Figure 4From: Folic acid-conjugated silica capped gold nanoclusters for targeted fluorescence/X-ray computed tomography imaging Cell viabilities of MGC-803 cells and GES-1 cells incubated with AuNCs@SiO 2 (A) and AuNCs@SiO 2 -FA (B) with different concentrations (31.25, 62.5, 125, 250, 500 μg/ml) for 16 h. Back to article page