Thin-Shelled PEGylated Perfluorooctyl Bromide Nanocapsules for Tumor-Targeted Ultrasound Contrast Agent

Figure 5

Representative negative-stained TEM images of nanocapsule (PLGA: dark gray; PFOB: light gray) with various initial total polymer amount: (a) NCm20, (b) NCm40, and (c) NCm100.