2.1 Materials
Pluronic F127 (EO106PO70EO106) was purchased from Sigma-Aldrich Co. Ltd. (U.S.A.). Concentrated sulfuric acid was purchased from Sinopharm Chemical Reagent Co. Ltd. (China). Doxorubicin, glucose and absolute alcohol were purchased from Aladdin Co. Ltd. (China). All chemicals were used as received without further purification.