Determination of the Surfactant Density on SWCNTs by Analytical Ultracentrifugation

We report on the extensive characterization of single‐walled carbon nanotubes (SWCNTs) dispersed in a variety of surfactants, such as sodium dodecyl benzene sulfonate (SDBS), sodium cholate (SC), and three synthesized perylene‐based surfactants, by using differential sedimentation in H 2 O and D 2 O. Multidimensional evaluation of the absorption profiles over radius, wavelength, and time allows the determination of the anhydrous specific volumes...