Figure 4From: One-step synthesis of platinum nanoparticles loaded in alginate bubblesSEM images of alginate bubbles with different NaBH 4 concentrations. Surface (A to C) and cross-section (D to F). (A and D) 0 mM NaBH4; (B and E) 10 mM NaBH4; (C and F) 20 mM NaBH4.Back to article page