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. 2019 Nov 4;14:8647–8663. doi: 10.2147/IJN.S218632

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© 2019 Zhang et al.

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(a) TEM images of MPDA nanoparticles: (i) ~80 nm, (ii) ~140 nm, and (iii) ~190 nm. The scale bars are 100 nm. (b) Hydrodynamic diameters of MPDA (~190 nm) before and after PEG modified. (c) Photographs of MPDA before and after PEG modified in different media (water, PBS, RPMI-1640 medium (containing 10% FBS), FBS) for 4 hrs.

Abbreviations: TEM, transmission electron microscope; MPDA, mesoporous polydopamine; PEG, polyethylene glycol; PBS, phosphate buffer saline; RPMI, Roswell Park Memorial Institute; FBS, fetal calf serum.