Fig. 1

Characterization of biomimetic PB nanotherapeutics. TEM images of a PB NPs and b PB@M NPs. Scale bar: 50 nm. c UV–Vis absorption spectra of PB-based NPs. d Zeta potential of PB-based NPs. e SERS spectra of PB@DN@M NPs. f Cell viability of HepG2 cells incubated with different concentrations of PB-based NPs for 24 h