Fig. 3: Morphological evolution by cryo-TEM.

a–c PLLA45-b-PEG45 (10% solids w/w 9), a = 1 h, b = 6 h, c = 24 h. d–f PLLA90-b-PEG45 (10% solids w/w 15), d = 5 min, e = 3 h, f = 6 h. The data show two distinct assembly mechanisms that appear to be a result of unimer addition (sample 9) and particle aggregation (sample 15), resulting in lamellae with different morphologies.