fig1

Figure 1. Schematic of fabrication and characteristics of the multi-layered yolk-shell (MYS). (A) Schematic of the fabrication process for the MYS; (B) Cross-sectional schematic view showing the detailed structural characteristics of the Carbon bridge (CB) MYS; SEM images of (C) SiNP; (D) SiNP@C; (E) SiNP@C@Si; and (F) CB-MYS. SEM: Scanning electron microscopy.