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Characterizations of microparticles. (A, B) The microscopic (A) and fluorescence microscopic (B) images of SMPs. Scale bars, 20 μm. (C, D) SEM images of SMPs (C) and SMPs-MON (D). Scale bars, 1 μm. (E, F) TEM images of SMPs (E) and SMPs-MON (F). Scale bars, 1 μm. (G) Zeta potentials of SMPs before and after TA-Fe3+ networks coating. (H) FTIR of Sericin, SMPs and SMPs-MON. (I–K) The emission spectra of Sericin (I), SMPs (J) and SMPs-MON (K).
