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(A) TEM image of PB NPs. (B) TEM image of MPB NPs. (C) Particle size distribution of MPB NPs. (D) FTIR spectrum of PEI-MPB, LMWHA and LMWHA-MPB. (E) TEM image of LMWHA-MPB NPs. (F) Particle size distribution of LMWHA-MPB NPs. (G) Apparent zeta potential of LMWHA-MPB.
