974285.fig.002a
(a)
974285.fig.002b
(b)
974285.fig.002c
(c)
974285.fig.002d
(d)
Figure 2: (a) XRD patterns of HSCG and crystalline Sn; (b) typical FESEM and (c and d) TEM images of HSCG. Inset of (d) shows eggs with an egg support, which is similar to HSCG nanostructure where a core-shell Sn@C is supported by planar graphene sheets.