Fig. 2
Characterization of 19F-RGD@USPIO probes. A Representative TEM images of 19F-RGD@USPIO nanoparticles. B Size distribution of 19F-RGD@USPIO measured by dynamic light scattering system. C Relaxation properties of 19F-RGD@USPIO. Prussian blue staining of HUVEC and MDA-MB-231 cells incubated with 19F-RGD@USPIO (D). Magnification ×200. Cytotoxicity characteristics of different concentrations of 19F-RGD@USPIO after 6 h, 12 h, 24 h, 36 h and 48 h incubation with MDA-MB-231 cells, error bars denote standard errors (E)