Interaction between DNA and Trimethyl-Ammonium Bromides with Different Alkyl Chain Lengths
Figure 5
Typical scanning images of DNA-surfactant complexes with the same scale shown in Figure 5(a); (a)-(b) the CTAB-DNA complexes with [CTAB] = 10 and 100 μM, respectively; (c)-(d) the TTAB-DNA complexes with [TTAB] = 0.3 and 1 mM, respectively; (e)-(f) the DTAB-DNA complexes with [DTAB] = 2 and 9 mM, respectively; (g) the OTAB-DNA complexes at [OTAB] = 4 mM; (h) the morphology analysis of the particles presented in Figures 5(b) and 5(g). The analyzed particles in Figure 5(g) present a typical height of ~5 nm, which is far less than the height of the particle (35.58 nm) in Figure 5(b).
