Fig. 3. Penetration of DFMs@NR, nDFMs@NR, and SCMs@NR into A549 multicellular tumor spheroids (MTSs) after 24 h of incubation determined by light sheet fluorescence microscopy (LSFM). For each sample, images from the 30 μm to 120 μm section of the MTSs show a red channel (λex = 540 nm) and the corresponding intensity profile of regions of interest (ROIs) in the randomly traced diameter of each section. Scale bar: 100 μm.
