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(a) Self-assembly of amphiphilic block copolymer to form micelles followed by cross-linking of micelles to afford cSCKs. (b) Alexa Fluor 488-NHS conjugation to cSCKs. (c) UV–visible spectroscopy of fluorophore-labelled cSCK. (d–f) Dynamic light scattering measurements of micelles, cSCKs and dye-labelled SCKs. (d) Black bar, number; red bar, volume; blue bar, intensity. (e,f) Blue bar, number; red bar, volume; black bar, intensity.
