Polyethylene Glycol-Coated Gold Nanoparticles as DNA and Atorvastatin Delivery Systems and Cytotoxicity Evaluation

Figure 3

Optical characterization of the gold nanoparticles and stability test. (a) UV-visible absorption spectra of 40 nm AuNPs and AuNP-PEG. (b) UV-vis absorption spectra of AuNPs and (c) AuNP-PEG at different pH.