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(a) schematic representation of topological constraints on the micelle using linear diblock (A-B), linear triblock (A-B-A), and cyclic diblock (A-B) polymers. AFM topographic images of PS-PI micelles in heptane at concentrations (b) 0.1 mg/mL, (c) 1 mg/mL, and (d) 5 mg/mL. Reprinted with permission from [53]. Copyright 2003 American Chemical Society.
