Figure 2From: pH induced reversible assembly of DNA wrapped carbon nanotubesPhotograph of the two vials containing SWCNT-G4 and SWCNT-C4 in pH 8.0 (a) and pH 5.0 (b), and two vials containing only SWCNT-G4 in pH 8.0 (c) and pH 5.0 (d). After staying at room temperature for 30 min, Centrifugations at 2000 g for 10 s were applied to the two vials.Back to article page