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Despite the robust structure of polyamidoamine (PAMAM) dendrimers, they are not stable when complexed with surfactants. Modification of PAMAM dendrimers by grafting PEG chains on the surface of PAMAM substantially improves its colloidal stability in the presence of sodium dodecyl sulfate (SDS). Michael addition reaction was employed to synthesize PEGylated-PAMAM by activating MPEG with 4-nitrophenylchloroformate...