Noncovalent Interactions of Tiopronin-Protected Gold Nanoparticles with DNA: Two Methods to Quantify Free Energy of Binding

Figure 4

SEM images of CT-DNA at different concentrations of AuNPs in the presence of [NaCl] = 0.015 M. (a) [AuNPs] = 1×10⁻⁶ M; (b) [DNA] = 2×10⁻⁶ M; (c) [DNA] = 2.5×10⁻⁶, [AuNPs] = 2.5×10⁻⁷ M; (d) [DNA] = 2×10⁻⁶ M, [AuNPs] = 1×10⁻⁶ M.

(a)

(b)

(c)

(d)