Figure 2.

Synthetic scheme of preparing Ag-Fe₃O₄ nanocomposites (Up), TEM-EDX characterizations of as-prepared metallic nanoparticles (Down), from top to the bottom were silver nanoparticles (AgNPs), iron oxide nanoparticles (Fe₃O₄NPs), and Ag-Fe₃O₄ nanocomposites (FeAgNPs), respectively. Reaction conditions: i) Dextrin, 1.8 g; H₂O, 200 mL; [Ag⁺], 1 mmol/L, [NH₃], 2.5 mmol/L, 90 °C, 4 h; ii) 3 mL ammonium hydroxide (25%); [Fe³⁺], 0.48 mmol; [Fe²⁺], 0.24 mmol; nitrogen flow, 80 °C, 30 min; iii) FeAgNPs, 50 mg; Dox, 25–250 µg; Tat–SH, 10 µg; H₂O, 1 mL; Room temperature, 2 h.