Fig. 2.

Morphology and crystal structure of PLLA-b-PEG single crystal and BCCs. a SEM and b TEM micrographs of BCCs in dried state. c TEM micrograph of flat PLLA-b-PEG polymer single crystals grown from toluene with an SAED pattern and the corresponding schematics (d). e A representative cryo-TEM micrograph of BCCs in water. Inset of e is an enlarged image highlighting the BCC wall. f WAXD pattern, g a DSC first heating thermogram and h an SAED pattern of PLLA-b-PEG BCCs. Inset of h shows a corresponding BCC bright field TEM micrograph. Scale bars in a, b, c, e, inset of e, h are 500, 100, 500, 50, 10, and 200 nm, respectively