Figure 3. (a) Representative UV-visible spectra of solutions prepared
by reacting various concentrations (3.5-14.2 nM) of 12 nm
AuNPs with KCN. UV-visible spectroscopy can determine the
DNA bound to AuNPs in solutions containing ≥1.5 nM 12 nm
AuNPs. (b) Calibration curve used to determine the contribution
of decomposed AuNPs to decomposed DNA-NP absorbance
spectra (n = 24). The R2 value for the linear fit was 0.968.