Fig. 1. Morphology of HES 130/0.4, HES 200/0.5, and HES 480/0.5. (A) TEM images of HES. The scale bar is 100 nm and applied for all the TEM images. (B) Statistical analysis of TEM images. (C) AFM images of HES. The scale bar is 50 nm and applied for all the AFM images. (D) AFM height profiles of HES with different molecular weights.