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CPS nanoparticle characterization. (A) Proposed structure of a CPS nanoparticle. HMW, high molecular weight; LMW, low molecular weight. (B) 1H NMR of PEG5-LPEI2.5 as the shell in CPS. The chemical shifts corresponding to PEG and PEI are indicated. (C) Transmission electron microscopy of CPS.
