess PSS was removed by ultrafiltration and ultracentrifugation and 68mg of SWNT was produced in the sonification having a mixture of pristine HiPco SWNT and sodium 4-styrene sulfonete (Nass). The diameter length of SWNT was measured by atomic force microscopy in which the diameter came out to be 0.6 to 1.3nm 18. Analysis shows that the disorder band (D) band was at 1315cm -1 with a radial breathing band at 180 to 260 cm -1.