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Characterization of Fer capped aPD-L1 loaded UPMSNP. A) Schematic illustration of aPD-L1 ICB loading and Fer capping in UPMSNP. B) Scanning electron microscope (SEM) and TEM images of synthesized UPMSNP. C) Nitrogen adsorption–desorption isotherms and the pore size distributions of UPMSNP. D) aPD-L1 ICB loading-amount and loading-efficiency of UPMSNP.
