1 2 hexadecanediol

Hydrophobic quantum dots (QDs) were purchased from Suzhou Xingshuo Nanotech Co., Ltd. Green fluorescence-emitting QDs had a fluorescence peak wavelength at 520 nm, and red fluorescence-emitting QDs had a fluorescence peak wavelength at 620 nm. The surface ligand was trioctylphosphine oxide (TOPO) for both green and red QDs. Bovine serum albumin (BSA), bovine α-lactalbumin (BLA), benzyl ether and oleic acid were purchased from Sigma-Aldrich. Iron(iii) acetylacetonate was purchased from Tokyo Chemical Industry Co., Ltd. 1,2-Hexadecanediol was purchased from J&K Chemical Ltd. (Shanghai). Oleylamine was purchased from Kuer Bio-Engineering Co., Ltd. N-Hydroxysulfosuccinimide (NHS) sodium salt, N-(3-dimethylaminopropyl)-N-ethylcarbodiimide (EDC), 2-(N-morpholino)ethanesulfonic acid (MES) buffer and doxorubicin hydrochloride (DOX) were purchased from Aladdin. 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) was purchased from KeyGENBioTECH. Tetrahydrofuran (THF), hexane and absolute ethanol were purchased from Sinopharm Chemical Reagent Co., Ltd. The RGD peptide (sequence Arg–Gly–Asp) was purchased from ChinaPeptides. Cell lines (HeLa and U87MG) and their culture media were purchased from KeyGENBioTECH.