Fig. 5. Effect of the SDS/SC concentration ratio and temperature on the S₁₁ peak shifts of (6, 5) and (9, 1) and the surfactant coating on them.

(A) S₁₁ peak shifts of (6, 5) and (9, 1) as a function of the concentration ratio of SC and SDS at various temperatures. Notably, the SDS concentration is varied with fixed 0.5 wt % SC in the left two panels; the SC concentration is varied with fixed 2 wt % SDS in the right two panels. (B) Schematic illustration of the surfactant coating structure change on an SWCNT when SDS molecules are introduced into SC dispersing SWCNTs. (C) Schematic illustration of the effect of the SDS/SC ratio on the surfactant coating change on SWCNTs. The colored regions correspond to the three stages in (A).