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This work presents the grafting of poly(ethylene glycol) (PEG) on the SiO2 nanoparticles by the use of the azo‐groups bonded SiO2 as a radical initiator and poly(ethylene glycol) methyl ether methacrylate (PEGMA) as a macromonomer, respectively. Then a kind of organic–inorganic composite particles with brush‐like PEG fixed covalently on the SiO2 nanoparticles, SiO2–PEG, is synthesized. The successful...
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