Fig. 4

TEM microimages of a Fe₃O₄ NPs and b–e representative P₃ hybrid copolymer micromicelles at various redox states (polymer concentration is 0.5 mg ml⁻¹): b the original micelles, the micelles oxidized by c H₂O₂ and d NaClO, the micelles reduced by Vc from the oxidized micelles by e H₂O₂ and f NaClO, and g, h the micelles at pH of 4.8 and 7.4, respectively