Fig. 7. Intracellular pH mapping using the PFSqG2-5% Pdots (A) and SNARF-1 (B). The Pdots-loaded cells were incubated at 37 °C for 15 min in buffers with various pH values in the presence of 10 μM nigericin. The channels, from left to right, are the bright field, blue channel from PFO emission, red channel from NIR emission, merged and ratio channel.
