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The physicochemical properties of ALA and ERL co-loaded nanoparticles (AE@NPs) were characterized (A) Particle size distribution of NPs, E@NPs, and AE@NPs (B) TEM image of AE@NPs (C) The cumulative drug release of ERL and ALA from free drug solution and AE@NPs (D) The changes in particle size and PDI of AE@NPs in pH7.4 PBS at 4 °C in one week. The results were shown as means ± SD (n = 3).
