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Representative TEM images obtained for PEG113-PHPMAx diblock copolymers (where x = 150, 200, or 400): (a) spheres prepared at 10% w/w; (b) worms prepared at 7.5% w/w; (c) vesicles prepared at 7.5% w/w; (d) spheres prepared at 15% w/w; (e) worms prepared at 15% w/w; and (f) vesicles prepared at 15% w/w.
