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Morphology of mPEG–PCL-g–PEI (5000-2000-2000) nanoparticles determined by transmission electron microscopy (A and B) and atomic force microscopy (C and D). (A) mPEG–PCL-g–PEI blank micelles; (B) micelles containing doxorubicin at a copolymer concentration of 0.5 mg/mL; (C) mPEG–PCL-g–PEI blank micelles; and (D) mPEG–PCL-g–PEI/DNA complexes.
Note: The scale bar is 100 nm.
Abbreviations: PEG, polyethylene glycol; PCL, poly ɛ-caprolactone; PEI, polyethylenimine.
