Fig. 5. Scanning electron microscopy (SEM) morphology of PSA treated with compound 8d ((A) 8d, 10 μm; (B) 8d, 5 μm; (C) 8d, 3 μm; (D) CK, 10 μm; (E) CK, 5 μm; (F) CK, 3 μm).
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