Fig. 2From: pH- and acoustic-responsive platforms based on perfluoropentane-loaded protein nanoparticles for ovarian tumor-targeted ultrasound imaging and therapya–c TEM images of FRT, FRT-PFP, and FA-FRT-PFP. d, e The size and zeta potential distribution of FRT, FRT-PFP, and FA-FRT-PFPBack to article page