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Energy dispersive spectroscopy (EDS) and corresponding scanning electron microscopy (SEM) of the four samples with trans-cinnamic acid (TCA), silver nanoparticles (AgNP), cinnamomum zeylanicum extract (Cinn) and povidone iodine (PI). From up to down: (a) TCA-AgNP; (b) Cinn-AgNP; (c) TCA-AgNP-PI; (d) Cinn-AgNP-PI.
