Size-Dependent Photodynamic Activity of Gold Nanoparticles Conjugate of Water Soluble Purpurin-18-N-Methyl-D-Glucamine

Figure 5

Cell viability (%) of PS1 (0–25 μg/mL) and the PS-GNPs conjugates 2a–2e against A549 cells by exposure to an irradiation after 3 h, 24 h, and 48 h incubation times at 670–710 nm (2 J·cm⁻²) for 15 min.

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