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

Figure 2

(a) Absorption spectrum of the Au@tiopronin. (b) Absorbance titration of AuNPs/DNA system recorded for increasing concentrations of DNA. [AuNPs] = 1.58×10⁻⁶ M; [DNA] = 0 M (top); [DNA] = 1×10⁻⁴ M (bottom).

(a)

(b)