Fig. 6

BPQDs-DOX@OPM in vivo targeting study. a, b Fluorescence intensity and distribution in animals after tail vein injection of cy5-labeled BPQDs-DOX@OPM at 6, 12, 24, and 48 h. c, d Fluorescence distribution of tumor tissues and heart, liver, spleen, lungs, and kidneys of animals 48 h after tail vein injection of cy5-labeled BPQDs-DOX@OPM. e Fluorescence distribution of DOX in animal tumor tissues 48 h after tail vein injection of cy5-labeled BPQDs-DOX@OPM. f Analysis of DOX fluorescence intensity in animal tumor tissues