(a) Diagnostic effects of different nanoparticles fabricated using FNP on intact normal or tumor-bearing zebrafish. (Reprinted with permission from Ref. [138]. 2018, American Chemical Society.) (b) NPs formed using FNP-based charge-conversion enhance cancer imaging in tumor and other organs ex vivo (T: tumor, H: heart, Lu: lung, S: spleen, Li: liver, K: kidney). (Reprinted with permission from Ref. [181]. 2018, American Chemical Society.)