Fig. 1
Preparation and characterization of P-IDI. a A scheme that illustrates the synthesis of P-IDI via nanoprecipitation. b TEM image of P-IDI, scale bar: 1 μm. Inset: DLS profile of P-IDI. c Zeta potentials of IDI, DSPE-PEG-NH2 and P-IDI. d The absorption spectra of IDI and P-IDI. The concentrations were normalized to IDI as 100 µg/mL