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Particle size analysis. (a) Fe3O4 NPs synthesized using the Tween-80 surfactant at 30°C. (b) Silica-coated Fe3O4 NPs synthesized using the Tween-80 surfactant at 30°C. (c) Fe3O4 NPs synthesized using SDS surfactant at 30°C. (d) SEM micrographs of Fe3O4 synthesized using the Tween-80 surfactant after the DLS analysis.
