Facile preparation of surface functional carbon dots and their application in doxorubicin hydrochloride delivery

•Glycine as precursor and PEG 2000 as modifier were used to prepare PEG-CDs.•The PEG-CDs had 12nm of dimension and 28.58% of fluorescence quantum yield.•A greater loading capacity and encapsulation efficiency for DOX in PEG-CDs were achieved.•The mechanism of drug loading and behavior of DOX release...

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