Fig. 1 . Characterization of PB, HMPB and OHH NPs .
(A-C)TEM images of PB, HMPB and OHH NPs. (D) Hydrodynamic sizes
distribution of PB, HMPB and OHH NPs determined by dynamic light
scattering (E) Zeta potentials of PB, HMPB and OHH NPs. (F) UV–Vis
spectra of NPs. (G,H) FT-IR spectra of NPs. (I) XPS survey scan of NPs.