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(A and C) Particle sizes and size distributions of the fibroin micro-/nanoparticles fabricated from Thai silk fibroin (FNP-SFT) and Vietnamese silk fibroin (FNP-SFV), and their corresponding scanning electron microscopic (SEM) images (B and D, scale bars of 1 μm and 2 μm, respectively). The particles Fourier-transform infrared (FTIR) spectra are also demonstrated (E).
