এই পাঠটি: SEM image of (a) PS powder, (b) 5% Fe<sub>3</sub>O<sub>4</sub>/PS composite, (c) 10% Fe<sub>3</sub>O<sub>4</sub>/PS composite, (d) 20% Fe<sub>3</sub>O<sub>4</sub>/PS composite, and (e) 30% Fe<sub>3</sub>O<sub>4</sub>/PS composite.